The construction of a cell membrane comprises the endomembrane system, certain proteins, and an internal membrane scheme.
What is the structure of a cell membrane?The phospholipid bilayer, which forms a stable barrier between two aqueous compartments, is the membrane's basic structural element. These compartments are the inside where surface of the organism in the case of the plasma membrane.
What is the role of cell membrane?Most organisms have such a cell membrane, also known as a cell membrane, which protects the cell's internal environment from the external environment. A partially permeable cell membrane make up the cell membrane. The flow of materials to and from the cell is regulated by the cell membrane.
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Garrod hypothesized that inherited diseases such as alkaptonuria, the inability to metabolize the chemical alkapton, occur because.
Genes control the generation of particular enzymes, and persons with the condition have genetic flaws that prevent them from producing some of those enzymes.
What is Garrod's theory regarding inherited metabolic mistakes?Sir Archibald Garrod, a British physician, coined the phrase "inborn error of metabolism" in 1908. He theorized that inherited conditions like alkaptonuria and albinism are caused by enzymes that are either inactive or completely absent from specific metabolic pathways.
Which theory did Garrod put out regarding alkaptonuria?Alkaptonuria was referred to as a "inborn mistake of metabolism" by Archibald Garrod in 1902. He suggested that a specific flaw in the biochemical process for getting rid of liquid wastes results from gene mutation. This mistake is reflected in the disease's phenotype, which is dark urine.
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mendel found that yellow pea pod color (g) was dominant to green pea pod color (g). for each of the crosses below, what percentage of offspring are expected to be yellow?
GG x GG = 100% because both parents have dominant homozygous allele G.
Gg x Gg= 75% because both the parent are heterozygous. The result of yellow offspring is GG:Gg:Gg:gg.
gg x gg = 0% because both the parent are homozygous recessive allele g after cross only green offspring would be seen.
Why is Mendel credited with founding genetics?Through his research on pea plants, Gregor Mendel discovered the fundamental ideas of inheritance. He came to the conclusion that each pair of genes is inherited separately from each parent.
The first rule of inheritance is the dominance principle. Only the dominant traits in the phenotype will be passed down to hybrid offspring, according to the law. Recessive traits are those alleles that prevent the occurrence of a trait, whereas dominant traits are those alleles that cause the occurrence of a trait.
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In osmosis water always moves toward the what solution that is toward the solution with the what solute concentrate
Osmosis is the transport of water molecules by simple diffusion. In osmosis water always moves toward the hypertonic solution that is toward the solution with the greater solute concentration. Option B is correct.
What is osmosis?
Osmosis is one type of passive transport that occurs by simple diffusion. This means it does not need energy and occurs in favor of an electrochemical osmotic gradient.
When lipids move in the membrane, they leave open spaces through which water molecules can move. This transport occurs very slowly.
Since it follows its electrochemical gradient, we can say water moves
From the most diluted side to the less diluted oneWater moves from the less concentrated side to the more concentrated one, concerning solute concentration.From the hypotonic solution to the hypertonic solution.
⇒ A solution is hypertonic to another solution when its solute concentration is higher than the other solution.
⇒ A solution is hypotonic to another solution when its solute concentration is lower than the other solution.
⇒ Solutions are isotonic when their solute concentrations are the same.
In osmosis water always moves toward the hypertonic solution that is toward the solution with the greater solute concentration. Option B is correct.
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Complete question
1. In osmosis, water always moves toward the ____ solution: that is, toward the solution with the ____ solute concentration.
a. Isotonic, greater
b. Hypertonic, greater
c. Hypertonic, lesser
d. Hypotonic, greater
e. Hypotonic, lesser
The site within a chromosome where dna replication begins is known as the of replication.
At precise locations where the DNA double helix is unwound, known as origins, DNA replication begins. The subsequent synthesis of a short RNA fragment known as a primer serves as the initial step in the synthesis of fresh DNA.
Origins in DNA replication are what?Typically, the genomic areas at which DNA replication begins are referred to as DNA replication origins. They do, however, include at least two separate components: the DNA region that is identified and bound by particular proteins and that will form the pre-replication complex (pre-RC).
Is the origin of replication where DNA replication begins?One origin of replication serves as the starting point for DNA replication, and the two replication forks that are formed there travel in opposite directions until they eventually converge approximately halfway around the chromosome.
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The cells inside this structure contain many green organelles called fill in the blank text field 2 type text here.
The leaves' chloroplasts are the region of a plant that has the structures required to absorb carbon dioxide and sunlight.
What seven organelles are there?The nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, vesicles, and vacuoles are among the organelles found in animal cells. Despite not being protected by a membrane, ribosomes are frequently referred to as organelles in eukaryotic cells.
What is a list of cell organelles?Cell organelles in general: Cell membrane, reticulum, Golgi apparatus, cytosol, nucleus, mitochondrion, cytoplasm, lysosome, rough and smooth endoplasmic peroxisome, and the cytoskeleton are examples of general cell organelles that are present in both animal and plant cells.
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When growing cultures, the agar is ________ to separate pathogenic colonies of organisms from colonies of normal flora.
When growing cultures, the agar is inoculated to separate pathogenic colonies of organisms from colonies of normal flora.
Antibiotic susceptibility testing (AST) specifies effective antibiotic dosage and helps in therapy and proper management of an individual patient's health against deadly infections. Antibiotic susceptibility testing is often essential in order to determine which antibiotics to use against a specific strain of bacterium.
Hence, Agar is an ideal solidifying agent for microbiological media because of its melting properties and because it has nutritive value for the vast species of bacteria.
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Deborah Tannen analyzed the talk of men and women and found that, compared to women, men more commonly engage in ______ talk, in order to _____.
According to Deborah Tannen's analysis of the conversation between men and women, males are more likely than women to engage in give-and-take conversation in order to speak and listen.
What is the article's central concept, Tannen?Men do bond, according to Tannen's research, but it takes negotiating in a more competitive environment where they feel like they are being put down if they are listened to for too long. Men also share problems with friends in order to get advice from them on how to solve them or to get reassurance that the issue is unimportant.
What is Tannen's argument concerning gender communication?According to Tannen, a lot of the communication issues that occur between men and women are caused by the different conversational norms and expectations that apply to each sex.
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The atomic number is the number of
Question 13 options:
protons
neutrons
electrons
protons and neutrons
The answer is protons.
Protons = atomic #
Explain the role of water potential in the movement of water from soil through the plant and into the air.
Water potential, which determines the potential energy present in waters and controls how water flows through plants, For photosynthesis to occur, plant use water uptake to move water to the leaves.
What is water potential?The energy needed to move an infinitesimally small amount of water first from sample to a comparative pool or pure free water is known as the water potential. Controlling the blood's water potential is referred to as osmoregulation. The blood is difficult because it contains so many ions, proteins, and other things.
Why does water potential exist?Pressure, gravity, and zeta potentials are a few variables that have an impact on water potential. A system's maximum potential energy grows with increasing pressure potential (p); a system's maximum possible energy falls with decreasing p. Cells constantly use up different substances, some more frequently than others depending on the time of day, night, sweat, tears, etc.
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The dna content of a diploid cell in g1 is y. The dna content of this same cell at metaphase of meiosis i is?.
The DNA content of this same cell at metaphase of meiosis will be 2y.
In sexually reproducing organisms, meiosis is a kind of cell division that results in a reduction in the number of chromosomes in gametes (the sex cells, or egg and sperm). Body (or somatic) cells in humans are diploid, meaning they have two sets of chromosomes (one from each parent).
Each bivalent's two chromosomes separate from one another and migrate to the spindle's opposite pole during anaphase-1. Each pole has a haploid number of chromosomes after anaphase I. Therefore, at metaphase-1, the cell's DNA content will have doubled.
Therefore, each chromosome (or chromatid pair) will contain two double-stranded DNA molecules during mitosis' metaphase.
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Which factor is a density-dependent limiting factor on the florida manatee population?.
Seagrass is a density-dependent limiting factor for the Florida manatee population.
Population density is correlated with density-dependent factors, which become more restrictive as density rises. The accessibility of food, water, and space, as well as the presence of diseases or predators, are examples of density-dependent factors.
Large aquatic creatures called Florida manatees are native to the state of Florida. Manatees can grow to be over 13 feet long and weigh more than 3,500 pounds, but they are normally 9 to 10 feet long from snout to tail and weigh about 1,000 pounds. Typically, manatees consume seagrass. Therefore, the availability of seagrass may be a limiting issue that worsens as the number of manatees rises.
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Differentiate between spores and gametes. (at least in 4 points each)
Answer:
Spores are used in asexual AND sexual reproduction Gametes are used in sexual reproduction only
Spores are produced by bacteria, fungi, algae, and plants.
Gametes are formed through meiosis (reduction division)
Animals don't produce spores
Animals only produce gametes
spores are capable of surviving in harsh environments
gametes are not adapted for harsh environments
recessive x-linked traits are more likely to be expressed in a male fruit fly than a female fruit fly because group of answer choices males are haploid. the male chromosome is more fragile than the female chromosome. the male chromosome is more susceptible to mutations. the male's sry gene doubles the chances that sex-linked genes are expressed. the male's phenotype results entirely from his single x-linked gene.
Answer:
the male's phenotype results entirely from his single X-linked gene
Explanation:
when a round fruit plant is crossed with a long fruit plant their offspring are oval. what is the best explanation for this?
If you cross a round-fruited plant with a long-fruited plant, the offspring will be oval. What is the best explanation for this incomplete dominance
Incomplete dominance results from matin-gs in which each parent's contribution is genetically unique and which produces offspring that are phenotypically intermediate. Incomplete dominance is also called as the semi-dominance and the partial dominance. Mendel described dominance, but not imperfect dominance. Imperfect dominance is a form of gene interaction in which both alleles of a gene are partially expressed at one her locus, often resulting in intermediate or dissimilar phenotypes. Also known as partial dominance. For example, in roses, the red allele is dominant over the white allele.
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colony-stimulating factors (csf) are administered to produce which therapeutic effect?
Colony-stimulating factor (CSF) is effective treatment of cyclic neutropenia. Rare blood disorder which is caused by low levels of neutrophils.
Neutrophils are vital to fight the infection by surrounding and destroying the bacteria that enter the body.
CyN is rare. There are an estimated 1-2 cases per 1 million people worldwide
Causes –
1. Mutations
2. Low levels of neutrophils
3. Cell do not perform correctly
The colony-stimulating factors (CSFs) are hematopoietic growth factors (HGFs) involved in regulation of the formation of nonlymphoid blood cells.
Colony-stimulating factors) are secreted glycoproteins that bind to the receptor proteins on the surfaces of hematopoietic stem cells this activates the intracellular signaling pathways causing the cells to proliferate and differentiate into a specific kind of blood cell which is white blood cell
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The spinal cord is partitioned into a ______ gray matter region and a ______ white matter region.
The spinal cord is partitioned into an inner gray matter region, and an outer white matter region.
The most crucial element joining the body and the brain is the spinal cord. The first or second lumbar vertebral level is where the spinal cord joins the medulla, which is where it extends from the foramen magnum. It is a crucial link that connects the body and the brain in both directions. The spinal cord measures 1 to 1.5 cm in diameter and 40 to 50 cm in length. On each of its sides, two rows of nerve roots follow one another. 31 pairs of spinal nerves are created as a result of the distal fusion of these nerve roots. The spinal cord is a cylinder-shaped mass of evenly distributed white and gray matter in the neurological system.
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which of the following describes fat-soluble vitamins? multiple choice they are absorbed directly from the gi tract into the blood via the hepatic portal vein. they form coenzymes that participate in the metabolism of carbohydrates, fat, and protein. they are readily stored in the body. excesses are excreted in the urine.
The description of fat-soluble vitamins is: they are readily stored in the body.
Vitamins are the food components that are essential for body's growth and good health. Vitamins are of two types: water soluble and fat soluble. Vitamins are micronutrient which means that they are required in very less amounts to fulfil body's requirement.
Fat-soluble vitamins are four. These are: vitamins A, D, E and K. They are fat soluble because they get dissolved in organic solvents and their transportation and absorption in the body is similar to that of fats. The storage of these vitamin in the body is: liver, fatty tissue, and muscles.
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Explain how cold symptoms show that the body is using both lines of nonspecific defenses to fight pathogens.
The innate immune system provides this kind of nonspecific protection through a number of defense mechanisms, which include physical barriers such as the skin, chemical barriers such as antimicrobial proteins that harm or destroy invaders, and cells that attack foreign cells and body cells harbouring infectious agents.
What do you mean by pathogens?A pathogen in the oldest and broadest sense, is any organism or agent that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ.
Moreover, pathogens cause illness to their hosts through a variety of ways. The most obvious means is through direct damage of tissues or cells during replication, generally through the production of toxins, which allows the pathogen to reach new tissues or exit the cells inside which it replicated.
Therefore, pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms.
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Which terms best describe the class of questions that insel and young were addressing when they studied the effect of antidiuretic hormone on monogamous voles by experimentally increasing the number of receptors in the brain?.
When insel and young investigated the impact of aldosterone on monogamous voles by artificially increasing numberbrain, they were addressing a class of topics that can be described as mechanistic.
What is the mechanism of mechanistic biology?In the study of biology, a mechanism is a collection of components and actions that are causally linked and produce one or more effects. Scientists may be able to explain the event by outlining the potential causes.
What is a mechanistic study, exactly?Understanding biological, metabolic, and physicochemical interaction at the molecular level is the aim of MMB. A partnership between BCMP and specialists in cell biology resulted in the creation of MMB, a thriving, interdisciplinary community.
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which of the following describe characteristics of cancer cells? check all that apply. group of answer choices altered gene expression increased dna repair long telomeres invasive highly specialized apoptotic
Characteristics of cancer cells includes long telomeres, invasive and altered gene expression.
Select all that apply. What are some traits of cancer cells?In addition to having aberrant membranes, cytoskeletal proteins, and shape, cancer cells also grow and divide at an excessively fast rate. As benign tumors give way to malignant tumors throughout time, the anomaly in cells can grow gradually from normal cells.
While some DNA mutations are unharmful, others can result in disease. When DNA is altered abnormally, cancerous cells are "born" because they grow more quickly and act differently than they should. These tumor-forming cancer cells keep evolving and diverging from one another as they grow in number.
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Organic material derived from living organisms, including plants and animals, is called
organic fuel.
biomass.
herbage.
fossil fuel.
Answer:
Biomass is renewable organic material that comes from plants and animals.
Biomass is a right answer.
If flower color exhibits incomplete dominance, a cross between red and white flowers will give what color offspring?.
A cross between red and white flowers will give pink color offspring.
Partial dominance is the term used to describe the inheritance pattern that arises when both alleles are present because neither allele is dominant over the other. Only somewhat more dominant than the white bloom allele is the red flower allele. Red and white are combined to make pink. Similar to complete dominant and recessive crosses, the results of a hybrid with partially dominant alleles can still be predicted. Due to the white background of the flower petals, the anthocyanin pigment produced by the red allele appears pink in the heterozygote. This is the only explanation that makes sense for the heterozygote's intermediate color.
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Using a pedigree autosomal recessive traits, such a cystic fibrosis, are easy to follow through the generations. Explain the inheritance of cystic fibrosis in two children of the third generation in
Cystic fibrosis in the two children of the third generation is inherited in an autosomal recessive inheritance pattern.
Autosomal refers to the 46 chromosomes are present. Among them, 44 are the non-sex chromosome & 2 are the sex chromosomes. Chromosomes are the untangled phase of DNA before cell division.
The 22 pairs of chromosomes don’t play a role in determining the sex of the human body. They are responsible for the structure of the body. They provide some unique patterns to the body.
On the other hand, the sex chromosomes are responsible for determining the sex of a human. There are two types of sex chromosomes. One is the X chromosome & another is the Y chromosome.
The chromosomes are referred to as genes when they are about to get divided. The genes can be either dominant or recessive on one generation. Therefore, in the given condition, it is referred to as autosomal recessive inheritance pattern.
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Camillia Is Iron deficient. Which of the following actions should she take to enhance her body's Iron absorption? Check all that apply. Check All That Apply! A. Consuming vitamin C-rich foods or supplements along with iron-containing plant foods B. Eating heme and nonheme iron foods together C. Eating high-fiber foods that are rich sources of phytic and oxalic acids D. Drinking tea with meals and snacks
Combining iron-containing plant meals with vitamin C-rich foods or supplements. Eating heme and nonheme iron foods. This will help her to enhance her body's iron absorption.
What do you mean by iron deficiency?A lack of mineral iron in your body is known as an iron deficit. Hemoglobin is a protein found in red blood cells that your body must produce in order for them to carry oxygen via your blood vessels.
Your tissues and muscles won't receive enough oxygen to function properly if your body doesn't have enough hemoglobin and this leads to the development of anaemia.
Iron deficiency anemia is the most prevalent type of anemia worldwide, despite there being other types as well. The severity of anemia, the rate at which it manifests, your age, and your present health status all influence the signs and symptoms of iron deficiency.
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What is mitosis easy definition?
A eukaryotic cell's nucleus divides in two during the process of mitosis, which is followed by the division of the parent cell into two daughter cells.
What are the feature of Mitosis?Two daughter cells are created from the parent cell during each round of cell division. As a result of the identical chromosome number in the parent and daughter cells, the cell is sometimes referred to as equational cell division. In plants, the process of mitosis promotes the growth of the plant's vegetative parts, such as the root and stem tips. In this process, segregation and combination do not take place.
An organism's development is aided by mitosis. Asexual reproduction occurs during the process of mitosis in single-celled organisms.
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Which tatement bet decribe the tep in mucle contraction when the arcomere i the hortet?
The arcomere i contracted, and the actin and myoin filament are partially overlapped. The arcomere i relaxed, and the actin and myoin filament are partially overlapped. The arcomere i contracted, and the actin and myoin filament are completely overlapped. The arcomere i relaxed, and the actin and myoin filament are completely overlapped
The myosin head bends, pulling the skinny filament towards the muscle of the sarcomere statement guess describes the step in muscle contraction whilst the sarcomere I the hotel.
Whilst (a) a sarcomere (b) contracts, the Z strains pass nearer together and the I band receives smaller. The A band remains the equal width and, at full contraction, the thin filaments overlap. when a sarcomere shortens, some regions shorten while others stay the same length.
Upon muscle contraction, the A-bands do not exchange their duration, while the I-bands and the H-quarter shorten. This reasons the Z traces to come back closer collectively.
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The matter that is composed of myelinated and unmyelinated axons and is superficial to the gray matter of the spinal cord is called matter.
White matter in the brain and spinal cord consists mostly of myelinated nerve fibers along with some unmyelinated fibers and neuroglial cells.
What is white matter?
It refers to the areas of the central nervous system (CNS) that are mainly made up of myelinated axons, also called tracts. It affects learning and brain functions, modulating the distribution of action potentials, acting as a relay, and coordinating communication between different brain regions.
Difference between myelinated and unmyelinated nerve fibers?
The main difference between myelinated and unmyelinated nerve fibers is that myelinated nerve fibers contain myelin insulation whereas unmyelinated nerve fibers do not contain myeline insulation.
Myelin sheath prevents the loss of the impulse during conduction and mostly includes peripheral nerves.
The myelin covering the axons of these fibers gives the white brain matter its white appearance and these axons protected by myelin sheath are not easily damaged by the external environment and the rate of nerve impulse is also high in comparison to unmyelinated axons.
Hence white matter is composed of myelinated and unmyelinated axons and is superficial to the grey matter.
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List the end products of digestion for carbohydrates, fats, proteins.
There are enzymes secreted in the saliva, stomach, duodenum, and from the pancreas.
What are the names of these enzymes what do they act on?
The end products of digestion for carbohydrates, fats, proteins are as follows:
Carbohydrates: Glucose
Fats: Fatty acids and glycerol
Proteins: Amino acids
The digestive enzymes secreted in the saliva, stomach, duodenum, and from the pancreas and their respective substrates are as follows:
Saliva: Salivary amylase (acts on starch), lingual lipase ( acts on fats) and lysozymes (kills pathogenic particles which might have entered the oral cavity via food intake).
Stomach: Pepsin (acts on proteins) and gastric lipase (acts on triglycerides).
Duodenum: Duodenal enterokinase ( acts on trypsinogen and chymotrypsinogen) Maltase (acts on maltose), Lipase (acts on lactose) and Sucrase ( acts on sucrose).
Pancreas: Trypsinogen (inactive form of trypsin), chymotrypsinogen (inactive form of chymotrypsin), elastases (acts on elastin), Lipase ( acts on dietary fat molecules), protease (acts on dietary proteins) and pancreatic amylase (acts on starch molecules).
How do the digestive enzymes secreted in saliva work?Salivary amylase: Digestion of carbohydrates also starts in the mouth. The amylase produced by the salivary glands, breaks down complex carbohydrates i.e, primarily cooked starch into shorter chains or even simple sugars. It's also known as ptyalin at times.
Lingual lipase: The mouth is where lipid digestion begins. Lingual lipase initiates the breakdown of lipids and fats.
Lysozyme: Because food contains microorganisms like bacteria and viruses in addition to important nutrients, it has a limited but nevertheless useful antiseptic function during digestion.
How do the digestive enzymes secreted in stomach work?Pepsin: The primary stomach enzyme is pepsin. It is created by the principal cells of the stomach, which are zymogens that manufacture pepsinogen, an inactive form of the digestive enzyme. The stomach acid then converts pepsinogen into its active form, pepsin. Pepsin breaks down the protein in the diet into more manageable pieces like amino acids and fragments of peptides. As a result, protein digestion primarily begins in the stomach, as opposed to carbohydrate and lipid digestion, which begins in the mouth.
Gastric lipase: It is an acidic lipase that is released by the gastric main cells of the stomach's fundic mucosa. Its pH ranges from 3-6. Gastrointestinal lipase and lingual lipase are the two acidic lipases namely. These lipases do not require bile acid or colipase for effective enzymatic action, in contrast to alkaline lipases (like pancreatic lipase). Gastric lipases act on triglyceride molecules to produce fatty acids and glycerol.
How do the digestive enzymes secreted in duodenum work?Duodenal enterokinase: Trypsinogen is activated into its active i.e, trypsin by the duodenal enzyme enterokinase.
Maltase: Helps in conversion of maltose into glucose.
Lactase: Helps in breaking down of lactose into glucose and galactose.
Sucrase: Breaks down sucrose to produce glucose and fructose.
How do the digestive enzymes secreted in pancreas work?Trypsinogen: Produced as an inactive (zymogenic) protease which is turned into trypsin in the duodenum. Trypsin breaks down proteins at their fundamental amino acids. The duodenal enzyme enterokinase converts trypsinogen into its active form, trypsin.
Chymotrypsinogen: When duodenal enterokinase activates the inactive (zymogenic) protease chymotrypsinogen, it transforms into the enzyme chymotrypsin, which degrades proteins at their aromatic amino acids.
Carboxypeptidase: A protease which removes the protein's terminal amino acid group.
Elastases: Break down various proteins, including elastin.
Pancreatic lipase: Triglycerides are broken down by pancreatic lipase into two fatty acids and a monoglyceride.
Several nucleases, such as DNAase and RNAase, break down nucleic acids.
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The end products of the digestion of carbohydrates are monosaccharides like glucose, fats are fatty acids and glycerol, and proteins are amino acids.
What are the enzymes that help in the digestion process?
Salivary amylase (ptyalin) is a cleavage enzyme produced by the salivary glands that help in the digestion of carbohydrates and converts them into glucose.
Pepsin is an enzyme secreted by the stomach that serves to digest proteins found in the ingested food.
Gastric lipase is an acidic lipase secreted by the gastric chief cells in the fundic mucosa of the cells that helps in the breakdown of fats into fatty acids and glycerol.
Pancreatic enzymes include trypsin and chymotrypsin in the digestion of proteins, amylase in the digestion of carbohydrates, and lipase to break down fats.
Hence, Digestive enzymes are a group of enzymes that break down polymeric macromolecules into smaller building blocks, in order to facilitate their absorption into the cells of the body.
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“The study of cells had its birth with the invention of microscope, but it became a product of the 19th century.” What does this mean?
The invention of microscope led the scientists to look at the tiniest of the things that human eyes were not capable of. A Dutch glassmaker named Zacharias Janssen, invented the microscope which turned out to be the most important invention in the scientific history.
What is a Cell?
In 1665, It was Robert Hooke who came up with the name suggestion called CELL.The word Cell is derived from the Latin word Cella, meaning, Small Room/Chamber/Compound.Cells are known as the smallest unit of Life, that makes up all living organisms and the body tissues.Cells basic function is to provide a structure to the body by combining tissues and extracting nutrients from food and then converting it into energy form to carry out all the basic functions in a living organism.How did microscope became a product of the 19th century?
Even though microscope was invented in the 16th century, but It came in action more in the 19th century.Scientists were amazed by the fact that now the tiniest of tissues can be seen that no ordinary human eyes had ever been able to see before. Major improvements were initiated to the microscopes in the 19th century by the scientists .For example, Achromatic Lenses were implemented, in which the colors can be seen exactly as they are without dispersing it into its diverse constituent colors.And that is how in the 19th century, the development of cell theory was introduced.To learn more about the Microscopes, check this link:
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how did these factors affect evolution in this population? (i.e. selection, mutation, genetic drift, migration.)
Mutation, gene flow, and genetic drift are random tactics with respect to variation they exchange gene frequencies without regard for the outcomes that such modifications may have inside the potential of the organisms to survive and reproduce.
Random genetic drift describes the stochastic fluctuations of allele frequencies due to random sampling in finite populations. over the years, genetic glide can lead to fixation or loss of genetic variants, thereby systematically putting off range from a population.
Migration will exchange gene frequencies by bringing in greater copies of an allele already within the populace or by bringing in a new allele that has arisen by means of mutation. due to the fact mutations do not occur in every population, migration might be required for that allele to spread for the duration of that species.
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