Answers
Answer:
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Related Questions
Why were some of Schwann and Schleiden’s ideas about cells incorrect
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Answer:
One of Schwann and Schleiden’s ideas was that cells were originated by spontaneous generation, which was later rejected by Virchow.
Explanation:
Schwann studied animal tissues, and by observing them, he concluded that tissues were made of cells.
Simultaneously, Schleiden arrives at the same conclusion when studying vegetable tissues.
Around 1830, they met and together proposed the first cell theory. The theory stated that:
Every living being is made of cells.Cell is the basic unit of life. Cells are originated by spontaneous generation.Virchow, who studied human tissues, during his observations sow the cell in its dividing process. He then proposed that cells were not originated from spontaneous generation, but they were the product of other pre-existing cells and were originated by cellular division. He rejected the third state of Schwann and Schleiden’s ideas.
A new microorganism is isolated from a lake and is placed into a solution of KCl. The voltage difference across its membrane is measured at 120 mV. How much energy is required to move a proton from the negative side of the membrane to the positive side?
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Answer: [tex]\Delta U=[/tex] 1.922x10⁻²⁰ Joules
Explanation: Electric Potential Energy (U) is the energy a charged object has due to its location in an electric field and it will only exist with the object is charged.
Voltage or Electric Potential Difference (V) is external work done to move a charge from one point to another in a electric field.
These terms have a relationship, which is given by:
[tex]\Delta U=q\Delta V[/tex]
where
q is the charge
Proton is positive and has a charge of 1.6x10⁻¹⁹C.
Unit for potential energy is Joule (J). The relation between mV and J is
1mV = 10⁻³J
Then:
V = 120x10⁻³
V = 0.12
So, for a proton to move from the negative side of a membrane to the positive:
[tex]\Delta U=q\Delta V[/tex]
[tex]\Delta U=1.6.10^{-19}.0.12[/tex]
[tex]\Delta U[/tex] = 1.922 x 10⁻²⁰
Energy necessary to transport a proton from negative side of the membrane to the positive is 1.922 x 10⁻²⁰J.
please help me with this question:)
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A salt is formed during a reaction of sodium and chlorine ions. Which type of bonding occurred?
A. Van der Waals forces
B. hydrogen bond
C. ionic bond
D. covalent bond
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PLEASE HELP ME WITH THIS QUESTION
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Answer:
I Think, point no.4 is answer.
because prokaryotes are simple cells that do not have a nucleus while eukaryotes are complex cells with organelles that to have a nucleus which is where their DNA is stored
ribosomes are to the rer as: a. water toweers are to firefighters b. tires are to a car c. gas stations are to a highway d. propellers are to a helicopter
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Answer:
B. tires are to a car.
Explanation:
Ribosomes are to Rough Endoplasmic Reticulum as tires are to a car. So the correct option is B.
What are ribosomes?
The biological machinery that produces proteins is called a ribosome. Each cell has several ribosomes, which are each composed of two subunits. These two subunits form a tight seal around the messenger RNA molecule before moving down its length and reading each three-letter codon.
The transfer RNA, whose base sequence matches that of the messenger RNA, docks to the ribosome. A specific amino acid can be added to the end of the expanding protein chain by pairing each three-letter messenger RNA codon with the corresponding anticodon on a particular transfer RNA. Once the protein is finished, the ribosome fragments.
The process of making proteins in a cell takes place at an intercellular structure called a ribosome, which is formed of both RNA and protein. The messenger RNA (mRNA) sequence is read by the ribosome, which then converts the genetic code into a specific string of amino acids that develop into extended chains and fold to create proteins.
Therefore the correct option is B.
Read more about ribosomes, here
https://brainly.com/question/241631
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Influenza (the flu) is caused by a virus that attacks the respiratory system. Which type of gene is most likely to be widely expressed in the body of someone who contracts the influenza virus?
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Answer:
The gene that controls production of white blood cells.
Explanation:Gene expression within the body is controlled by the cells, which determine when a specific gene should or should not be expressed. Influenza (the flu) is caused by a virus that attacks the respiratory system
Based on the data you collected, who likely left the the classroom mess?
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Nicole.
Hope this helps!
what spheres would be involved and in what way?
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Answer:
The lithosphere contains all of the cold, hard solid land of the planet's crust (surface), the semi-solid land underneath the crust, and the liquid land near the center of the planet.
Explanation:
SOMEONE PLZ HELP!!!!!!!!!!!!!
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Answer:
Eukaryotic cells probably evolved about 2 billion years ago. Their evolution is explained by endosymbiotic theory. Mitochondria and chloroplasts evolved from prokaryotic organisms. Eukaryotic cells would go on to evolve into the diversity of eukaryotes we know today.
Hope this helps.
Explanation:
Answer:
Eukaryotic cells :)
Explanation:
A population of rabbits has individuals with fur coloring that ranges from white to brown. The population lives in a temperate deciduous forest where the summers are mild and average about 50 degrees Fahrenheit. The winters are often below freezing.
If warmer temperatures last longer into the fall and the average temperature in the winter is getting warmer, what do you expect to happen to the population?
A) The percentage of the population with brown fur will decrease.
B) The percentage of the population with white fur will decrease.
C) The percentage will increase in size, but the color percentages will remain unchanged.
D) The percentage will decrease in size, but the color percentages will remain unchanged.
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Answer:
The answer is B.
Explanation:
If warmer temperatures last longer there will be no need for the white fur
Which compound(s) is/are not an electron carrier(s) involved in the respiratory chain? A. Iron-sulfur proteins B. Cytochromes C. Coenzyme A D. NADH Ubiquinone
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Answer:
fwgwe.
Explanation:
Identify the stages of the water cycle in this model
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Answer:
we need to see the picture
Explanation:
ask the question again and show the picture so i can answer it for you :)
Answer:
Evaporation is where the water is coming out of the ocean up into the air.
I think that is rain happening above the mountain? If so, that is precipitation.
The little river thing coming out of the mountain is runoff.
Explanation:
The energetic driving force for nucleic acid synthesis is a. removal of inorganic phosphate from the growing strand. b. removal of inorganic phosphate from the incoming nucleotide. c. removal of pyrophosphate from the growing strand. d. removal of pyrophosphate from the incoming nucleotide.
Answers
Answer:
that is confusing
Explanation:
Write a food chain from this food web with six trophic levels.
Link In Comments
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Answer:
where is the link I didn't see in comments
NEED HELP RLLY BAD!!
What does glucagon do for the body
1. tells the body to release insulin to lower blood glucose levels
2. tells the body to release glycogen to increase blood glucose levels
3. tells the body to release insulin to increase blood glucose levels
4. tells the body to release glycogen to decrease blood glucose levels
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Please hurry I’m being TIMED
The smaller the load a river has the more sediment it can carry.
Please select the best answer from the choices provided
T
F
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Answer:
true
The smaller the load a river has the more sediment it can carry. TRUE.
Answer:
this is true
Explanation:
i just took the test
A student was asked to compare a cell to a typical home. In this analogy, the cell mitochondria are like the (floor,furnace,or roof) and the cell membrane is like the (walls,doors and windows,oven orattic or garage)
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Answer:
um...
If A Plant Cell Were A House...
Cytoplasm
Vacuole
The Cytoplasm
would be the carpeting. The Cytoplasm is the goo that all the organelles reside in, and all the furniture and stuff in the house kind of sit there in the carpeting.
The vacuole would
be the closets and pantries. The vacuole holds random things that the cell needs, and closets and pantries can hold anything you feel like putting in them, like food or clothes.
Lysosome
Mitochondrion
The mitochondrion would be the kitchen. It produces energy for the cell to use, and the kitchen produces food, energy for humans.
Nucleus
Endoplasmic Reticulum
Rough
The nucleus would be my mom. The nucleus controls the cell, and my mom controls my house.
Ribosomes
The Smooth ER would be just plain hallways. The ER is a vast network of tubing that things the cell needs travel down.
The Rough ER would be hallways filled with cattle. This wouldn't be a very good example, because it isn't a very vast network. A lot of people travel down them, though! The Rough ER is like smooth, except with ribosomes.
If you had a herd of cattle in your yard, it would be them. If not, just the kitchen, like the Mitochondrion. Ribosomes synthesize proteins, and cattle make milk, which is full of protein. Also, in the kitchen you can make proteins with different types of dairy, like cheese or milk.
Smooth
Lysosome
Golgi (apparatus)
The Lysosome would be the trashcans, the recycle, and the compost. The Lysosome kills bacteria and holds it in plus other waste, and we dispose of our waste by putting it in one of the above options.
The Golgi (apparatus) would be my dad. The Golgi sorts and packages macromolecules to get them ready to transport. My dad does the same sort of thing, he's in charge of kind of organizing/sorting things around the house.
Cell Membrane
The Cell Membrane would be
the doors and the screens (on the windows). The cell membrane is a semi-permeable barrier, meaning that some things can get through and some can't. For example, only people who have the right key can open the door. Also, with the screens, air can get in, but flies and bees can't.
Chloroplast
Cell Wall
The Chloroplasts would be solar panels, if you had any, or houseplants if not. The Chloroplasts convert sunlight into energy, and both houseplants and solar panels do this same job.
If a cell were a house,
the walls, floors, and ceiling would be the cell wall because they keep everything in the house inside, just like the cell wall keeps all the organelles inside the cell.
By: Erin M.
find what you need in here ok
Explanation:
Which of the following explains the relationship of marbling to grade of beef?
the lower the amount of marbling, the better the quality of the carcass
the lower the amount of marbling, the higher the grade of the carcass
the more abundant the marbling, the higher the grade of the carcass
O the more abundant the marbling, the poorer the quality of the carcass
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Answer:
the lower the amount of marbling, the higher the grade of the carcass
Explanation:
What function does the egg serve in a birds development?
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Clue 1:
a. DNA is made of nucleotides.
b. Protein is made of amino acids.
c. DNA is located exclusively in the nucleus.
d. Protein is synthesized exclusively in the cytoplasm.
1) What two problems does the transfer of information from DNA to protein need to overcome?
a.
b.
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Answer:
The two problems that the transfer of information from DNA to protein must overcome are:
How to bring the information from the nuclear DNA to the place of protein synthesis? How to convert this DNA information into amino acids and then into proteins?Explanation:
The genetic information is found in the DNA and depends on a specific sequence of nitrogenous bases. This information is transcribed into the messenger RNA, whose base sequence is organized into triplets and codons, each of which encodes an amino acid, as well as establishing the pattern for starting and stopping the synthesis of a protein.
How to bring the information from the nuclear DNA to the place of protein synthesis?The DNA must be transcribed into messenger RNA (mRNA), a process that occurs in the nucleus of the cell. mRNA leaves the nucleus and travels to the cytoplasm, where amino acid synthesis will take place.
How to convert this DNA information into amino acids and then into proteins?Once in the cytoplasm mRNA binds to ribosomes, structures in charge of translating the sequence of nitrogenous bases RNA to synthesize amino acids. The set of ribosomes and rough endoplasmic reticulum are in charge of the assembly of amino acids to produce peptides and proteins.
State the term used to describe an enzyme that functions within a cell.
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Answer:
Enzymes are biological molecules (typically proteins) that significantly speed up the rate of virtually all of the chemical reactions that take place within cells. They are vital for life and serve a wide range of important functions in the body, such as aiding in digestion and metabolism
Explanation:
An intracellular enzymes can be referred to as endocyto enzymes. These are intracellular proteins that accomplish their function within the same cell that synthesized them. They can be either free in the cytosol or associated with an organelle -inside the organelle or fixated to it-.
--------------------------------------------
Enzymes are catalytic intracellular molecules or polypeptides that accelerate different natural chemical reactions. They have specific binding sites to substrate molecules and turn them into product molecules.
Enzymes are in charge of catalyzing cell metabolism. Since they are proteins, they share many properties with all polypeptides. One of these is that they have a limited temperature level at which they denaturalize.
According to the place where they accomplish their function, enzymes can be called
Plasm-specific enzymes ⇒ Their action field is the plasma ⇒ These are exportation proteins.Secreted or Exocyto enzymes ⇒ Their action field are tissues placed far away from where they were produced and released (for instance, the pancreas secretes and releases enzymes that accomplish their function in the duodene) ⇒ These are exportation proteins.Intracellular or Endocyto enzymes ⇒ All enzymes that accomplish their function within the same cell that synthesizes them ⇒ These are intracellular proteins.Within the cell, enzymes can be free in the cytosol, or fixated to an organelle.
Uniloculated enzymes ⇒ 100% cytosolic enzymes.Biloculated enzymes ⇒ They spend part of the time in the cytosol and part in organelles.--------------------------------------------------------
Related link: https://brainly.com/question/13754221?referrer=searchResults
Discuss how a pathogen causes an infection. Include definitions for primary pathogen, opportunistic pathogen, infection, disease (caused by a living organism), and various stages of pathogenesis. You can choose a specific organism to describe
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Answer:
Infections are generated by pathogens, pathogens that generate a rare invasion triggering an extremely risky condition for the host, opportunistic infections are usually caused by highly pathogenic microorganisms with high resistance mechanisms and are really serious signs and symptoms.
Primary pathogen is one that colonizes in a primary way by forming a biofilm or a microbiological ecosystem.
The great difference between infection and infectious disease is that the infection is the presence of microorganisms that cooperate and live with the host without generating pathology, whereas infectious disease is when these microorganisms generate a pathology or condition in the host.
Explanation:
The pathogenesis are different stages that make up the ability of a microorganism to get sick, an example is prevotella parvula or treponema denticola that during pathogenesis they quickly invade the tissues due to their movements, in addition to the tissues such as the mucosa they generate an immune distraction that release toxins in different areas to the invasion.
These are pathogenicity mechanisms, that is, how the microorganism does to be able to invade the tissues in the most oppressive way.
identify the types of orchard farm
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. Oleander is a very hardy plant that can survive in a wide
variety of climates. It is also known to have very distinct
hydrotropic behavior. Explain how this may be problematic if
the oleander is planted near a home or business.
Answers
Answer: you have to tend to it for 1 hour ever day and make sure there are no weed taking the water.
Explanation:
The large central vacuole of plant cells holds water and supports the shape the plant cell as created by the _______________
A. cell wall
B. chloroplasts
C. DNA
D. endoplasmic reticulum
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Match each element or compound with the appropriate symbol or molecular formula.
hydrogen
oxygen
CO2
carbon dioxide
H20
carbon
с
water
H
Answers
Answer: Water- H2O
Hydrogen- H
Carbon- C
Carbon Dioxide- CO2
Explanation:
Answer:
hydrogen = H
oxygen = O
carbon dioxide = CO2
carbon = C
water = H2O
Explanation:
As seen in the picture below,
(Please note that these are NOT in the same order as your question.)
PLSS HELP ,, - - - A group of students were testing different insulators. They used three metal cans, one wrapped with bubble wrap, a second with a paper towel, and third unwrapped. Equal amounts of hot water were poured into each can and the temperature was noted at definite time intervals. The data is shown in the table.
From the data what can you conclude which is the best insulator?
Aluminum can wrapped with paper towel
Just the aluminum can
Aluminum can wrapped with bubble wrap
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Answer:
Without the table, I can't be 100% certain, but I'm sure that your answer is C). It would only make sense, considering the fact that if bubble wrap is being used, you've put 2 layers of plastic and one layer of trapped air between the can and the hand of those who hold it, thus reducing the amount of thermal energy transfer.
Why do polysaccharides have more energy than a disaccharide?
Answers
Answer:
While monosaccharides such as glucose provide short-term energy, polysaccharides provide longer storage of energy. Cells use monosaccharides quickly. The molecules can bond to cell membrane lipids and aid in signaling.
Explanation:
which enzyme reads and builds a complementary strand of dna?
Answers
Answer: RNA polymerase
Explanation:
Transcription begins when an enzyme called RNA polymerase attaches to the DNA template strand and begins assembling a new chain of nucleotides to produce a complementary RNA strand