Answer:
The correct answer would be -A pre-mRNA becomes mRNA by cutting out different introns
Explanation:
During the process of the RNA splicing, pre-mRNA has several specific segments of sequence that are identified by the spliceosome and then removed from the pre-mRNA. Specific parts that are removed are known as introns and the parts that stuck to become mRNA are exons.
Gene sequences in the eukaryotic genome can code for more than one protein due to removing the different introns every time to become mRNA from pre mRNA.
what is the difference between the spermatozoon and spermatogonium?
Answer:
Sperms are the male gametes produced in the seminiferous tubules of the testes. The main difference between spermatogenesis and spermiogenesis is that spermatogenesis is the formation of sperm cells whereas spermiogenesis is the maturation of the spermatids into sperm cells.
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A study was conducted to understand the factors controlling the rate at
which molecules or ions travel across cell membranes. An artificial
membrane was created that was composed of a phospholipid bilayer only.
The speed at which various substances crossed this membrane was
measured. Some substances can pass through an actual cell membrane
much faster than they passed through the artificial membrane in this study
Which of the following statements best explains this finding?"
a) Actual cell membranes have a much thicker phospholipid bilayer than the artificial
membrane does
b) Actual cell membranes have a variety of proteins embedded in the membrane that are
absent in the artificial membrane
c) Hydrophobic substances spend more time between the two layers of phospholipid in
the artificial membrane than they do between the layers in an actual membrane
d) Hydrophilic substand spend more time attached to the polar region of the
phospholipids in the artificial membrane than they do attached to the polar region of
the phospholipid in an actual membrane
Answer:
b) Actual cell membranes have a variety of proteins embedded in the membrane that are
absent in the artificial membrane
Explanation:
Wild diploid wheat has seven chromosomes in its pollen. Discuss the major events that had to occur for tetraploid pasta wheat to have evolved. Describe the genome and fertility of pasta wheat (number and kinds of chromosomes).
Answer:
Tetraploid wheat evolved by allopolyploidization and subsequent diploid-like behavior due to cytological diploidization
Explanation:
Durum wheat (Triticum durum) or pasta wheat, is a tetraploid wheat species that has 28 chromosomes, i.e., seven pairs in each genome (2n = 4x = 28). Durum wheat was domesticated from wild emmer wheat, which originated by hybridization of two diploid wheat species with 14 chromosomes: Triticum monococcum (genome AA) and one wild progenitor (genome BB). Triticum durum is a typical example of evolution by hybridization and polyploidization, where the resultant tetraploid species has two complete sets of chromosomes. Allopolyploidization is one of the most common types of plant speciation. During meiosis, 28 chromosomes form 14 homologous chromosome pairs, because homologous chromosomes have developed 'restriction of pairing' (i.e., cytological diploidization). The restriction of pairing to fully homologous chromosomes ensures a correct meiotic behavior, which otherwise would be altered due to the high level of homology that still exists among chromosomes from different wheat progenitors.
i need help with this
Answer:
c is ox and b it the h20 and a is the plastic cup?
A colleague has used computer modeling to design an improved enzyme. To produce this enzyme, the next step is to:___________.
A) look for a bacterium that makes the improved enzyme.
B) mutate bacteria until one makes the improved enzyme.
C) determine the nucleotide sequence for the improved enzyme.
D) synthesize the gene for the improved enzyme.
E) use siRNA to produce the enzyme.
Answer:
C) determine the nucleotide sequence for the improved enzyme.
Explanation:
Computational enzyme design (CED) can be defined as a bioinformatic in silico approach used to model, construct, and enhance enzyme catalysis. CED uses complex optimization algorithms that enable to direct evolution by using computational systems. As a further step, after the modelization of optimal enzymatic activity, bioinformaticians require to determine the nucleotide sequences which will be subsequently used to synthesize the corresponding enzymes.
Compare the normal allele for hemoglobin with the sickle cell allele. How does this difference affect the person’s red blood cells?
Answer:
Sickle cell anemia is an inherited condition in which there aren't enough healthy red blood cells to carry oxygen through an individual's body. The red blood cells of a healthy individual are flexible and round, and they move through blood vessels with no problem, transporting oxygen successfully. However, a person with sickle cell anemia has rigid, sticky red blood shaped like sickles or crescent moons. These cells often get stuck in small blood vessels, which can slow or block blood flow and oxygen delivery to different parts of the body.
The sickle cell anemia trait is found on a recessive allele of the hemoglobin gene, while the regular red blood cell trait is found on the dominant allele. This means that a person must have two copies of the recessive allele (one from their mother and the other from their father) to be born with this condition. People who have one dominant and one recessive allele or both dominant alleles will have healthy red blood cells.
Phagocytosis is an example of ?
Two genes interact to produce various phenotypic ratios among F2 progeny of a dihybrid cross. Design a different pathway explaining each of the F2 ratios below, using hypothetical genes R and T and assuming that the dominant allele at each locus catalyzes a different reaction or performs an action leading to pigment production. The recessive allele at each locus is null (loss-of-function). Begin each pathway with a colorless precursor that produces a white or albino phenotype if it is unmodified. The ratios are for F2 progeny produced by crossing wild-type F1 organisms with the genotype RrTt. Which statement is correct? 12/16 white: 3/16 green: 1/16 yellowA) At least one copy of both dominant alleles results in white; at least one copy of one of the dominant alleles also results in white, but at least one copy of the other dominant allele produces green; and the absence of either dominant allele produces yellow.B) If both dominant alleles are present, the result is green. At least one copy of one specific dominant allele is required for yellow. If that dominant allele is not present, the result is white, regardless of whether the other dominant allele is present.C) At least one copy of each dominant allele results in white, at least one copy of either dominant allele produces green, and the absence of either dominant allele produces yellow.
Answer:
wow ang haba naman yan broo hirap basahin
PLZZZZZZZZZZZZZZZZZZZZZZZ HELP ME THIS DUE TODAY!!!
PUT IT IN YOUR OWN WORDS!!!!
1. What is the name of Saturn's moon that we are studying? *
2. What is the name of the NASA space probe that was sent to study Saturn and its moons? *
OWN WORDSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS
Answer:
We are studying the moon, Titan.
NASA sent the space probe, Cassini, to study Saturn and it's moons.
Explanation:
Explain how exercise and an active lifestyle can improve bone health
and bone density.
Include discussions of osteoblasts vs.
osteoclasts, osteoids, osteocytes, collagen, bone modeling, impact
and increased workload, glucocorticoid effects, mineral intake, or
underloaded bone.
Explanation:
explain how exercise and an active Lifestyle can improve bone health and bone density include discussions of
The process of desalination removes salt from seawater using condensation methods or filtration. Which of the following is least likely to be a problem for widespread use of desalination?
A. To be economical, desalination plants must be build on coastlines
B. Desalination uses large amounts of energy
C. There is a shortage of seawater to use for desalination
D. Desalination is relatively slow
Please help !!!!!!
I need some to calculate this for me.
Pro Tip 1: To calculate the % of cells at rest (in interphase), divide the number of cells in interphase by the total # of cells in the slide (cells in telophase may look like they are almost 2 cells, but you can still count them as 1).
# of cells in interphase ÷ total cells = % of cells at rest
Pro Tip 2: To calculate the % of cells dividing (or mitotic index), add up the cells in prophase, metaphase, anaphase and telophase. Divide that number by the total # of cells in the slide.
# of cells in PMAT ÷ total cells = % of cells dividing (or mitotic index)
Answer:
INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE % of Cells at Rest (interphase)
% of Cells Dividing (Mitotic Index)
Normal Lung
13 cells 2 cells 2 cells 2 cells 1 cell 65% 35%
Cancerous Lung 6 cells 5 cells 3 cells 3 cells 3 cells 30% 70%
Normal Stomach 10 cells 3 cells 3 cells 3 cells 1 cell 50% 50%
Cancerous Stomach 5 cells 5 cells 4 cells 4 cells 2 cells 25% 75%
Normal Ovary 9 cells 5 cells 3 cells 1 cell 2 cells 45% 55%
Cancerous Ovary 3 cells 6 cells 5 cells 3 cells 3 cells 15% 85%
Explanation:
The answers are also down below in the chart if that helps you better make sense of them.
There are 20 cells in each column, to find the ones at rest we simply take the first number in the column and devide it by the number of cells (in this case 20) once we find the percent of cells at rest, we subtract from 100 to see the cells deviding!
Hope this helps another student along the way! :)
Good luck with your studies and have a fantastic winter break!
Hard question help me please :I
Answer:
B
Explanation:
I think it's B because the telophase stage of mitosis is when the cell splits into two identical cells.
Answer:
B
Explanation:
please help me with this question:)
Answer:
The answer is true
Why is the Earth, moon, and all of the other planets layered?
Planetary scientists are pretty sure that Mercury, Venus and Mars also have these layers. ... Not just planets have a core, mantle and crust. Several moons in our solar system have them! The Moon has a core and mantle similar to Earths but the crust is basaltic rock.
Hope it helps you
Answer:
Planets have different layers because different materials have different densities.
Explanation:
Density comes into play on how heavy matter is at a certain size. The planets formed as dust, gas, asteroids and comets collided together.Around the metal cores, the planets have a mantle and crust made of rock
The memory of facts and experiences that people consciously know and can easily recite is known as
memory
Answer:
also known as EXPLICIT memory, are long term memories relating to specific facts and events that can be verbally stated. ... Memory of facts and experiences that one can consciously know and "declare", Information or knowledge that can be consciously recollected; also called declarative memory.
Explanation:
What do inner planets and outer planets have in common, and what are some differences?
Answer:
Inner Planets include Mercury, Venus, Earth and Mars,- these are hotter planets.
Outer planets are colder because they are farther from the sun, a lot farther.
Explanation:
They are all planets.
How does heat affect enzymes?
Answer:
Temperature
Explanation:
Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Extreme pH values can cause enzymes to denature.
Where are the tornado watches and warnings released from?
A) National Weather Service Norman Oklahoma
B) National Hurricane Center, Miami, FL
C) National Weather Service Miami Florida
D) National hurricane center Norman Oklahoma
The tornado watches and warnings released from national Weather Service Norman Oklahoma.
What is National Weather Service Norman Oklahoma?
National Weather Service - Norman, Oklahoma is a Weather Forecast Office of the National Weather Service based in Norman, Oklahoma.
Moreover, it is responsible for forecasts and the dissemination of weather warnings and advisories for central and most of western Oklahoma, and western portions of north Texas.
Therefore, national Weather Service - Norman, Oklahoma (office identification code: OUN) is a Weather Forecast Office (WFO) of the National Weather Service based in Norman, Oklahoma, which is responsible for forecasts and the dissemination of weather warnings and advisories for central and most of western Oklahoma.
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Answer:
A) National Weather Service Norman Oklahoma
Explanation:
I used to live there, plus why would a hurricane service go over that. And tornadoes don't originate in Florida.
The cell cycle is highly regulated and involves many steps to ensure that a cell is ready to divide. For this reason, cells cycle between interphase and mitosis. Suppose a cell culture of 1,000 cells is grown, in which the cells cycle every 24 hours. For a single cell, it takes about two hours from the formation of the dissolution of the nuclear envelope to the separation of two daughter cells.
Which of the following best describes the approximate number of cells in the culture that are in interphase, as well as the consequence of the severe disruption of interphase in mitotic division of cells within a tissue?
A) There are approximately 917 cells in interphase. Disruption of interphase will have no effect on mitosis because they are two completely independent processes.
B) There are approximately 83 cells in interphase. Disruption of interphase will lead to a faster and more efficient mitotic cycle, which will result in increased cell division and tissue growth.
C) There are approximately 917 cells in interphase. Disruption of interphase will trigger the cell to switch to a mitotic phase and repeatedly divide, which will result in the massive proliferation of the cells and heightened tissue growth.
D) There are approximately 83 cells in interphase. Disruption of interphase will result in the cell being unable to synthesize proteins and organelles required to divide, which will result in the cell not passing key checkpoints and ceasing to divide.
Answer:
The two major phases of the cell cycle include mitosis (cell division), and interphase, when the cell grows and performs all of its normal functions. Interphase is further subdivided into G1, S, and G2 phases. After the synthesis phase, the cell proceeds through the G2 phase.
Explanation:
Answer:
I believe it is the first one not 100 percent tho
Explanation:
What are de clinical sings in equine sinovitis
SOMEONE PLZ HELP ME !!!!!!!!!!!!!!!!!!
Answer:
plant :)
Explanation:
if today's first high tide is at 7:00 AM, what time will today's next high tide be? Please do not troll. . . . I have already asked this question like 7 times already and got no answer, except foolishness. Please. :(
Which of the following is a biotic factor?
A) Sunflower
B) Carbon dioxide
С) Soil
D) Sunlight
Answer:
A) Sunflower
Explanation:
Answer:
a) sunflower
Explanation:
because it is a living thing.
Using the Venn Diagram provided, which of these statements could you add to "A?
Answer:
I would say the correct answer is c
Explanation:
The statement that could be added to A is phosphate. The correct option is B.
What is DNA?Deoxyribonucleic acid is a polymer made up of two polynucleotide chains that coil around each other to form a double helix that contains genetic instructions for the development, functioning, growth, and reproduction of all known organisms and viruses. Nucleic acids include DNA and ribonucleic acid.
The fraction of the DNA double helix that supplies structural support to the molecule is known as the phosphate backbone.
The DNA molecule is made up of two strands that wind around each other like a twisted ladder. Each strand has an alternating backbone of sugar (deoxyribose) and phosphate groups.
A nucleotide is made up of a sugar molecule (ribose in RNA or deoxyribose in DNA) linked to a phosphate group and a nitrogen-containing base.
Thus, the correct option is B.
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T/F Cell theory was developed before the invention of the microscope.
A. True
B. False
SOMEONE PLZ HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
The answer is eukaryotes
Explanation:
This is correct because prokaryotes means NO nucleus And Eukaryotes means yes it does have a nucleus
Pro-No
Eu-Yes
Answer:
Eukaryotes
Explanation:
tRNA molecules bring a specific ________________ to the ribosome, according to the ______________. *
2 points
protein, mRNA anti-codon
protein, tRNA codon
amino acid, tRNA anti-codon
amino acid, mRNA codon
Answer:
tRNA molecules bring a specific amino acid to the ribosome, according to the mRNA codon.
Explanation:
In the context of protein synthesis, an mRNA molecule contains the specific codons that encode the amino acids that will be part of the protein. The tRNA is in charge of bringing the amino acids to the ribosome, according to the specific information of the mRNA codons.
The function of tRNA depends on the complementarity that exists between the mRNA codon and the anti-codon tRNA, in such a way that :
The pattern in the amino acid sequence of a protein is indicated by mRNA tRNA has a complementary anticodon, so it will only bring the specific amino acid that the codon encodes.In general terms, each mRNA molecule possesses the genetic code that indicates the amino acid sequence of a protein, and tRNA helps bring those amino acids to the ribosome for synthesis to occur.
How does the structure of bone allow it to function with the immune system? (PLEASE HELP QUICK THEYRE COMING)
Answer:
In addition to providing a structural support for the body and a reservoir for calcium, bone encases the bone marrow, a primary site for hematopoiesis and immune system development.
Explanation:
Which molecule is a high energy output of photosynthesis