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Differentiation is based on a series of activation/inactivation of genes (pieces of DNA) through complex cascades of regulation. We cannot observe a differentiating cell individually. Indeed, the "expression profile" depends on the environment: intercellular interactions, cell matrix. It is these extracellular signals that activate the internal regulatory signals. Establishing plans for Drosophila embryo organization or limb bud development in mice are well-known models. In these models, so-called "positional" information plays a major role: a substance present in the form of a concentration gradient in the extracellular medium will or will not trigger intracellular signals, depending on the dose to which the cells along this gradient are exposed.
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UselessAlthough all cells of an organism have the same DNA, they use their genetic makeup differently. Each cell uses specific genes in the chromosome and "turns off" the genes it doesn't use. Therefore, the DNA may be the same, but each sale has different RNA, so different protein molecules are produced.
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The process of cell differentiation is when similar and unspecialized cells formed during the zygote division become different and specialized. For example, liver and kidney cells have the same DNA, but they use the DNA in different ways, so they have different RNA and different protein molecules, so they perform different functions.
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Biology
How can the DNA-RNA-protein pathway affect cell differentiation? for example, cells in the body can be signaled by genes to become muscle or connective tissue, while other cells outside the body are signaled to become epithelial cells.
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Differentiation is based on a series of activation/inactivation of genes (pieces of DNA) through complex cascades of regulation. We cannot observe a differentiating cell individually. Indeed, the "expression profile" depends on the environment: intercellular interactions, cell matrix. It is these extracellular signals that activate the internal regulatory signals. Establishing plans for Drosophila embryo organization or limb bud development in mice are well-known models. In these models, so-called "positional" information plays a major role: a substance present in the form of a concentration gradient in the extracellular medium will or will not trigger intracellular signals, depending on the dose to which the cells along this gradient are exposed.
Choose the right answer. Maria wanted to grow ferns in her garden. At the suggestion of a friend, she collected brown specks from the undersides of fern fronds and then planted them in pots. After a few days, Maria saw small fronds coming out of the container. Which statement explains this phenomenon? A. The fern has passed from the gametophyte generation to the sporophyte generation. B. The fern grew as a result of mitosis. C. The fern has passed from the sporophyte generation to the gametophyte generation. D. The fern became genetically identical
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Option A: The fern has passed from the gametophyte generation to the sporophyte generation.
Biology
At school, Brendan was conditioned to get up from his seat every time he heard the school bell. Brendan was eating in McDonald's with friends when a loud noise, similar to a school bell, came from the kitchen. Without thinking, Brendan jumped up from his seat at McDonalds. Mark the following for this scenario: Unconditioned stimulus (US): Conditioned stimulus (CS): Unconditioned response (UR): Conditioned response (CR):
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At school, Brendan was conditioned to get up from his seat every time he heard the school bell.
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Biology
Which object was developed to help astronomers learn more about the sun?
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Finally Parker.
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Biology
That was most likely the effect on society that came from improvements in blood donation during the First and Second World Wars
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Answer:
Efficient food supplywas most likely an effect on society due to improvements in blood treatment during the First and Second World Wars.
Biology
A species of parrot that feeds on large seeds nests in the same tree as a parrot that feeds on small seeds. How can birds coexist?
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A species of parrot that feeds on large seeds nests in the same tree as a parrot that feeds on small seeds,they occupy different niches.
Biology
What is most likely to help an introduced species become invasive? low reproduction rate large difference between native and new habitats strong predator in new habitat high tolerance for a wide range of conditions
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Explanation: with onegreat tolerancea wide range of conditions in which the species would adapt and thrive, allowing it to reproduce and have everything it needs to survive, grow and take over.
Biology
Suppose there are five genes in pumpkins that have an additive effect on the size of the pumpkin. A homozygous little pumpkin, aabbccddee, weighs 20 lb. Each capitalized allele has an additive influence on the final phenotype by adding or subtracting weight from the base size of the pumpkin. The effect of one capitalized allele is shown in the table. Allele effect A +6 B −2 C −3 D +3 E +4 What would be the potential size range for the pumpkin offspring obtained from a cross between a parent with the genotype aaBbCCDdEe and a parent with the genotype AaBBCcddEe?
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Answer: 900 kg pumpkin
Biology
The element phosphorus is to the right of the element magnesium along the same period in the periodic table of elements. What best describes the relationship between the elements? A. Magnesium has a higher atomic number. B. Phosphorus has a higher atomic mass. C. Magnesium falls into the same category as phosphorus D. Phosphorus has similar chemical properties to magnesium
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B) Phosphorus has a higher atomic mass.
As we move to the right in the periodic table, both atomic number and atomic mass increase. Magnesium belongs to the S block elements (Group 2) and phosphorus belongs to the P block elements (Group-15).
Biology
Which of the following distinguishes why large corporate farms are losing public favor? Farmers raise prices due to water shortage. The public is alarmed by unnatural farming practices on farms. Farms withheld food to get more money. The quality of food on farms has declined since the 1980s.
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Consumers are dissatisfied with how large corporate farms treat nature's natural resources.
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How can the DNA-RNA-protein pathway affect cell differentiation? cells in the body can do that, for example? ›
How might the DNA-RNA-protein pathway affect cellular differentiation? For example, cells in the interior of the body may be signaled by genes to become either muscle or connective tissues, while other cells on the exterior of the body will be signaled to become epithelial cells.
How does DNA affect cell differentiation? ›DNA is so important to cell differentiation because it has the instructions for all different types of specialization. Cell differentiation occurs due to differential gene expression, where some genes are turned on and others are turned off. Genes are coded for in the sequence of nucleotides present in the DNA.
What are the roles of DNA and RNA in cell differentiation? ›This process by which information from a gene is used to make the structures of a cell is called gene expression. Since RNA translates and transcribes the DNA code into proteins (the structures of a cell), it also plays a role in cell differentiation.
How does RNA affect differentiation of specialized cells? ›1 Answer. RNA plays a big role in translating genetic information into the molecular machines and structures of the cell and also making proteins responsible for cell differentiation. It also regulates the activity of genes during cellular differentiation.
How is RNA involved in cell differentiation? ›Answer and Explanation: RNA is important to cell differentiation because it carries genetic information from the nucleus to the ribosomes. Cell differentiation is the process through which stem cells become a specific cell type.