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3 years ago

Which description best explains the role of DNA im the differentiation of the cells within an organism?

Biology

2 answers:

Levart [38]3 years ago

8 0

Answer: The correct answer is option C.

Explanation:

In a multi-cellular organism, all cells contain same DNA content. However, not all genes (protein coding sequence of the DNA) are expressed in all the cells.

During development or growth or repair different cells express different sets of genes at a time and repress other genes.

The same is explained in the option C.

Cells do not use the same sections of DNA, that is, genes in the same proportions, that is, expressiveness at the same time in development, which leads to differentiation.

For example, different blood cells are formed or differentiated from the same stem cells. It is because different cells express different genes during the development. consequently, different proteins or traits are developed in different cells which ultimately leads to the production of differentiated cells.

Dominik [7]3 years ago

3 0

All the cells in a person's body have the same DNA and the same genes. However, the difference between cells in different tissues and organs is that the "expression" of the genes differs between cells. For example, liver cells have different proteins than skin cells, even though their DNA is the same.

So your answer is B

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2 years ago

Where do all living things on earth exist

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As a metabolic heat.

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Use the numbers 1, 2, 3, 4, and 5 to place the protein creation steps below in the correct order. Ribosome attaches to the mRNA.

kirza4 [7]

Answer: The correct sequence for the protein creation is as follows-

1) Information is transcribed in DNA to mRNA.

2) mRNA leaves the nucleus.

3) Ribosome attaches to the mRNA.

4) tRNA anticodon carries an amino acid that compliments the mRNA codon.

5) The chain of amino acids forms a protein.

According to the Central Dogma, the genetic information is transferred from DNA to mRNA to Proteins.

The first step is transcription in which DNA is converted to mRNA with the help of enzyme RNA polymerase. In eukaryotic cells, this process occurs in the nucleus.

This is followed by translation, which takes place in the cytoplasm when mRNA leaves the nucleus.

Ribosomes are the specialized organelles, which act as the site for protein synthesis ( translation).

Ribosomes attach to the mRNA. tRNA brings amino acid, which has anticodon complementary to the codon present in the mRNA. A chain of amino acids is thus synthesized, which is called Protein.

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