Question

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

Answer 1

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.

Answer 2

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