Question

Which of the following statements about differentiated cells is true?

a)Cells of distinct types express nonoverlapping sets of transcription factors.

a) Cells of distinct types express nonoverlapping sets of transcription factors.
b) Once a cell has differentiated, it can no longer change its gene expression.
c) Once a cell has differentiated, it will no longer need to transcribe RNA.
d) Some of the proteins found in differentiated cells are found in all cells of a multicellular organism.

Answer 1

The correct statement regarding differentiated cells is that some proteins are common to all cells in an organism. Differentiated cells have unique gene expression profiles due to regulatory transcription factors, and they continue to transcribe RNA for their functions. The correct option is d) Some of the proteins found in differentiated cells are found in all cells of a multicellular organism.

Step-by-step explanation:

The statement about differentiated cells that is true is 'd) Some of the proteins found in differentiated cells are found in all cells of a multicellular organism.'

All cells in a multicellular eukaryotic organism contain the same DNA (genes), but they express different sets of genes. This gene expression is regulated by transcription factors, which are proteins that bind to DNA to either promote or inhibit the transcription of genes.

These factors are crucial in the process of cell differentiation, where a cell specializes and assumes a unique structure and function. Even after differentiation, cells continue to transcribe RNA as needed to perform their specialized functions, and they can modify their gene expression in response to changes or signals. The correct option is d) Some of the proteins found in differentiated cells are found in all cells of a multicellular organism.