Question

in eukaryotic cells, dna is packaged with proteins into structures called chromosomes. what role do chromosomes provide the cell?
a. they allow all genes to be expressed at the same time.
b. they allow random distribution of genetic material when a cell divides.
c. they ensure equal division of genetic material when a cell divides.
d. they eliminate the need for a nuclear membrane.

Explanation:

• Option A: Not all genes are expressed simultaneously. Gene expression is regulated.
• Option B: Chromosomes do not allow random distribution of genetic material. There is a precise mechanism.
• Option C: Chromosomes ensure that during cell division (mitosis or meiosis), genetic material is divided equally. This is crucial for maintaining the correct genetic complement in daughter cells.
• Option D: Eukaryotic cells have a nuclear membrane, and chromosomes do not eliminate the need for it.

Answer:

C. They ensure equal division of genetic material when a cell divides.