A chromosome consists of
A)mostly protein and RNA with a small amount of DNA.
B)mostly DNA and proteins with a small amount of RNA.
C)about equal proportions of DNA,RNA,and protein.
D)DNA only.

Question

Quizplus · Accepted Answer

A chromosome primarily consists of DNA molecules tightly coiled around histone proteins, which together form chromatin. This chromatin fiber is responsible for the organization and packaging of genetic information inside the nucleus. The proteins thus constitute the majority of the weight of chromosomes, whereas DNA is the main component of the genetic material. RNA molecules also associate with chromatin but in considerably smaller amounts. Therefore, option (B) is the best choice because chromosomes are mostly made up of DNA and proteins, with a smaller amount of RNA.

A Chromosome Consists of