Question

The chromatin material is formed of
A.DNA only
B.DNA and Histones
C.Histones only
D.Nucleotides

Answer 1

Chromatin is a substance within a chromosome whose primary function is to package the long DNA molecules into a more compact and denser form.

Complete answer:
Chromatin packaging of DNA prevents the strands of DNA from being tangled and reinforce the DNA during cell division preventing DNA damage and regulating egen expression and replication of DNA. During the process of meiosis and mitosis, chromatin helps in proper segregation of chromosomes during anaphase. The characteristic shape of the DNA during the anaphase stage of the cell cycle is due to the reason that DNA is being coiled by chromatin in a highly condensed form. Let us analyze the options to find out the correct option.

Option A: DNA is coiled with special protein to form the chromatin. They are not present alone to form the chromatin structure. Therefore, this is the incorrect option.

Option B: DNA and histones associate with one another to form the chromatin structure. Chromatin packs up the DNA in the form of chromosomes with the help of histone proteins. Therefore, this is the correct option.

Option C: Histones proteins bind to the DNA and function as anchors but they alone do not form the chromatin. Therefore, this is the incorrect option.

Option D: Nucleotides make up the DNA as they are the building blocks of the DNA. however, they do not form the chromatin structure which condenses the DNA. Therefore, this is the incorrect option.

Hence, the correct answer is option (B)

Note: Histone are adaptor proteins that provide structural support to the DNA. They wrap around the DNA to form a complex structure giving the chromosome a more compact shape.