Question

what is the composition of chromosomes? where are they present in the cell?

Answer 1

chromosomes are made up of DNA.

Answer 2

$\huge\underline\mathfrak\color{blue}Answer$

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Chromosomes are thread-like structures located inside the nucleus of animal and plant cells.