Chapter 1

Question 1

There are how many genes in human genome?

Answer 1

There are approx. 23000 genes in the human genome which represents only one fifth of the no. 100,000 predicted prior to completion of human genome project.

Question 2

What is chromatin ?

Answer 2

A complex of DNA and proteins (mostly histones) in which genes are contained.

Question 3

What is the basic unit of chromatin ?

Answer 3

The nucleosome

Question 4

What is nucleosome?

Answer 4

Basic unit of chromatin. Each nucleosome is composed of an octamer of histone proteins and approximately 140 base pairs of dna