Q2 of 33 Page 10

The term “Chromosomes” literally means

Chromosomes are thread like structure which is composed of DNA and protein. DNA molecules contain the information necessary for constructing and organizing cells. Functional segments of DNA are called genes.

The term “Chromosomes” literally means coloured body (chrom; colour, soma; body).

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1

Fill in the blanks:

(i) Chromatin fibre is made up of DNA and ………………………….


(ii) The chromatids are attached to each other at ………………………….


(iii) DNA replicates in the ..………………………………... of the cell cycle.


(iv) Who first discovered the structure of DNA? ………………………….

 1

The chromatin material is formed of

 1

Name the following:

The repeating components of each DNA strand lengthwise.

 1

Name the following:

The complex structure consisting of DNA strand and a core of histones.