Fill in the blanks:

1. Chromatin fibre is made up of DNA and …………… .
2. The two sister chromatids of a chromosome are attached to each other at …………… .
3. The structure of DNA was first discovered by…………… .
4. The three components of a nucleotide are …………… and …………… .
5. DNA strand wound around a histone octamer forms a complex called a …………… .
6. A specific sequence of nucleotides on a chromosome constitutes a …………… .

The chromatin material is formed of

1. DNA only
2. DNA and Histones
3. Histones only
4. Nucleotides

The number of chromosomes in a certain type of cell division is halved. This kind of cell division occurs in

1. only testis
2. only ovary
3. both ovary and testis
4. all body cells

Synthesis phase in the cell cycle is called so for the synthesis of more of

1. RNA
2. RNA and proteins
3. DNA
4. Glucose