Question

Choose the best option out of the four alternatives
and
The chromatin material is formed of
a DNA only
(b) DNA and Histones
a) Histones only
(d) Nucleotide
The term "chromosomes" literally means
(a) Inherited bodies
(b) Twisted threads
c) Coloured bodies
(d) Shining threads
The number of chromosomes in a certain type of
cell division is halved. This kind of cell division
occurs in
(a) only testis
(b) only ovary
o both ovary and testis (d) all body cells
In which one of the following options the stages of
mitosis have been given in correct sequence ?
ta) Prophase, metaphase, telophase, anaphase
(b) Prophese metaphase, anaphase, telophase
(a) Anaphase, telophase, prophase, metaphase
(d) Telophase, anaphase, prophese, metaphase
5. Synthesis phase in the cell cycle is called so for the
synthesis of more of
(b) RNA and proteins
d) DNA
(d) Glucose
(a) RNA​

Answer 1

Answer:

1) (b)DNA and histones

2) (c) coloured bodies

3)(d)all body cells

4)(b)prophase,metaphase,anaphase,telophase

5)d)DNA

Answer 2

Answer:

1)b 2)C 3)O 4)b 5)d

Explanation:

The nucleoplasm contains fine thread like,coiled and much elongated structure called chromatin fibre.

And in it the DNA (deoxyribonucleic Acid ) and Histone which is a protein are packed .

Their packing gives two types of chromatin fibre

1) Hetero chromatin : it contains less amount of DNA

2) Euchromatin: It contains more amount of DNA

It means the Euchromatin is metabolically and genetically active.

2) It is clear in the no.2 it means the coloured bodies

3) it is the miosis cell division in which the mature mother cell divides in such a way that the no of chromosomes is just half in the daughter cells as compared to the mother cells . actually it also occurs in two phases

I. Miosis first when chromosomal number is kept half so known as reductional cell division.

II. The miosis ii follows the process of mitosis division

in the given condition the Germinal epithelium divides and forms the cells which first undergo mitotic division then grows and only undergoes miosis division and forms gamates. but in other body cells the mitotic division occurs

4) it is quiet clear that the cell division follows Prophase ,Metaphase,Anaphase and Telophase

5)In this stage the DNA is duplicated into exact copies.