Chromatin

Q. Heterochromatin differs from euchromatin in:

1. Chemical nature
2. Degree of staining
3. Activeness of genes
4. (b) and (c)

Q.

Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with Components.

(i) Cristae of mitochondria

(ii) Inner membrane of mitochondrion

(iii) Cytoplasm

(iv) SER

(v) RER

(vi) Mitochondrial matrix

(vii) Cell vacuole

(viii) Nucleus

The correct components are

A B C D

1. (i) (iv)(viii) (vi)

2. (v) (iv)(viii) (iii)

3. (v) (i) (iii) (ii)

4. (vi) (v) (iv) (vii)

Q.

Chromosomes which have definite role in sex determination are

1. Allosome

2. All chromsomes play role in sex determination.

3. Autosome

4. None of the above

Q.

active synthesis of RNA takes in which part of the cell?

Q.

Aster formation can take place only when

1. Centromere is present

2. Centromere is absent

3. Chromosome is present

4. Centriole is present

Q. Assertion: Eukaryotic cells have more DNA than prokaryotic cells.
Reason: Eukaryotic cells are genetically more complex than prokaryotic cells.

1. Both the assertion and reason are true and the reason is the correct explanation for assertion.
2. Both the assertion and reason are true and the reason is not the correct explanation for assertion.
3. If the assertion is true but the reason is false.
4. Both the reason and assertion are false.