Hammerling's experiments on Acetabularia involved exchanging
1. Cytoplasm
2. Nucleus
3. Rhizoid and stalk
4. Gametes

The outer membrane of the nucleus:

I. is continuous with the Endoplasmic reticulum

II. does not bear ribosomes.

1. Only I is correct

2. Only II is correct

3. Both I and II are correct

4. Both I and II are incorrect

Ribosomes are produced in

1. Nucleolus

2. Mitochondria

3. Cytoplasm

4. Golgibody

Nuclear envelope is derivative of 

Ribosomal RNA is actively synthesized in

1. lysosomes

2. nucleolus

3. nucleoplasm

4. ribosomes

Through the nuclear pore the movement of _____and ______takes place

Nucleus is absent in

1. erythrocytes of mammals

2. sieve tube cells of Vascular plants

3. Both A and B

4. Companion cells of vascular bundle

Which of the following is true about nucleolus?

(1)membrane less structure

(2)active site for rRNA synthesis

(3)numerous in cells which are involved in protein synthesis

(4)All of the above

A nuclear pore allows

The content of nucleolus is continuous with nucleoplasm