Q. No.Which organelle is extensive and continuous with the outer membrane of the nucleus?
1. Golgi complex
2. ER
3. Vacuole
4. Lysosome
A nuclear pore allows
| 1. | Unidirectional movement of DNA |
| 2. | RNA movement only |
| 3. | RNA and protein movement |
| 4. | Protein movement only |
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
The given diagram represents the four different structures which one of these is correct containing material and function:-
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a. |
Nucleolus |
NOR |
Synthesis of rRNA for formation of 80 S Ribosome |
|
b. |
Nuclear Pore |
Chromatin |
Exchange material between cytoplasm and nucleoplasm |
|
c. |
Nucleoplasm Protein |
Nucleoplasmin |
Formation of nuclear matrix |
|
d. |
Nuclear membrane |
Ribosome |
Cellulose synthesis |
1. A
2. B
3. C
4. D
Non-membranous nucleoplasmic structures in the nucleus, are the sites for active synthesis of:
| 1. | protein | 2. | mRNA |
| 3. | rRNA | 4. | tRNA |
The content of the nucleolus is continuous with nucleoplasm
| 1. | Through microtubules |
| 2. | Through nuclear pores |
| 3. | Due to lack of membrane |
| 4. | Due to presence of channels in membrane |
The spherical structures present in the nucleoplasm
| 1. | Has contents continuous with the rest of the nucleoplasm. |
| 2. | Is a membrane bound structure |
| 3. | Is a site of active messenger RNA synthesis |
| 4. | Are smaller and more numerous in cells actively carrying out protein synthesis |
Read the statements carefully and select the set of correct statements
| a. | Palade particles are found in all cellular organisms |
| b. | A membrane bound structure in nucleus is the site of ribosomal RNA synthesis |
| c. | The mitochondria can divide meiotically to produce daughter mitochondria |
| d. | Vacuoles can occupy about 90% of the volume of a plant cell |
1. All except b
2. a & c
3. b & d
4. a & d
Find the incorrect statement:
| 1. | Plastids found in plant cells and in euglenoids. |
| 2. | Golgi apparatus is site of formation of glycoproteins and glycolipids. |
| 3. | Nucleus during interphase has highly extended and elaborate nucleoprotein fibers. |
| 4. | Centriole Microtubular organization is referred to as the 9 + 2 and it forms basal body of cilia and flagella. |
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