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Q. No.A nuclear pore allows
| 1. | Unidirectional movement of DNA |
| 2. | RNA movement only |
| 3. | RNA and protein movement |
| 4. | Protein movement only |
Subtopic: Â Nucleus |
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Level 1: 80%+
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What structural feature of the nuclear envelope facilitates the movement of RNA and proteins between the nucleus and cytoplasm?
| 1. | Ribosomes attached to the outer membrane |
| 2. | The double membrane of the nuclear envelope |
| 3. | The nucleoplasm inside the nuclear envelope |
| 4. | Nuclear pores formed by the fusion of two membranes |
Subtopic: Â Nucleus |
 90%
Level 1: 80%+
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Secondary constriction is
| 1. | Non staining region of chromosome |
| 2. | Also called centromere |
| 3. | Found in all chromosomes |
| 4. | Seen in humans only |
Subtopic: Â Nucleus |Â Nucleus: Chromosomes |
 89%
Level 1: 80%+
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Which one of the following cellular parts is correctly described?
| 1. | Thylakoids-flattened membranous sacs forming the grana of chloroplasts |
| 2. | Centrioles - sites for active RNA synthesis |
| 3. | Ribosomes-those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S) |
| 4. | Lysosomes-optimally active at a pH of about 8.5 |
Subtopic: Â Plastids |Â Lysosomes |Â Nucleus |
 86%
Level 1: 80%+
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Which of the following is an incorrect statement?
| 1. | The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm. |
| 2. | Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm. |
| 3. | Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles. |
| 4. | Microbodies are present both in plant and animal cells. |
Subtopic: Â Nucleus |
 85%
Level 1: 80%+
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- 1(current)
Q. No.
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