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Q. No.Which of the following statements about plasmids in prokaryotic cells is correct?
| 1. | Plasmids are essential for the survival of bacteria under normal conditions. |
| 2. | Plasmids encode proteins that aid in photosynthesis. |
| 3. | Plasmids carry non-essential genes that confer advantages such as antibiotic resistance. |
| 4. | Plasmids are linear DNA molecules found in the cytoplasm. |
Subtopic: Â Cell Organisation |Â Prokaryotic Cell Organisation |
 83%
Level 1: 80%+
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What will be true for both erythrocytes of many mammals and sieve tube cells of vascular plants?
| 1. | They are not considered as living cells. |
| 2. | They do not contain a nucleus at maturity. |
| 3. | They divide continuously to produce new cells. |
| 4. | They are fragments of larger cells present in early embryonic stages. |
Subtopic: Â Cell Organisation |
 90%
Level 1: 80%+
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Which of the following statements with respect to Endoplasmic Reticulum is incorrect?
| 1. | SER are the sites for lipid synthesis |
| 2. | RER has ribosomes attached to ER |
| 3. | SER is devoid or ribosomes |
| 4. | In prokaryotes only RER are present |
Subtopic: Â Cell Organisation |Â Endomembrane System (Endoplasmic Reticulum) |
 89%
Level 1: 80%+
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Thin, amorphous, and cementing layer between two adjacent cells, is
| 1. | Primary wall | 2. | Middle lamella |
| 3. | Secondary wall | 4. | Plasma membrane |
Subtopic: Â Cell Organisation |Â Cell Wall |Â Cell Membrane |
 88%
Level 1: 80%+
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A single human somatic cell has approximately:
| 1. | two metre long thread of DNA distributed among its forty six chromosomes. |
| 2. | two metre long thread of DNA distributed among its twenty three chromosomes. |
| 3. | one metre long thread of DNA distributed among its forty six chromosomes. |
| 4. | one metre long thread of DNA distributed among its twenty three chromosomes. |
Subtopic: Â Cell Organisation |
 86%
Level 1: 80%+
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State the following statements as true (T) or false (F) and select the correct option.
| A. | Integral proteins are partially or totally buried in the membrane. |
| B. | Human RBC membrane has approximately 52% proteins. |
| C. | Proteins move laterally within overall bilayer of membrane. |
| A | B | C | |
| 1. | T | T | T |
| 2. | F | T | F |
| 3. | T | F | T |
| 4. | F | F | T |
Subtopic: Â Cell Organisation |Â Cell Membrane |Â Evidence for Fluidic Nature of Membrane |
 85%
Level 1: 80%+
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Eukaryotic cells are considered as more efficient than prokaryotic cells, due to
| 1. | compartmentalisation of cytoplasm |
| 2. | infolding of membrane |
| 3. | presence of cell wall |
| 4. | aerobic respiration |
Subtopic: Â Cell Organisation |Â Prokaryotic Cell Organisation |
 82%
Level 1: 80%+
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Q. No.
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