Q. No.Examine the figure given below and select the part correctly matched with its function/structure
1.
Part (A) : Ribosome-made up of 30S and 50S subunits
2.
Part (C) : RER - principally performs the function of packaging materials
3.
Part (D) : Nuclear pore - passage through which movement of RNA takes pace in one direction only
4.
Part (B) : SER - synthesis of steroidal hormones
Which of the following statements are correct?
| a. | The rough endoplasmic reticulum is frequently observed in the cells actively involved in protein synthesis. |
| b. | Proteins that are to be used outside the cell are synthesized on free ribosomes. |
| c. | In the eukaryotic cell there is an extensive compartmentalization of cytoplasm through the presence of membrane-bound organelles |
| d. | ER is found prominently in human eggs and sperms. |
1. All are correct
2. b & d
3. a, b & d
4. a & c
Chromatin contains
| 1. | DNA, histone protein, basic non-histone protein, dsRNA |
| 2. | DNA, basic histone protein, non-histone protein, RNA |
| 3. | DNA, acidic histone protein, basic non-histone protein, RNA |
| 4. | DNA, acidic histone protein, non-histone protein, dsRNA |
Identify the cell organelles labelled as A, B, C and D. Mark the correct option with respect to organelle and its function.
| 1. | A - Major site for synthesis of lipid. |
| 2. | B - Performs the function of packaging materials, to be delivered to only intracellular targets. |
| 3. | C - Sites of anaerobic respiration. |
| 4. | D - Main arena of cellular activities |
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 |
Bacterial flagellum is composed of
| 1. | Basal body, axoneme and centrosome |
| 2. | Basal body, hook and filament |
| 3. | Axoneme, basal body and tubulin protein |
| 4. | Centriole, hook and axoneme |
Mark the incorrect statement related to cell wall
| (a) | Non-living rigid structure |
| (b) | Present in fungi and plants |
| (c) | Provides barriers to undesirable macromolecules |
| (d) | Primary wall is capable of growth |
| (e) | Primary wall gradually diminishes as the cells matures |
1. a, b, d
2. d only
3. c, d
4. All statements are correct
ER, Golgi complex, lysosomes and vacuoles are included in endomembrane system because :-
| 1. | Their function are similar |
| 2. | Their structure are same |
| 3. | Their function are co-ordinated |
| 4. | Golgi complex, lysosomes and vacuoles are originated from the ER |
Which of the following cell organelle is absent in prokaryotic cell?
1. Ribosome
2. Lysosome
3. Mitochondria
4. 2 and 3 both
Eukaryotic cells 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 |
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