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Question
Which of the following is correct?
Options
Cells of all living organisms have a nucleus.
Both animal and plant cells have a well-defined cell wall.
In prokaryotes, there are no membrane-bound organelles.
Cells are formed de novo from abiotic materials.
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Solution
In prokaryotes, there are no membrane-bound organelles.
Explanation:
- The nucleus is absent from mature mammalian erythrocytes and the sieve tube cells of vascular plants.
- Animals only have cell membranes; they do not have cell walls.
- Prokaryotes are unicellular creatures devoid of other membrane-bound organelles and a nucleus. Every cell is derived from an earlier cell.
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Match List I with List II -
| List-I | List-II |
| A. Nucleolus | I. Site of formation of glycolipid |
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| C. Leucoplasts | III. Site for active ribosomal RNA synthesis |
| D. Golgi apparatus | IV. For storing nutrients |
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