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प्रश्न
Which of the following is correct?
विकल्प
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.
MCQ
उत्तर
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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