MCQ
The function of nucleolus is the synthesis of
- A$DNA$
- B$m-RNA$
- ✓$r-RNA$
- D$t-RNA$
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| Compound | Function |
| $2,4-D$ | $A$ |
| $B$ | Fruit ripening |
Reason : Oxygen started accumulating in the atmosphere after the non-cyclic pathway of photosynthesis evolved.