MCQ
Which event does not occur during prophase in an animal cell:
- ANuclear envelope disperses
- BChromosomes replicate
- CSpindle begins to form
- DChromosomes condense
Explanation:
The prophase is the first phase of mitosis or cell division.
In the prophase, the nuclear membrane disappears.
It is followed by the initiation of condensation of the thread chromatid material into chromosomes.
The spindle fibres begin to appear.
In the metaphase, the chromosomes then align at the equatorial plane with their centromeres on the spindle fibres.
DNA replication takes place in the S phase of the interphase.
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| Column$-I$ | Column$-II$ |
| $(a). Br$ | $(i)$ Corolla |
| $(b). K$ | $(ii)$ Perianth |
| $(c). C$ | $(iii)$ Calyx |
| $(d). P$ | $(iv)$ Bracteate |

$(I)$ Formation bipolar spindle
$(II)$ Formation of lysosome
$(III)$ Formation of mesosome
$(IV)$ Formation of ribosome