Question

Nuclear membrane disappears during

• A. Metaphase
• B. Early prophase
• C. Late prophase
• D. Mid prophase

Answer 1

Answer: (C)

Late prophase

A unique feature of the nucleus is that it disassembles and re-forms each time most cells divide. At the beginning of mitosis, the chromosomes condense, the nucleolus disappears, and the nuclear envelope breaks down, resulting in the release of most of the contents of the nucleus into the cytoplasm. In most cells, the disassembly of the nuclear envelope marks the end of the prophase of mitosis. So, the correct answer is C.