THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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so that the spindle fibers can be synthesized
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so that the microtubules can attach to centromeres
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so that the cytoplasm can divide
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so that the chromosomes can condense
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Detailed explanation-1: -Nuclear membrane starts disappearing at the start of mitosis and by the late prophase it disappears completely along with the major cell organelles. The nuclear membrane disappears presumably to allow more space for karyokinesis and proper separation of chromatids.
Detailed explanation-2: -Answer and Explanation: During mitosis, the nuclear envelope breaks down during prophase. Since mitosis requires separating DNA equally into two cells the nucleus that contains the DNA must be disassembled. This happens during the first stage of mitosis, prophase.
Detailed explanation-3: -Why do you think it is necessary to disintegrate the nuclear membrane during mitosis? The nuclear membrane must be temporarily removed so the chromosomes can be divided into the two cells.
Detailed explanation-4: -During mitosis, the nuclear envelope disintegrates and the chromosomes (shown in red) line up in the metaphase plate. The chromosomes are pulled apart and the cell starts to divide. During the early stages, individual tubules of the endoplasmatic reticulum (ER; shown in green) bind directly to chromatin.