CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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only during interphase
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only when they are being replicated
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only during cell division (mitosis)
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only during the G1 phase
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Detailed explanation-1: -During metaphase, the nucleus dissolves and the cell’s chromosomes condense and move together, aligning in the center of the dividing cell. At this stage, the chromosomes are distinguishable when viewed through a microscope.
Detailed explanation-2: -During most of the cell cycle, interphase, the chromosomes are somewhat less condensed and are not visible as individual objects under the light microscope. However during cell division, mitosis, the chromosomes become highly condensed and are then visible as dark distinct bodies within the nuclei of cells.
Detailed explanation-3: -Chromosomes are found in the nucleus of every cell of our body and are made up of DNA, tightly coiled around proteins. We have 23 pairs of chromosomes altogether, and they can only be easily observed during cell division.
Detailed explanation-4: -In metaphase, the chromosomes are clearly visible and each chromosome has two chromatids. Hence, the morphology of chromosomes can be best studied during metaphase.
Detailed explanation-5: -During interphase, individual chromosomes are not visible, and the chromatin appears diffuse and unorganized.