EMBRYOLOGY
CHROMOSOMES AND CELL DIVISIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which best describes chromosomes?
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They carry out respiration.
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They consist mostly of chlorophyll.
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Their structure is only visible during interphase.
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They consist of tightly coiled strands of DNA and proteins.
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Explanation:
Detailed explanation-1: -So the correct answer to this question is (B). A chromosome is a threadlike structure of tightly coiled DNA that contains many genes.
Detailed explanation-2: -A single length of DNA is wrapped many times around lots of proteins? called histones, to form structures called nucleosomes. These nucleosomes then coil up tightly to create chromatin loops. The chromatin loops are then wrapped around each other to make a full chromosome.
Detailed explanation-3: -Chromosomes are made up of a DNA-protein complex called chromatin that is organized into subunits called nucleosomes.
There is 1 question to complete.