CELL DIVISION
THE CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Chromatids
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Nucleus
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DNA
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Detailed explanation-1: -In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.
Detailed explanation-2: -Chromosomes are bundles of tightly coiled DNA located within the nucleus of almost every cell in our body.
Detailed explanation-3: -Each chromosome within a cell has its own strand of DNA. So with 23 pairs of human chromosomes, every human cell should host 46 strands of DNA-each wrapped around hundreds of thousands of histones. This tight coiling helps the body to pack its long DNA molecules into very tiny spaces.
Detailed explanation-4: -It is this coiled structure that ensures the proper segregation of the chromosomes during cell division. During other phases of the cell cycle, DNA is not coiled into chromosomes.
Detailed explanation-5: -A chromosome is made up of proteins and DNA organized into genes. Each cell normally contains 23 pairs of chromosomes.