CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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material used to form the cell membrane
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tightly wound DNA that is ready for cell division
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long, stretched out strands of DNA
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molecules that form the sex cells
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Detailed explanation-1: -Chromosomes are coiled structures made of DNA and proteins. Chromosomes are the form of the genetic material of a cell during cell division. It is this coiled structure that ensures the proper segregation of the chromosomes during cell division.
Detailed explanation-2: -Condensed DNA is found in a tightly packed area of chromatin called heterochromatin. Its transcription is dormant. The transcriptionally active portion of chromatin is called euchromatin, which is loosely packed.
Detailed explanation-3: -This is accomplished by wrapping the DNA around structural histone proteins, which act as scaffolding for the DNA to be coiled around. The entire structure is called a nucleosome, each of which includes an octamer of histone proteins and 146 to 147 base pairs of DNA.
Detailed explanation-4: -DNA is a working molecule; it must be replicated (copied) when a cell is ready to divide, and it must be “read” to produce the molecules, such as proteins, to carry out the functions of the cell. For this reason, the DNA is protected and packaged in very specific ways.