Question

1) what is the difference between chromatin, chromatid and chromosomes ?
2) what is meant by DNA packaging protein synthesis in the G1 phase ?
3) if a cell enters G0 phase where it is said to be metabolically active but undergoes no division, will it ever come out of it or will it remain in G0 phase forever?
4) when does G0 phase occur? Is it only after G2 phase ?

Answer 1

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✔Ans = There are three stages of cellular interphase, with each phase ending when a cellular checkpoint checks the accuracy of the stage's completion before proceeding to the next. The stages of interphase are:

G1 (Gap 1), in which the cell grows and functions normally. During this time, a high amount of protein synthesis occurs and the cell grows (to about double its original size) – more organelles are produced and the volume of the cytoplasm increases. If the cell is not to divide again, it will enter G0.

In the cell cycle, interphase is preceded by telophase and cytokinesis of the M phase. In alternative fashion, interphase is sometimes interrupted by G0 phase, which, in some circumstances, may then end and be followed by the remaining stages of interphase. After the successful completion of the G2checkpoint, the final checkpoint in interphase, the cell proceeds to prophase, or in plants to preprophase, which is the first stage of mitosis.

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Answer 2

Hey mate ^_^

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Answer:
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1) Chromatin is a long chain of DNA. 
Chromosomes is rolled up DNA when it is going through cell division.
Sister chromatids are the branches of the same chromosome.

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