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 ?

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Solution

The solutions to 1, 2 queries have been provided below:

1.
Chromatin is a mix of DNA and proteins present in a nucleus in a non-condensed state (non coiled form).
Chromatids are the arms of the chromosome joined by centromere at centre.
Chromosomes are the the highly coiled form of DNA and proteins present in the nucleus.

2. The DNA packaging means that DNA which is spread in the nucleus is assembled together to prepare for replication. The protein synthesis occurs during G₁ phase which are needed by the cell for the S phase for replication of DNA and other processes.

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