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  4. DNA and histone proteins are synthesized during the following phase of cell cycle :

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Q. DNA and histone proteins are synthesized during the following phase of cell cycle :

Delhi UMET/DPMTDelhi UMET/DPMT 2004

Solution:

The period occupied by a cell between cytokinesis and the beginning of next prophase is known as interphase. The interphase is divided into $ G_{1} $ -phase, S-phase and $ G_{2} $ - phase. During $ G_{1} $ -phase synthesis of protein and RNA required for DNA replication takes place. During S-phase DNA and histones are synthesized and each chromosome replicate into two chromatids. During $ G_{2} $ - phase synthesis of RNA and protein continue i.e., cell prepare for M-phase.