CELL STRUCTURES AND FUNCTION
CELL DIVISION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which molecule is synthesized during the S phase?
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carbohydrates
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DNA
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lipids
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proteins
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Explanation:
Detailed explanation-1: -DNA and histone synthesis are both triggered at the beginning of S phase by cyclin/cdk2 activity.
Detailed explanation-2: -During the S phase, DNA is synthesized in the process of DNA replication.
Detailed explanation-3: -In the eukaryotic cell cycle, chromosome duplication occurs during “S phase” (the phase of DNA synthesis) and chromosome segregation occurs during “M phase” (the mitosis phase).
Detailed explanation-4: -During S phase of the eukaryotic cell division cycle, newly replicated DNA is rapidly assembled into chromatin. Newly synthesised histones form complexes with chromatin assembly factors, mediating their deposition onto nascent DNA and their assembly into nucleosomes.
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