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Cell Cycle And Cell Division

Question
CBSEENBI11026090
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DNA/chromosome replication takes place during:

  • G1- phase

  • G2- phase

  • S- phase

  • Prophase

Solution

C.

S- phase

Replication of DNA and synthesis of histone protein takes place during S- phase. At the end of S phase, each chromosome has two DNA molecules, i.e., a duplicate set of genes.

Some More Questions From Cell Cycle and Cell Division Chapter

Name the process in which there is an exchange of genetic material between non-sister chromatids of homologous chromsomes during meiosis.

What is polyteny ?

 Namethe five phases of of Prophase I.

 What are two types of cells on the basis of presence or absence of nucleus ?

Name an important event that occurs during meiosis and not during mitosis.

Name a cell that has half the number of chromosomes. Name the process responsible for the reduced number.

Name the sub-stage of meiosis in which crossing over takes place.

At which stage of mitosis, the two chromatids of each chromosome separate and move towards opposite poles.

Name the cell division which is responsible for growth and healing of wounds.

What type of cell division can produce variations ?

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