science
Grade-10
Easy

Question

Mutation occurs at the time of:

  1. Cell division.

  2. DNA repair.

  3. RNA transcription.

  4. DNA replication.

hintHint:

The process of formation of two daughter cells.

The correct answer is:

Cell division.


    • When the normal sequence of the genetic material is altered, the phenomenon is called mutation
    • Cell division is the process of producing daughter cells
    • During cell division, the contents of the cytoplasm and nucleus multiply
    • Inside the nucleus, the DNA will undergo replication
    • During replication, errors that occur will be removed by "proof reading mechanism" present in cells
    • Failure of this mechanism or due to environmental factors the normal sequence of nucleic acid changes 

    • Mutation can be due to genetic or environmental factors
    • The cause of mutation is called mutagen
    • The individual affected is called mutant
    • Not all mutations are harmful

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