Process of uncontrolled cell division is due to which one of the following reasons?
Correct answer: B. Mutations
- A. DNA replication
- B. Mutations
- C. Translation
- D. Transcription
Explanation
Option A: DNA replication is the process by which DNA is copied in preparation for cell division. Mutations can occur during DNA replication if there is an error in the copying process. These errors can be caused by environmental factors, such as exposure to radiation or chemicals, or they can be inherited from parents. Option B: The process of uncontrolled cell division is due to mutations in the DNA. Mutations are changes in the DNA sequence that can occur during DNA replication. These changes can lead to the production of proteins that malfunction, which can disrupt the cell cycle and cause cells to divide uncontrollably. This is because mutations can occur in any cell, and they can be passed on to daughter cells. As a result, mutations can accumulate over time and lead to the development of cancer. Option C: Translation is the process by which RNA is used to produce proteins. If there is an error in translation, it can lead to the production of a protein that malfunctions. This can also disrupt the cell cycle and cause cells to divide uncontrollably. Option D: Mutations can also occur during transcription, which is the process by which DNA is used to produce RNA. RNA is then used to produce proteins. If there is an error in transcription, it can lead to the production of a protein that malfunctions. This can also disrupt the cell cycle and cause cells to divide uncontrollably.
This question appeared on the NUMS 2018 paper, which you can sit online with every answer explained.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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