The substitution of one or more bases of DNA is called:
Correct answer: B. Point mutation
- A. Insertion
- B. Point mutation
- C. Deletion
- D. Transposition
Explanation
A point mutation refers to the substitution, insertion, or deletion of a single nucleotide base (or a few bases) in a DNA sequence. When only one base pair is altered, it's specifically referred to as a point mutation. This type of mutation can have various effects, ranging from no observable impact to significant changes in the resulting protein sequence or gene function.
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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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