Question

when a nitrogenous base is eliminated from the sequence it is known as which type of mutation?
duplication
deletion
frameshift
insertion
substittion

Explanation:

1. Deletion: A deletion mutation occurs when one or more nitrogenous bases are removed (eliminated) from a DNA or RNA sequence. So this option is correct.
2. Frameshift: A frameshift mutation can be caused by the insertion or deletion of a number of nucleotides that is not a multiple of three. Since the elimination of a nitrogenous base (a type of deletion) can cause a frameshift (if the number of bases deleted is not a multiple of three), this is also correct.

• Duplication involves copying a segment, not elimination.
• Insertion is adding bases, not eliminating.
• Substitution is replacing one base with another, not eliminating.

Answer:

B. Deletion, C. Frameshift