Question

Which of these is a correct type of mutation​

Answer 1

Answer:

There are three types of DNA Mutations: base substitutions, deletions and insertions. Single base substitutions are called point mutations, recall the point mutation Glu -----> Val which causes sickle-cell disease. Point mutations are the most common type of mutation and there are two types.

Answer 2

Answer:

Mutations that can occur during replication and / or recombination are permanent changes in the nucleotide sequence of DNA.

Damaged DNA can be mutated by either base pair substitution, deletion, or insertion.

Mutations are almost harmless unless they lead to cell death or tumorigenesis.

Due to the deadly potential of DNA mutations, cells have evolved mechanisms to repair damaged DNA.

Base substitutions, deletions and insertions are 3 sorts of DNA Mutations.

In very rare cases, DNA polymerase incorporates non-complementary bases into the daughter strand. In the next round of replication, the misincorporated base causes the mutation. However, this is extremely rare because exonucleases act as a calibration mechanism that recognizes and cuts out mismatched base pairs.

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