True or false A selective force such as antibiotics must be

True or false: A selective force (such as antibiotics) must be present for DNA mutations to occur.

Solution

Answer: False

Reason:

Selective forces are not going to exert any impact on the alterations of genome mainly via causing DNA mutations. For example, antibiotics are going to cause change in the RNA structure or change in enzyme moieties inside the cells of microbial species result in inhibition of growth without causing damage or random change (mutation) in the DNA. Natural selection always trying to eliminate any deleterious alleles in the host cells but do not cause any selective DNA mutation when taking antibiotics