how does bactericidal uV inhibit the growth of bacteriaSolut

how does bactericidal uV inhibit the growth of bacteria?

Solution

Mutation causes change in the seqence of DNA base . Mutation occure naturlly in bateria is very slow . But the rate of mutation increase in the presence of mutagen .

Mutagenic radition are of two types ionizing radiation and non ionizing radiation . uV light is non ionizing radiation exert its mutagenic effect by exciting electron in molecules .The exciting of electron in DNA molecule results in formation of extra bonds between adjacent pyramidines specialky in thymine in DNA. The boundation of two pyrimidines is called pyrimidine dimer . These dimer change 5he shape of DNA and can causes problems during replication .