Ultraviolet light can damage a DNA strand causing:
Ans. B. Two adjacent pyrimidine residues to form covalently bonded dimerDamage to DNA during its replication can occur from ultra violet irradiations that causes thymine dimer formation.
Two adjacent purine residue to form a covalently bounded dimer
Two adjacent pyrimidine residues to form covalently bonded dimer
Disruption of phosphodiesterase linkage
Disruption of non-covalent linkage
Molecular Genetics