Question

dna photolyase is a light-sensitive enzyme able to repair dna damaged by ultraviolet radiation.

true or false

true
false

Explanation:

Analyze the function of DNA photolyase

DNA photolyase is a flavoprotein enzyme that binds specifically to ultraviolet (UV)-induced DNA damage, such as cyclobutane pyrimidine dimers (CPDs).

Evaluate the light-dependency of the enzyme

The enzyme uses the energy of absorbed blue/UV-A light (wavelengths 300–500 nm) to catalyze the monomerization of the pyrimidine dimers, restoring the original bases without breaking the phosphodiester backbone. This process is known as photoreactivation.

Answer:

• True (Correct answer)
• False