A researcher studying bacteria exposed
to UV radiation observes that cells survive only if they possess functional
UvrA, UvrB, and UvrC proteins. Mutants lacking these proteins accumulate DNA
lesions and fail to repair the damage.

Which explanation best accounts for
this observation?

Question

A researcher studying bacteria exposed
to UV radiation observes that cells survive only if they possess functional
UvrA, UvrB, and UvrC proteins. Mutants lacking these proteins accumulate DNA
lesions and fail to repair the damage.

Which explanation best accounts for
this observation?

Accepted Answer

These
proteins recognise, excise and repair DNA around UV-induced lesions

Answer

These proteins
convert damaged DNA bases directly back to their original form

Answer

These proteins
activate oncogenes that protect the cell from UV damage

Answer

These proteins
prevent UV radiation from interacting with DNA

Crowdly

A researcher studying bacteria exposed to UV radiation observes that cells surv...

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