Ultraviolet (UV) radiation can cause
cyclobutane pyrimidine dimers (CPDs) and 6,4 photoproducts, which distort the
DNA helix. Cells must remove these lesions to restore normal DNA structure
before replication occurs.

Which sequence of events best explains
how cells repair this type of DNA damage?

Question

Ultraviolet (UV) radiation can cause
cyclobutane pyrimidine dimers (CPDs) and 6,4 photoproducts, which distort the
DNA helix. Cells must remove these lesions to restore normal DNA structure
before replication occurs.

Which sequence of events best explains
how cells repair this type of DNA damage?

Accepted Answer

The
damaged DNA is recognised and cleaved by a repair complex, before the damaged
segment is removed and the gap is filled

Answer

The damaged DNA bases
are directly converted into normal bases using DNA polymerase

Answer

The damaged DNA
strand is degraded and replaced with an entirely new DNA strand

Answer

DNA polymerase
directly replaces the damaged bases without removing the surrounding DNA
sequence

Crowdly

Ultraviolet (UV) radiation can cause cyclobutane pyrimidine dimers (CPDs) and 6...

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