GENETICS
Exposure to UV light results in thymine dimers between adjacentthymines in a single DNA strand. Describe how repair of this damagemight lead to a mutation.
GENETICS
Exposure to UV light results in thymine dimers between adjacentthymines in a single DNA strand. Describe how repair of this damagemight lead to a mutation.
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Related textbook solutions
Related questions
1. Which of these statements is correct in regards to the repair of DNA damaged by UV light.
A. a type of nuclease functions to remove the damage | ||
B. a helicase melts the double helix DNA | ||
C. DNA pol III fills in the missing strand | ||
D. RNA ligase functions to seal the breaks | ||
E. Incorrect or lack or repair can cause xeroderma pigmentosum. |
2. DNA uses Thymine not uracil, as deamination of thymine would lead to cytosine, and therefore mutation in the DNA during replication.
True
False
1. Synthesis of which of the following proteins is not induced by the SOS signal?
DNA polymerase I |
DNA polymerase II |
DNA polymerase IV |
DNA polymerase V |
none of the above |
2. N-glycosyl bond cleavage is the first step of:
Base excision repair |
Mismatch repair |
Nucleotide excision repair |
SOS response |
photoreactivation |
3. The ________ repair pathway removes and replaces damaged or inappropriate bases.
Base excision |
Mismatch |
Nucleotide excision |
SOS response |
none of the above |
4. In eukaryotic cells, thymine-thymine dimers are primarily repaired by:
Base excision repair |
Mismatch repair |
Nucleotide excision repair |
SOS response |
photoreactivation |
5. __________ is the repair of UV-damaged DNA by a light-dependent enzymatic reaction.
Photoreactivation |
Sensory deprivation |
Photoinduction |
Photosynthesis |
none of the above |