Understanding DNA Base Pair Alterations: C-G to U-G Mutation and Its Effects

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SUMMARY

The discussion centers on the mutation of a C-G base pair to a U-G base pair in DNA and its implications. Participants clarify that if a cytosine is deaminated to uracil, the DNA repair mechanisms will typically revert it back to cytosine, maintaining the original C-G pairing. The correct mutation resulting from deamination is identified as C-G to T-A. This process is linked to the concept of deamination and the role of DNA repair mechanisms in maintaining genetic integrity.

PREREQUISITES
  • Understanding of DNA structure and base pairing
  • Knowledge of deamination and its effects on DNA
  • Familiarity with DNA repair mechanisms
  • Basic genetics terminology
NEXT STEPS
  • Research "DNA repair mechanisms" to understand how cells correct mutations
  • Study "deamination in genetics" to explore the process and its consequences
  • Learn about "base excision repair" and its role in maintaining DNA integrity
  • Examine "activation-induced cytidine deaminase" and its function in immune responses
USEFUL FOR

Genetics students, molecular biologists, and researchers interested in DNA mutations and repair processes will benefit from this discussion.

1MileCrash
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If in a given DNA molecule a C-G base pair is
changed to a U-G base pair the following
mutational change in the DNA will result
a. C-G to G-C
b. C-G to T-A
c. C-G to A-T
d. C-G to A-U

Can someone elaborate on this for me?
 
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That doesn't really make any sense. If a base gets changed to a uracil in DNA, the cell will go "Hey! Uracil doesn't belong in DNA, it belongs in RNA" and would change it back to cytosine. It'd end up being C-G, just as it began.

Seeing as I just covered DNA repair in genetics, none of those answers seem correct to me.
 
Exactly!
 

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