Multiple Choice
Which enzyme is primarily responsible for cutting DNA into small fragments during the process of DNA repair?
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17. Mutation, Repair, and Recombination
DNA Repair
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Which restriction enzyme would cut the DNA strand with the sequence gcatggatcccaatgc?
A
HindIII
B
BamHI
C
SmaI
D
EcoRI
Verified step by step guidance1
Identify the recognition sequences for each restriction enzyme given in the options: HindIII, BamHI, SmaI, and EcoRI. For example, BamHI recognizes the sequence $\text{GGATCC}$.
Examine the provided DNA sequence: $\text{gcatggatcccaatgc}$. Look for the presence of each enzyme's recognition site within this sequence.
Check if the BamHI recognition sequence $\text{GGATCC}$ appears in the DNA strand. Note that DNA sequences are usually written 5' to 3', so ensure you are reading the sequence correctly.
Confirm that the other enzymes' recognition sequences (HindIII, SmaI, EcoRI) are not present in the given DNA strand by comparing their known recognition sites to the sequence.
Conclude which enzyme would cut the DNA based on the presence of its recognition site in the sequence. The enzyme whose recognition site is found in the DNA strand is the one that will cut it.
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