What of the following checks dna for errors

A. DNA polymerase

B. Gel eletrophoresis

C. DNA fingerprinting

D. Restriction endonuclease

A. DNA polymerase

Explanation:

DNA polymerases (I,II,III) proofread the DNA, which helps to catch errors. Errors can be fatal to expression, creating misformed proteins or unclear information, so this is necessary.

Fun facts - the coronavirus is a retrovirus, so it doesn't proofread. That makes it much harder to find a vaccine, because it can generate new strains by the very fact of not proofreading.

69 is the correct math for the amino acids

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