Question

Which of the following checks DNA for errors?

O
O
A. DNA fingerprinting
O
B. DNA polymerase
O
O
C. Gel electrophoresis
O
D. Restriction endonuclease
SUBMIT

Answer 1

Answer: B. DNA polymerase

Explanation: DNA polymerase is an enzyme that catalyzes the addition of free nucleotides to the primer during replication. DNA polymerase also has a 3'->5' exonuclease activity which double-checks each nucleotide after it is added. The exonuclease activity of the DNA polymerase permits it to remove a newly added mismatched nucleotide. When the polymerase adds a wrong nucleotide, movement of the enzyme to the point where the next nucleotide will be added is halted, this 3'->5' exonuclease activity removes the mismatched nucleotide so that replication can continue.

Answer 2

Option B. DNA polymerase, is the correct answer.

Explanation:

DNA polymerase is a material which is responsible for checking errors in the DNA. Sometimes, errors occurs when the nucleotides is entered into the growing strand. When the error occurs, it can be corrected by DNA polymerase or another DNA containing enzyme. Sometimes, DNA is repaired and sometimes dealth occurs and removed from the body.