LEVEL 4
Q1
How does DNA polymerase move along each strand of DNA?
A. Both move towards the replication fork
B. Both move away from the replication fork
C. One moves towards from the replication fork and the other moves away from it
D. There is only one DNA polymerase on the DNA at a time
Q2
How can each copy of DNA at the end of replication be compared?
A. Each copy is identical to each other
B. Each copy is different from each other
C. They are 90% similar
D. They are 50% similar
Q3
What are damages or changes to a DNA sequence called?
A. Adaptations
B. Carcinogens
C. Mutagens
D. Mutations
Q4
In the event of a mismatched nucleotide, which molecule is able to backtrack, "proofread," and correct the nucleotide sequence?
A. DNA Proofreadase
B. DNA Polymerase
C. DNA Helicase
D. DNA Primase
Answer (2)
DNA polymerase moves towards the replication fork on the leading strand and away from it on the lagging strand. Changes to a DNA sequence are called mutations, and each DNA copy is identical after replication. DNA polymerase also has proofreading capabilities to correct mismatched nucleotides. ;
DNA polymerase moves toward the replication fork on the leading strand and away from it on the lagging strand. At the end of replication, the DNA copies are identical, and any changes to the DNA sequence are termed mutations, with DNA polymerase capable of proofreading for errors. The answers to the multiple-choice questions are C, A, D, and B, respectively.
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