Adding nucleotides onto a growing DNA strand during DNA replication in cells occurs in ____

a. the 5' ® 3' direction for the leading strand and the 3' ® 5' direction on the lagging strand
b. either the 5' ® 3' direction or the 3' ® 5' direction on both strands, depending on where replication begins
c. the 5' ® 3' direction only
d. the 3' ® 5' direction for the leading strand and the 5' ® 3' direction on the lagging strand


e. the 3' ® 5' direction only


ANSWER: c

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