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CLEP Biology Practice Test
Multiple Choice
CLEP Biology
Multiple Choice Practice Test
Question 1 of 3
45% Get this Question Right
Which of the following is true of the enzyme telomerase?
A
It acts in the 3→5 direction
B
It takes the place of primase at the ends of chromosomes
C
It requires a chromosomal DNA template
D
It adds a repetitive DNA sequence to the end of chromosomes
E
It is active on the leading strand during DNA synthesis
Each time a cell divides, a few base pairs of DNA at the end of each chromosome are lost. Telomerase is an enzyme that uses a built-in template to add a short sequence of DNA over and over at the end of chromosomes-a sort of protective "cap". This prevents the loss of genetic material with each round of DNA replication.
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