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DNA polymerase III


A) is needed for adding nucleotides during mRNA synthesis.
B) synthesizes new DNA only in the 5'to 3'direction.
C) cannot add nucleotides to the lagging strand.
D) synthesizes an RNA primer.

E) C) and D)
F) A) and B)

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RNA molecules differ from DNA molecules because only RNA


A) has ribose.
B) has uracil.
C) is typically one strand of nucleotides.
D) does not have thymine.
E) All of the choices are correct.

F) C) and D)
G) A) and B)

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Microorganisms exhibit genomes contained on


A) chromosomes.
B) plasmids.
C) mitochondrial DNA.
D) chloroplast DNA.
E) All of the choices are correct depending on the type of microorganism observed.

F) A) and B)
G) A) and C)

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The smallest unit of heredity is a chromosome.

A) True
B) False

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