Chapter 16 Review Page 1

This is an image of a1

A phage.B protist.C moneran.D bacterium.E red blood cell.

Who demonstrated that DNA is the genetic material of the T2 phage?2

A FranklinB Watson and CrickC Meselson and StahlD Hershey and ChaseE Darwin and Wallace

The radioactive isotope 32P labels the T2 phage's3

A tail.B DNA.C head.D base plate.E protein coat.

Hershey and Chase used _____ to radioactively label the T2 phage's proteins.4

A 14CB 35SC 32PD 92UE 222Ra

After allowing phages grown with bacteria in a medium that contained 32P and 35S,Hershey and Chase used a centrifuge to separate the phage ghosts from the infected cell.They then examined the infected cells and found that they contained ____, whichdemonstrated that ____ is the phage's genetic material.

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A labeled DNA ... DNAB labeled DNA ... proteinC labeled protein ... DNAD labeled protein ... proteinE labeled DNA ... labeled protein

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Chapter 16 Review Page 2

In the accompanying image, a nucleotide is indicated by the letter _____.6

A AB BC CD DE E

Which of these is a difference between a DNA and an RNA molecule?7

A DNA contains uracil, whereas RNA contains thymine.B DNA is double-stranded, whereas RNA is single-stranded.C DNA contains nitrogenous bases, whereas RNA contains phosphate groups.D DNA contains five-carbon sugars, whereas RNA contains six-carbon sugars.E DNA is a polymer composed of nucleotides, whereas RNA is a polymer

composed of nucleic acids.

This is an image of a(n)8

A thiol.B nucleotide.C amino acid.D nucleic acid.E none of the above

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Chapter 16 Review Page 3

The letter "A" indicates a9

A sugar.B nucleotide.C phosphate group.D nitrogenous base.E none of the above

A nitrogenous base is indicated by the letter _____.10

A AB BC CD DE E

You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide becauseyou see a

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A phosphate group, not a uracil.B sugar with two, and not three, oxygen atoms.C uracil nitrogenous base, not a thymine nitrogenous base.D thymine nitrogenous base, not a uracil nitrogenous base.E double-stranded molecule, not a single-stranded molecule.

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Chapter 16 Review Page 4

Which of these nitrogenous bases is found in RNA but not in DNA?12

A uracilB guanineC adenineD cytosineE thymine

Which of these is(are) pyrimidines?13

A A and BB A, B, and CC B and CD B, C, and DE C, D, and E

In a nucleotide, the nitrogenous base is attached to the sugar's _____ carbon and thephosphate group is attached to the sugar's _____ carbon.

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A 1' ... 2'B 1' ... 5'C 2' ... 3'D 1' ... 3'E 2' ... 1'

Nucleic acids are assembled in the _____ direction.15

A 1' to 5'B 2' to 3'C 5' to 3'D 4' to 5'E 5' to 1'

In a DNA double helix an adenine of one strand always pairs with a(n) _____ of thecomplementary strand, and a guanine of one strand always pairs with a(n) _____ of thecomplementary strand.

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A cytosine ... uracilB uracil ... cytosineC guanine ... adenineD cytosine ... thymineE thymine ... cytosine

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Chapter 16 Review Page 5

Short segments of newly synthesized DNA are joined into a continuous strand by17

A ligase.B primase.C helicase.D DNA polymerase.E single-strand binding protein

After DNA replication is completed,18

A there are four double helices.B each new DNA double helix consists of two new strands.C each new DNA double helix consists of one old DNA strand and one new

DNA strand.D each of the four DNA strands consists of some old strand parts and some

new strand parts.E one DNA double helix consists of two old strands and one DNA double helix

consists of two new strands.

The first step in the replication of DNA is catalyzed by19

A ligase.B primase.C helicase.D DNA polymerase.E single-strand binding protein.

The action of helicase creates20

A primers and DNA fragments.B primers and replication bubbles.C DNA fragments and replication forks.D DNA fragments and replication bubbles.E replication forks and replication bubbles.

Why is the new DNA strand complementary to the 3' to 5' strands assembled in shortsegments?

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A the replication forks block the formation of longer strandsB it is more efficient than assembling complete new strandsC only short DNA sequences can extend off the RNA primersD DNA polymerase can assemble DNA only in the 3' to 5' directionE DNA polymerase can assemble DNA only in the 5' to 3' direction

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Chapter 16 Review Page 6

The synthesis of a new strand begins with the synthesis of a(n)22

A poly(A) tail.B Okazaki fragment.C short pieces of DNA.D single-strand binding protein.E RNA primer complementary to a preexisting DNA strand.

Which of these is responsible for catalyzing the formation of an RNA primer?23

A AB BC CD DE E

An old DNA strand is used as a _____ for the assembly of a new DNA strand.24

A modelB primerC templateD complementE source of nucleotides

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Chapter 16 Review Page 7

Answer Key :

Question: Answer

Chapter 16 Review

A1D2B3B4A5B6B7B8C9C10B11A12E13B14C15E16A17C18C19E20E21E22D23C24

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