Question 1

In experiments to show that DNA is the genetic material,Hershey and Chase labeled DNA with radioactive

Accepted Answer

A)  amino acids. 
B)  sulfur. 
C)  phosphorus. 
D)  carbon. 
E)  nitrogen. 
A)  amino acids. 
B)  sulfur. 
C)  phosphorus. 
D)  carbon. 
E)  nitrogen. C

Question 2

Hershey and Chase demonstrated that DNA was the genetic material using

Accepted Answer

A)  poodles in microwave ovens. 
B)  hamsters and a blender. 
C)  frogs and a dishwasher. 
D)  viruses and a blender. 
E)  X-rays and models. 
A)  poodles in microwave ovens. 
B)  hamsters and a blender. 
C)  frogs and a dishwasher. 
D)  viruses and a blender. 
E)  X-rays and models. D

Question 3

Which base pair is complementary?

Accepted Answer

A)  A and T 
B)  C and T 
C)  A and G 
D)  C and C 
E)  G and G 
A)  A and T 
B)  C and T 
C)  A and G 
D)  C and C 
E)  G and G A

Question 4

Frederick Griffith was a microbiologist who observed that

Accepted Answer

A)  DNA contains nitrogen and phosphorus. 
B)  proteases disrupt transformation from nonvirulence to virulence. 
C)  DNA from heat-killed viruses transforms virulent viruses. 
D)  nonvirulent bacteria become virulent when mixed with heat-killed virulent bacteria. 
E)  the X-ray diffraction pattern of DNA is highly symmetrical. 
A)  DNA contains nitrogen and phosphorus. 
B)  proteases disrupt transformation from nonvirulence to virulence. 
C)  DNA from heat-killed viruses transforms virulent viruses. 
D)  nonvirulent bacteria become virulent when mixed with heat-killed virulent bacteria. 
E)  the X-ray diffraction pattern of DNA is highly symmetrical.

Question 5

The number of DNA replications in an average human lifetime is very approximately

Accepted Answer

A)  one billion. 
B)  three trillion. 
C)  100 trillion. 
D)  100 quadrillion. 
E)  infinite. 
A)  one billion. 
B)  three trillion. 
C)  100 trillion. 
D)  100 quadrillion. 
E)  infinite.

Question 6

Hydrogen bonds are not as strong as ionic or covalent bonds,but they are able to hold the DNA double helix together because

Accepted Answer

A)  there are so many of them. 
B)  there are so few of them. 
C)  the hydrogen bonds in DNA are different than the hydrogen bonds in other molecules. 
D)  the hydrogen bonds in DNA also have a very special type of molecular glue. 
E)  ten of them form between each DNA base pair. 
A)  there are so many of them. 
B)  there are so few of them. 
C)  the hydrogen bonds in DNA are different than the hydrogen bonds in other molecules. 
D)  the hydrogen bonds in DNA also have a very special type of molecular glue. 
E)  ten of them form between each DNA base pair.

Question 7

DNA entwined around an octet of proteins is called a(n)

Accepted Answer

A)  nucleotide. 
B)  karyosome. 
C)  nucleosome. 
D)  ribosome. 
E)  octet. 
A)  nucleotide. 
B)  karyosome. 
C)  nucleosome. 
D)  ribosome. 
E)  octet.

Question 8

In one minute,DNA replicates about _______ bases.

Accepted Answer

A)  40 
B)  100 
C)  250 
D)  1,000 
E)  3,000 
A)  40 
B)  100 
C)  250 
D)  1,000 
E)  3,000

Question 9

In DNA,cytosine binds with

Accepted Answer

A)  uracil. 
B)  adenine. 
C)  thymine. 
D)  guanine. 
E)  amino acids. 
A)  uracil. 
B)  adenine. 
C)  thymine. 
D)  guanine. 
E)  amino acids.

Question 10

The "steps" of the DNA double helix spiral staircase are

Accepted Answer

A)  sugars. 
B)  hydrogen bonds. 
C)  base pairs. 
D)  nucleotides. 
E)  phosphates. 
A)  sugars. 
B)  hydrogen bonds. 
C)  base pairs. 
D)  nucleotides. 
E)  phosphates.

Question 11

In DNA replication,

Accepted Answer

A)  parental DNA shatters into pieces, and joins with newly-synthesized pieces to fashion two double helices from one. 
B)  parental DNA remains intact but guides formation of new double helices. 
C)  the parental DNA splits and free nucleotides bond to their complements, building two DNA molecules from one. 
D)  an entirely new double helix is built using information in the sequence of amino acids. 
E)  DNA taken into the body in the diet enters cells and joins the DNA. 
A)  parental DNA shatters into pieces, and joins with newly-synthesized pieces to fashion two double helices from one. 
B)  parental DNA remains intact but guides formation of new double helices. 
C)  the parental DNA splits and free nucleotides bond to their complements, building two DNA molecules from one. 
D)  an entirely new double helix is built using information in the sequence of amino acids. 
E)  DNA taken into the body in the diet enters cells and joins the DNA.

Question 12

Chromatin consists of about

Accepted Answer

A)  10% histones, 30% DNA binding proteins, 30% DNA, and 30% RNA. 
B)  25% histones, 25% DNA binding proteins, 25% DNA, and 25% RNA. 
C)  30% histones, 30% DNA binding proteins, 30% DNA, and 10% RNA. 
D)  10% histones, 10% DNA binding proteins, 70% DNA, and 10% RNA. 
E)  90% DNA and 20% proteins. 
A)  10% histones, 30% DNA binding proteins, 30% DNA, and 30% RNA. 
B)  25% histones, 25% DNA binding proteins, 25% DNA, and 25% RNA. 
C)  30% histones, 30% DNA binding proteins, 30% DNA, and 10% RNA. 
D)  10% histones, 10% DNA binding proteins, 70% DNA, and 10% RNA. 
E)  90% DNA and 20% proteins.

Question 13

Which of the following were part of the experiments of Hershey and Chase?

Accepted Answer

A) Mice were injected with type R bacteria and developed pneumonia. 
B) Mice were injected with type S bacteria and developed pneumonia. 
C) DNA isolated from type S bacteria killed by heating transformed type R bacteria. 
D) E.coli bacteria were infected with virus labeled with radioactive phosphorus. 
E) The researchers made models of the DNA molecule. 
A) Mice were injected with type R bacteria and developed pneumonia. 
B) Mice were injected with type S bacteria and developed pneumonia. 
C) DNA isolated from type S bacteria killed by heating transformed type R bacteria. 
D) E.coli bacteria were infected with virus labeled with radioactive phosphorus. 
E) The researchers made models of the DNA molecule.

Question 14

The enzyme that inserts the correct bases in a growing nucleotide chain in a replicating DNA molecule is

Accepted Answer

A)  RNA polymerase. 
B)  DNA ligase. 
C)  DNA polymerase. 
D)  helicase. 
E)  RNA ligase. 
A)  RNA polymerase. 
B)  DNA ligase. 
C)  DNA polymerase. 
D)  helicase. 
E)  RNA ligase.

Question 15

Because DNA strands are antiparallel,replication proceeds

Accepted Answer

A)  continuously on both strands. 
B)  continuously on one strand and discontinuously on the other. 
C)  discontinuously on both strands. 
D)  continuously on both strands for a time and then discontinuously. 
E)  discontinuously using amino acids. 
A)  continuously on both strands. 
B)  continuously on one strand and discontinuously on the other. 
C)  discontinuously on both strands. 
D)  continuously on both strands for a time and then discontinuously. 
E)  discontinuously using amino acids.

Question 16

Meselson and Stahl's experiment followed

Accepted Answer

A)  the distribution of different-weighted DNA over three generations of bacteria. 
B)  the distribution of different-labeled DNA over three generations of humans. 
C)  the ability of a protease or nuclease to stop the transmission of DNA over generations. 
D)  viruses injecting their DNA into bacteria. 
E)  DNA sequences in people who are politically liberal compared to those who are sometimes politically conservative. 
A)  the distribution of different-weighted DNA over three generations of bacteria. 
B)  the distribution of different-labeled DNA over three generations of humans. 
C)  the ability of a protease or nuclease to stop the transmission of DNA over generations. 
D)  viruses injecting their DNA into bacteria. 
E)  DNA sequences in people who are politically liberal compared to those who are sometimes politically conservative.

Question 17

The nitrogenous bases adenine and thymine are

Accepted Answer

A)  both purines. 
B)  both pyrimidines. 
C)  both amino acids. 
D)  a purine and a pyrimidine, respectively. 
E)  a pyrimidine and a purine, respectively. 
A)  both purines. 
B)  both pyrimidines. 
C)  both amino acids. 
D)  a purine and a pyrimidine, respectively. 
E)  a pyrimidine and a purine, respectively.

Question 18

Okazaki fragments are small pieces of

Accepted Answer

A)  RNA. 
B)  protein. 
C)  DNA. 
D)  enzymes. 
E)  sushi. 
A)  RNA. 
B)  protein. 
C)  DNA. 
D)  enzymes. 
E)  sushi.

Question 19

DNA in the nucleus winds around proteins called

Accepted Answer

A)  histones. 
B)  herstones. 
C)  karyosomes. 
D)  ribosomes. 
E)  proteasomes. 
A)  histones. 
B)  herstones. 
C)  karyosomes. 
D)  ribosomes. 
E)  proteasomes.

Question 20

Purines and pyrimidines refer to the ______ of the DNA molecules.

Accepted Answer

A)  nitrogenous bases 
B)  sugar-phosphate backbone 
C)  hydrogen bonds 
D)  nucleus 
E)  histones 
A)  nitrogenous bases 
B)  sugar-phosphate backbone 
C)  hydrogen bonds 
D)  nucleus 
E)  histones

Exam 9: DNA Structure and Replication

In experiments to show that DNA is the genetic material,Hershey and Chase labeled DNA with radioactive

Hershey and Chase demonstrated that DNA was the genetic material using

Which base pair is complementary?

Frederick Griffith was a microbiologist who observed that

The number of DNA replications in an average human lifetime is very approximately

Hydrogen bonds are not as strong as ionic or covalent bonds,but they are able to hold the DNA double helix together because

DNA entwined around an octet of proteins is called a(n)

In one minute,DNA replicates about _______ bases.

In DNA,cytosine binds with

The "steps" of the DNA double helix spiral staircase are

In DNA replication,

Chromatin consists of about

Which of the following were part of the experiments of Hershey and Chase?

The enzyme that inserts the correct bases in a growing nucleotide chain in a replicating DNA molecule is

Because DNA strands are antiparallel,replication proceeds

Meselson and Stahl's experiment followed

The nitrogenous bases adenine and thymine are

Okazaki fragments are small pieces of

DNA in the nucleus winds around proteins called

Purines and pyrimidines refer to the ______ of the DNA molecules.

Overview of Genetics

Cells

Meiosis and Development

Single-Gene Inheritance

Beyond Mendels Law

Matters of Sex

Multifactorial Traits

Genetics of Behavior

Gene Action: From Dna to Protein

Gene Expression and Epigenetics

Gene Mutation

Chromosomes

Constant Allele Frequencies

Changing Allele Frequencies

Human Ancestry

Genetics of Immunity

Genetics of Cancer

Genetic Technologies: Amplifying, Modifying, and Monitoring DNA

Genetic Testing and Treatment

Reproductive Technologies

Genomics

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