Question 1

Which of the following statements is true?

Accepted Answer

A)  The hydrogen bonding of cytosine to guanine is an example of complementary base pairing.
B)  In DNA, adenine always base pairs with guanine, and cytosine always base pairs with thymine.
C)  Each of the four nucleotides in a DNA molecule has the same nitrogen-containing base.
D)  When adenine base pairs with thymine, they are linked by three hydrogen bonds.
E)  None of these statements are true.F) A) and B)
G) D) and E)

Question 2

Which of the following statements is NOT true concerning the results of Fred Griffith's experiments?

Accepted Answer

A)  Mice injected with smooth (S)  bacteria die.
B)  Mice injected with heat-killed, smooth bacteria die.
C)  Mice injected with heat-killed, smooth bacteria and live, rough (R)  bacteria die.
D)  Mice injected with rough bacteria live.
E)  The rough bacteria received genetic material from the smooth bacteria.F) A) and D)
G) B) and E)

Question 3

DNA replication is

Accepted Answer

A)  redundant.
B)  semiconservative.
C)  progressive.
D)  conservative.
E)  repetitive.F) C) and E)
G) A) and D)

Question 4

If all of the hydrogen bonds in a DNA molecule were to break,

Accepted Answer

A)  the nucleotide base pairs would separate from each other.
B)  base pairing would not be affected.
C)  the phosphate groups would separate from the deoxyribose sugars.
D)  the deoxyribose sugars would separate from the nitrogen-containing bases.
E)  the molecule would unwind, but the two strands would stay together.F) A) and D)
G) A) and C)

Question 5

In the spiral staircase model of DNA, the rungs are

Accepted Answer

A)  deoxyribose sugars.
B)  hydrogen bonds.
C)  nucleotide base pairs.
D)  phosphate groups.
E)  composed of all of these.F) A) and C)
G) A) and B) C

Question 6

The commercial cloning of pets and livestock is already being performed.The example in the introduction of your book was of a cloned

Accepted Answer

A)  cat.
B)  bull.
C)  pig.
D)  elk.
E)  dog.F) C) and D)
G) A) and D)

Question 7

Which scientist(s)  identified the transforming substance involved in changing rough (R)  bacteria to smooth (S) ?

Accepted Answer

A)  Avery and McCarty
B)  Griffith
C)  Chargaff
D)  Hershey and Chase
E)  PaulingF) A) and E)
G) A) and B)

Question 8

Which scientist(s)  discovered the basis for the base-pair rule, which states that the amounts of adenine and thymine match, as do the amounts of cytosine and guanine?

Accepted Answer

A)  Avery
B)  Griffith
C)  Chargaff
D)  Hershey and Chase
E)  PaulingF) A) and B)
G) None of the above

Question 9

The major challenge in using adult DNA in the cloning process is

Accepted Answer

A)  purifying the DNA.
B)  inserting the DNA into cells.
C)  reprogramming it to function like the DNA of an egg
D)  turning off unnecessary genes.
E)  determining what DNA is best to use.F) B) and E)
G) A) and D)

Question 10

Rosalind Franklin's research contribution was essential in

Accepted Answer

A)  establishing the chemical composition of DNA.
B)  establishing the principle of base pairing.
C)  establishing the principal dimensions of the DNA molecule.
D)  determining the sequence of nucleotides in DNA.
E)  determining the covalent bonding angles within DNA nucleotides.F) A) and B)
G) None of the above

Question 11

James Watson and Francis Crick

Accepted Answer

A)  were both English researchers working at Cambridge University.
B)  performed elegant experiments in DNA chemistry.
C)  constructed an accurate model of the DNA molecule illustrating its structural simplicity.
D)  performed experiments that convinced scientists that DNA is a double-stranded molecule.
E)  did all of theseF) All of the above
G) A) and B) C

Question 12

DNA polymerase assembles new strands

Accepted Answer

A)  in a 5' to 3' direction only.
B)  in a 5' to 3' direction building one strand and a 3' to 5' direction building the other stand.
C)  in a 5' to 3' direction building the first half of a strand and a 3' to 5' direction building the second half of a strand.
D)  in a 3' to 5' direction building the first half of a strand and a 5' to 3' direction building the second half of a strand.
E)  in a 3' to 5' direction on the "old" 3' to 5' strand.F) A) and D)
G) A) and C)

Question 13

If adenine bonds with guanine, and thymine bonds with cytosine, the DNA molecule would

Accepted Answer

A)  be constricted along its entire length.
B)  bulge where cytosine bonds with thymine.
C)  constrict where adenine bonds with guanine.
D)  partially constrict and partially bulge along its length.
E)  be highly reactive.F) B) and E)
G) B) and C)

Question 14

Johann Miescher worked with __________ cells.

Accepted Answer

A)  sperm
B)  red blood
C)  nerve
D)  muscle
E)  none of theseF) B) and C)
G) All of the above

Question 15

Rosalind Franklin used which technique to determine many of the physical characteristics of DNA?

Accepted Answer

A)  transformation
B)  transmission electron microscopy
C)  density-gradient centrifugation
D)  X-ray diffraction
E)  all of theseF) A) and D)
G) A) and C)

Question 16

Who was NOT involved in working out the structure of DNA?

Accepted Answer

A)  Avery
B)  Watson
C)  Wilkins
D)  Franklin
E)  ChargaffF) A) and B)
G) A) and C)

Question 17

Thealpha helix was described by

Accepted Answer

A)  Pauling.
B)  Hershey and Chase.
C)  Griffith.
D)  Watson and Crick.
E)  Avery.F) B) and E)
G) D) and E) A

Question 18

Bacteriophages are

Accepted Answer

A)  large bacteria.
B)  pathogenic bacteria.
C)  viruses that infect bacteria.
D)  virus-eating bacteria.
E)  viruses that infect eukaryotic cells.F) C) and D)
G) B) and D)

Question 19

Fred Griffith's experiments with two strains of Streptococcus pneumoniae

Accepted Answer

A)  resulted in a vaccine against bacterial pneumonia.
B)  demonstrated that rough (R)  bacteria cause pneumonia.
C)  provided evidence that genetic material from one bacterial strain can be transferred to that of another strain.
D)  demonstrated that mice can transform harmless bacteria into pathogenic bacteria.
E)  demonstrated that a harmless, smooth bacterial strain can be transformed into a lethal, rough bacterial strain.F) C) and E)
G) A) and D)

Question 20

Dolly the cloned sheep was conceived by inserting

Accepted Answer

A)  a nucleus from an egg cell into an unfertilized egg.
B)  a nucleus from a body cell into an unfertilized egg.
C)  a nucleus from a sperm cell into an unfertilized egg.
D)  two nuclei from body cells into an enucleated egg cell.
E)  a nucleus from a body cell into an enucleated egg cell.F) None of the above
G) A) and C)

Exam 13: Dna Structure and Function

Which of the following statements is true?

Correct AnswerverifiedShow Answer

Which of the following statements is NOT true concerning the results of Fred Griffith's experiments?

Correct AnswerverifiedShow Answer

DNA replication is

Correct AnswerverifiedShow Answer

If all of the hydrogen bonds in a DNA molecule were to break,

Correct AnswerverifiedShow Answer

In the spiral staircase model of DNA, the rungs are

Correct AnswerverifiedC

The commercial cloning of pets and livestock is already being performed.The example in the introduction of your book was of a cloned

Correct AnswerverifiedShow Answer

Which scientist(s) identified the transforming substance involved in changing rough (R) bacteria to smooth (S) ?

Correct AnswerverifiedShow Answer

Which scientist(s) discovered the basis for the base-pair rule, which states that the amounts of adenine and thymine match, as do the amounts of cytosine and guanine?

Correct AnswerverifiedShow Answer

The major challenge in using adult DNA in the cloning process is

Correct AnswerverifiedShow Answer

Rosalind Franklin's research contribution was essential in

Correct AnswerverifiedShow Answer

James Watson and Francis Crick

Correct AnswerverifiedC

DNA polymerase assembles new strands

Correct AnswerverifiedShow Answer

If adenine bonds with guanine, and thymine bonds with cytosine, the DNA molecule would

Correct AnswerverifiedShow Answer

Johann Miescher worked with __________ cells.

Correct AnswerverifiedShow Answer

Rosalind Franklin used which technique to determine many of the physical characteristics of DNA?

Correct AnswerverifiedShow Answer

Who was NOT involved in working out the structure of DNA?

Correct AnswerverifiedShow Answer

Thealpha helix was described by

Correct AnswerverifiedA

Bacteriophages are

Correct AnswerverifiedShow Answer

Fred Griffith's experiments with two strains of Streptococcus pneumoniae

Correct AnswerverifiedShow Answer

Dolly the cloned sheep was conceived by inserting

Correct AnswerverifiedShow Answer

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C

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C

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A

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