Question 1

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Franklin

Accepted Answer

Franklin obtained excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units.

Answer: G
 Franklin worked at King's College at the same time as the person described in the statement.

Answer: B
 Franklin was not the first to describe DNA and extract it from cell nuclei, that distinction belongs to Friedrich Miescher.

Answer: C
 The DNA-digesting enzymes discovery belongs to Oswald Avery, Colin MacLeod, and Maclyn McCarty.

Answer: D
 The first to build an accurate model of DNA and to describe it explicitly in a publication was James Watson and Francis Crick.

Answer: E
 The demonstration that DNA, not protein, is the genetic material belongs to Alfred Hershey and Martha Chase.

Answer: F
 Chargaff's rules, which state that A = T and C = G, are attributed to Erwin Chargaff.

Question 2

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Hershey and Chase

Accepted Answer

Hershey and Chase conducted the famous experiment using radioactive isotopes to show that DNA, not protein, is the genetic material.

Answer: C
 Hershey and Chase also demonstrated that DNA-digesting enzymes prevented bacterial transformation, providing further evidence that DNA was the hereditary material.

Answer: G
 Rosalind Franklin worked at King's College at the same time as Hershey and Chase, but is not mentioned in this particular context.

Answer: B, D, F, H
 None of these answer choices relate specifically to Hershey and Chase. B refers to the work of Friedrich Miescher, D refers to the work of Watson and Crick, F refers to Chargaff's rules, and H refers to the work of Rosalind Franklin.

Question 3

Is it possible to prevent mutations entirely?

Accepted Answer

The answer of Is it possible to prevent mutations entirely?...

Question 4

DNA is replicated by a process called __________.

Accepted Answer

The answer of DNA is replicated by a process called...

Question 5

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Miescher

Accepted Answer

Miescher is credited with being the first to describe DNA and extract it from cell nuclei.

Answer: C
 Miescher discovered that DNA-digesting enzymes prevented bacterial transformation.

Answer: F
 Miescher provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G.

Answer: G
 Miescher did not work at King's College at the same time as Franklin. This is likely a reference to Maurice Wilkins, who worked at King's College at the same time as Rosalind Franklin.

Answer: H
 Miescher did not obtain excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units. This is a reference to the work of Rosalind Franklin.

Question 6

Consider the Hershey-Chase experiment.Is their choice of a bacteriophage unusual?

Accepted Answer

The answer of Consider the Hershey-Chase experiment.Is their choice of...

Question 7

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-A free nucleotide has a five carbon sugar (deoxyribose), __________ phosphate groups, and one of four nitrogen-containing bases.

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 8

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-Experiments with bacteria and __________ offered solid evidence that deoxyribonucleic acid (DNA), not protein, is hereditary material.

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 9

Does reproductive cloning always involve somatic cell nuclear transfer?

Accepted Answer

The answer of Does reproductive cloning always involve somatic cell...

Question 10

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Griffith

Accepted Answer

Griffith discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria.

Answer: C
 Griffith discovered that DNA-digesting enzymes prevented bacterial transformation.

Answer: F
 Griffith provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G.

Answer: G
 Griffith worked at King's College at the same time as Franklin.

Answer: H
 Griffith obtained excellent x-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units.

Question 11

A bacterium undergoes four rounds of replication.How many cells would result, and how many of those cells would still have part of an original DNA strand from the starting bacterium ?

Accepted Answer

The answer of A bacterium undergoes four rounds of replication.How...

Question 12

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-This nucleotide is not incorporated into the structure of the DNA helix.

Accepted Answer

Uracil is not incorporated into the structure of DNA helix, but only in RNA. The other nucleotides listed (A, C, G, T) are all part of DNA. The term "pyrimidine" refers to a class of nucleotides that includes both cytosine and thymine, so it is not the best choice for this question.

Question 13

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-Two hydrogen bonds connect adenine to __________ in the DNA molecule.

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 14

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Chargaff

Accepted Answer

Chargaff discovered that in DNA, the amount of adenine (A) equals the amount of thymine (T) and the amount of cytosine (C) equals the amount of guanine (G), providing the important clue that the base pairs must be complementary.

Answer: C
 Chargaff discovered that DNA-digesting enzymes prevented bacterial transformation, which eventually led to the understanding that DNA was the genetic material responsible for bacterial transformation.

Answer: E
 Chargaff was the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material.

Answer: B
 Although Chargaff made significant contributions to the understanding of DNA structure and function, he was not the first to describe DNA or extract it from cell nuclei. This honor belongs to Friedrich Miescher, who isolated a substance he called nuclein from the nuclei of white blood cells in the late 1800s.

Therefore, the best choices are F, C, E or B.

Question 15

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-If one chain of a DNA molecule has a purine at a given position, this complements it on the other chain.

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 16

In __________ one cell from an adult is fused with an enucleated egg.

Accepted Answer

The answer of In __________ one cell from an adult...

Question 17

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-Erwin Chargaff's data indicates that within a species the amount of adenine is always equal to the amount of this.

Accepted Answer

The answer of Classification.Answer the following questions in reference to...

Question 18

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Watson and Crick

Accepted Answer

Watson and Crick were the first to build an accurate model of DNA and to describe it explicitly in a publication.

Answer: H
 The excellent x-ray diffraction photographs obtained by Franklin suggested that DNA was a long, thin molecule with regularly repeating units.

Answer: F
 Watson and Crick provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G.

Answer: G
 Both Watson and Crick worked at King's College at the same time as Franklin.

The other answer choices are not correct:
A) This discovery was made by Griffith.
B) DNA was first described by Friedrich Miescher and first extracted by Phoebus Levene.
C) This discovery was made by Avery, MacLeod, and McCarty.
E) Hershey and Chase were the first to demonstrate this through their experiments with bacteriophages.

Question 19

Classification.Answer the following questions in reference to the five nucleotides listed below:
a.guanine
b.cytosine
c.pyrimidine
d.thymine
e.uracil
-This nucleotide is a double-ring molecule.

Accepted Answer

The only nucleotides that are double-ring molecules are purines, which include guanine and adenine. Cytosine, thymine, and uracil are all pyrimidines, which are single-ring molecules. Therefore, the best choices for a double-ring molecule are guanine and thymine.

Question 20

MATCHING
Choose the one most appropriate answer for each.
a.discovered that the hereditary system of one strain of bacteria could be transformed by the hereditary system from another strain of bacteria
b.first to discover DNA and isolate it from fish sperm
c.discovered that DNA-digesting enzymes prevented bacterial transformation
d.the first to build an accurate model of DNA and to describe it explicitly in a publication
e.the first to demonstrate, through the use of radioactive isotopes, that DNA, not protein, is the genetic material
f.provided two important clues to the structure of DNA; one clue is that A = T and the other is that C = G
g.discovered the structure of collagen
h.obtained excellent X-ray diffraction photographs that suggested that DNA was a long, thin molecule with regularly repeating units
-Pauling

Accepted Answer

The answer of MATCHING
Choose the one most appropriate answer for...

Quiz 8: Dna Structure and Function

Is it possible to prevent mutations entirely?

DNA is replicated by a process called __________.

Consider the Hershey-Chase experiment.Is their choice of a bacteriophage unusual?

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -A free nucleotide has a five carbon sugar (deoxyribose), __________ phosphate groups, and one of four nitrogen-containing bases.

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -Experiments with bacteria and __________ offered solid evidence that deoxyribonucleic acid (DNA), not protein, is hereditary material.

Does reproductive cloning always involve somatic cell nuclear transfer?

A bacterium undergoes four rounds of replication.How many cells would result, and how many of those cells would still have part of an original DNA strand from the starting bacterium ?

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -This nucleotide is not incorporated into the structure of the DNA helix.

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -Two hydrogen bonds connect adenine to __________ in the DNA molecule.

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -If one chain of a DNA molecule has a purine at a given position, this complements it on the other chain.

In __________ one cell from an adult is fused with an enucleated egg.

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -Erwin Chargaff's data indicates that within a species the amount of adenine is always equal to the amount of this.

Classification.Answer the following questions in reference to the five nucleotides listed below: a.guanine b.cytosine c.pyrimidine d.thymine e.uracil -This nucleotide is a double-ring molecule.