Question 1

A nucleoside consists of only a five-carbon sugar and a phosphate group.

Accepted Answer

A) True 
 B)False

Question 2

A DNA strand can be described as antiparallel but uncomplementary.

Accepted Answer

A) True 
 B)False

Question 3

What is a component of a single nucleotide?

Accepted Answer

A)  A phosphate group
B)  A six carbon sugar
C)  All five nitrogenous bases

Question 4

The individual(s)  who used ball and stick models to identify the three-dimensional structure of proteins was _______.

Accepted Answer

A)  Franklin
B)  Watson and Crick
C)  Hershey and Chase
D)  Pauling
E)  Chargaff

Question 5

An RNA strand with sequence 5'-GUACAAUGACUUAUGUAC-3' can potentially form which structure?

Accepted Answer

A)  bulge loop
B)  internal loop
C)  multibranched junction
D)  stem-loop

Question 6

DNA can exist as a triple helix, although its function in biological systems is not well understood.

Accepted Answer

A) True 
 B)False

Question 7

What is the directionality of the DNA molecule?

Accepted Answer

A)  front to back
B)  top to bottom
C)  5' to 3'
D)  3' to 5'
E)   all DNA molecules are different in their directionality

Question 8

The helical shape of the DNA contains major and minor grooves, which assist in the regulating of gene expression.

Accepted Answer

A) True 
 B)False

Question 9

What DNA form is most common in living organisms?

Accepted Answer

A)  A DNA
B)  B DNA
C)  Z DNA
D)  Triplex DNA B

Question 10

In a double-helix DNA strand, the adenine on one strand forms a hydrogen bond with a(n)  ____ on the other strand.

Accepted Answer

A)   adenine
B)   guanine
C)   thymine
D)   cytosine

Question 11

According to Chargaff's rule, if the DNA of a species contains 20% adenine, what percent of guanine will it contain?

Accepted Answer

A)   20%
B)   30%
C)   50%
D)   75%

Question 12

The individuals who determined that Griffith's transforming principle was DNA were __________.

Accepted Answer

A)   Hershey and Chase
B)   Avery, Macleod, and McCarty
C)   Watson and Crick
D)   Creighton and McClintock

Question 13

DNA is recognized as a left-handed molecule.

Accepted Answer

A) True 
 B)False

Question 14

The fact that the type R and S strains of Streptococcus pneumoniae that Griffith worked with possessed small differences in capsule structure satisfies which of the following criteria for genetic material?

Accepted Answer

A)  Transmission
B)  Replication
C)  Information
D)  Variation

Question 15

The _______ was labeled using the radioisotope 32P in the Hershey-Chase experiments.

Accepted Answer

A)   RNA
B)   DNA
C)   protein
D)   carbohydrates

Question 16

The fact that the helixes of the DNA strand are arranged in opposite directions gives DNA its _____ characteristics.

Accepted Answer

A)   antiparallel
B)   complementary
C)   redundant
D)   water-soluble A

Question 17

Which DNA molecule form is a left-handed?

Accepted Answer

A)  A DNA
B)  B DNA
C)  Z DNA
D)  R DNA

Question 18

How many bases are necessary to complete three complete twists (1080 degrees)  of a DNA helix?

Accepted Answer

A)  5
B)  10
C)  30
D)  60

Question 19

What is one of the criteria that all genetic material must meet?

Accepted Answer

A)  It does NOT contain the information necessary to construct the entire organism.
B)  It must be passed from offspring to parent.
C)  It must be able to be copied.
D)  It must have a limited amount of variation. C

Question 20

What is a characteristic of T2 bacteriophage?

Accepted Answer

A)  It does not require a host cell for replication
B)  The phage attaches to the cell wall of a target eukaryotic cell
C)  The phages injects its DNA into the host cell
D)  The new phages are formed outside the host cell

Exam 9: Molecular Structure of DNA and RNA

A nucleoside consists of only a five-carbon sugar and a phosphate group.

Correct AnswerverifiedShow Answer

A DNA strand can be described as antiparallel but uncomplementary.

Correct AnswerverifiedShow Answer

What is a component of a single nucleotide?

Correct AnswerverifiedShow Answer

The individual(s) who used ball and stick models to identify the three-dimensional structure of proteins was _______.

Correct AnswerverifiedShow Answer

An RNA strand with sequence 5'-GUACAAUGACUUAUGUAC-3' can potentially form which structure?

Correct AnswerverifiedShow Answer

DNA can exist as a triple helix, although its function in biological systems is not well understood.

Correct AnswerverifiedShow Answer

What is the directionality of the DNA molecule?

Correct AnswerverifiedShow Answer

The helical shape of the DNA contains major and minor grooves, which assist in the regulating of gene expression.

Correct AnswerverifiedShow Answer

What DNA form is most common in living organisms?

Correct AnswerverifiedB

In a double-helix DNA strand, the adenine on one strand forms a hydrogen bond with a(n) ____ on the other strand.

Correct AnswerverifiedShow Answer

According to Chargaff's rule, if the DNA of a species contains 20% adenine, what percent of guanine will it contain?

Correct AnswerverifiedShow Answer

The individuals who determined that Griffith's transforming principle was DNA were __________.

Correct AnswerverifiedShow Answer

DNA is recognized as a left-handed molecule.

Correct AnswerverifiedShow Answer

The fact that the type R and S strains of Streptococcus pneumoniae that Griffith worked with possessed small differences in capsule structure satisfies which of the following criteria for genetic material?

Correct AnswerverifiedShow Answer

The _______ was labeled using the radioisotope 32P in the Hershey-Chase experiments.

Correct AnswerverifiedShow Answer

The fact that the helixes of the DNA strand are arranged in opposite directions gives DNA its _____ characteristics.

Correct AnswerverifiedA

Which DNA molecule form is a left-handed?

Correct AnswerverifiedShow Answer

How many bases are necessary to complete three complete twists (1080 degrees) of a DNA helix?

Correct AnswerverifiedShow Answer

What is one of the criteria that all genetic material must meet?

Correct AnswerverifiedC

What is a characteristic of T2 bacteriophage?

Correct AnswerverifiedShow Answer

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B

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The _______ was labeled using the radioisotope ³²P in the Hershey-Chase experiments.

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A

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C

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