Question 1

How did Oswald, Avery, and colleagues determine that DNA stores genetic information?

Accepted Answer

Using two strains of pneumococcus bacterium they purified the DNA from the S strain that causes pneumonia and discovered this DNA was capable of transforming the R strain into the S strain.

Question 2

Describe some features of DNA that were determined by an X-ray diffraction experiment.

Accepted Answer

The structure is helical. The ...

Question 3

Benzopyrene modified by the cytochrome enzyme forms an adduct with which nucleotide?

Accepted Answer

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

Question 4

Which bacterium was used to demonstrate that DNA stores hereditary information?

Accepted Answer

A)   staphylococcus
B)   streptococcus
C)   pneumococcus
D)   diplococcus

Question 5

How are the carbons in deoxyribose labeled?

Accepted Answer

A)   1, 2, 3, 4, and 5
B)   1a, 2a, 3a, 4a, and 5a
C)   1', 2', 3', 4', and 5'
D)   a, b, c, d, and e

Question 6

What is the composition of a nucleotide in DNA, and how is it configured?

Accepted Answer

There are three components: ph...

Question 7

Who discovered that DNA existed in two structural varieties?

Accepted Answer

A)   Maurice Wilkins
B)   Rosalind Franklin
C)   Francis Crick
D)   Linus Pauling

Question 8

UV light can initiate a chemical reaction to form a covalent bond between

Accepted Answer

A)   neighboring purines.
B)   neighboring pyrimidines.
C)   a purine and a neighboring pyrimidine.
D)   neighboring deoxyribose units. B

Question 9

When DNA replicates, the strands unzip and one strand serves as a ____________________ to synthesize a matching strand.

Accepted Answer

The answer of When DNA replicates, the strands unzip and...

Question 10

What are the strands of the DNA double helix called before replication?

Accepted Answer

A)   super strands
B)   master strands
C)   parent strands
D)   daughter strands

Question 11

What is the complementary nucleotide sequence to 5' - TCTGAAGAAG - 3'?

Accepted Answer

A)   3' - GAGTCCTCCT - 5'
B)   3' - CTCAGGAGGA - 5'
C)   5' - AGACTTCTTC - 3'
D)   3' - AGACTTCTTC - 5'

Question 12

What substance is responsible for adding new nucleotides to a DNA strand during replication?

Accepted Answer

A)   DNA polymerase
B)   Mg2+ ions
C)   DNA repair system
D)   cytochrome enzyme

Question 13

What technique did Linus Pauling bring to determining molecular structures?

Accepted Answer

A)   X-ray diffraction spectroscopy
B)   drawing Lewis dot structures
C)   NMR spectroscopy
D)   building molecular models

Question 14

The link between two ribose molecules in DNA is called ____________________.

Accepted Answer

the phosph...

Question 15

Describe how a double helix DNA prepares for replication.

Accepted Answer

Since the base pairs hold the two strand...

Question 16

During replication, the two strands of DNA unzip. Describe how a daughter strand is synthesized from a parent DNA strand.

Accepted Answer

Because the base pairings are so unique ...

Question 17

What experimental technique was used to determine that DNA is a double helix?

Accepted Answer

A)   building molecular models
B)   determining chemical properties
C)   drawing structures on paper
D)   X-ray diffraction

Question 18

What is the new strand in a replicated DNA molecule called?

Accepted Answer

A)   super strand
B)   master strand
C)   parent strand
D)   daughter strand

Question 19

In an X-ray diffraction experiment a sample is placed in the path of X-rays. What is seen on the photographic film?

Accepted Answer

A)   an image of the atoms within the sample
B)   a diffraction pattern
C)   an outline of the sample molecule
D)   an image of the strand of DNA

Question 20

A cytochrome enzyme causes what change to benzopyrene?

Accepted Answer

A)   formation of an adduct with DNA
B)   addition of three oxygen atoms
C)   formation of a benzopyrene dimer
D)   ionization of benzopyrene

Exam 12: DNA: The Molecule of Heredity

How did Oswald, Avery, and colleagues determine that DNA stores genetic information?

Correct AnswerverifiedUsing two strains of pneumococcus bacterium they purified the DNA from the S strain that causes pneumonia and discovered this DNA was capable of transforming the R strain into the S strain.

Describe some features of DNA that were determined by an X-ray diffraction experiment.

Correct AnswerverifiedThe structure is helical. The ...View AnswerShow Answer

Benzopyrene modified by the cytochrome enzyme forms an adduct with which nucleotide?

Correct AnswerverifiedD

Which bacterium was used to demonstrate that DNA stores hereditary information?

Correct AnswerverifiedShow Answer

How are the carbons in deoxyribose labeled?

Correct AnswerverifiedShow Answer

What is the composition of a nucleotide in DNA, and how is it configured?

Correct AnswerverifiedThere are three components: ph...View AnswerShow Answer

Who discovered that DNA existed in two structural varieties?

Correct AnswerverifiedShow Answer

UV light can initiate a chemical reaction to form a covalent bond between

Correct AnswerverifiedB

When DNA replicates, the strands unzip and one strand serves as a ____________________ to synthesize a matching strand.

Correct AnswerverifiedShow Answer

What are the strands of the DNA double helix called before replication?

Correct AnswerverifiedShow Answer

What is the complementary nucleotide sequence to 5' - TCTGAAGAAG - 3'?

Correct AnswerverifiedShow Answer

What substance is responsible for adding new nucleotides to a DNA strand during replication?

Correct AnswerverifiedShow Answer

What technique did Linus Pauling bring to determining molecular structures?

Correct AnswerverifiedShow Answer

The link between two ribose molecules in DNA is called ____________________.

Correct Answerverifiedthe phosph...View AnswerShow Answer

Describe how a double helix DNA prepares for replication.

Correct AnswerverifiedSince the base pairs hold the two strand...View AnswerShow Answer

During replication, the two strands of DNA unzip. Describe how a daughter strand is synthesized from a parent DNA strand.

Correct AnswerverifiedBecause the base pairings are so unique ...View AnswerShow Answer

What experimental technique was used to determine that DNA is a double helix?

Correct AnswerverifiedShow Answer

What is the new strand in a replicated DNA molecule called?

Correct AnswerverifiedShow Answer

In an X-ray diffraction experiment a sample is placed in the path of X-rays. What is seen on the photographic film?

Correct AnswerverifiedShow Answer

A cytochrome enzyme causes what change to benzopyrene?

Correct AnswerverifiedShow Answer

Correct Answer
verified
Using two strains of pneumococcus bacterium they purified the DNA from the S strain that causes pneumonia and discovered this DNA was capable of transforming the R strain into the S strain.

Correct Answer
verified
The structure is helical. The ...
View Answer

Correct Answer
verified
D

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
There are three components: ph...
View Answer

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
the phosph...
View Answer

Correct Answer
verified
Since the base pairs hold the two strand...
View Answer

Correct Answer
verified
Because the base pairings are so unique ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified