0 [{"id":340912,"quiz_id":"17269","answer_id":null,"answerType_id":"0","created_at":"2017-12-16 00:47:42","updated_at":"2017-12-16 01:39:45","questionName":"Chargaff found that for DNA _____.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":2,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":340911,"quiz_id":"17269","answer_id":null,"answerType_id":"0","created_at":"2017-12-16 00:47:42","updated_at":"2017-12-16 01:39:45","questionName":"Monomers for the synthesis of DNA are called _____.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":1,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":340913,"quiz_id":"17269","answer_id":null,"answerType_id":"0","created_at":"2017-12-16 00:47:42","updated_at":"2017-12-16 01:39:45","questionName":"What technique was most helpful to Watson and Crick in developing their model for the structure of DNA?","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":3,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":340921,"quiz_id":"17269","answer_id":null,"answerType_id":"0","created_at":"2017-12-16 00:47:42","updated_at":"2017-12-16 01:39:45","questionName":"At each end of a DNA replication bubble is _____.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":11,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":340910,"quiz_id":"17269","answer_id":null,"answerType_id":"0","created_at":"2017-12-16 00:47:42","updated_at":"2017-12-16 01:39:45","questionName":"A scientist assembles a bacteriophage with the protein coat of phage T2 and the DNA of phage T4. 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The complementary base sequence on the other strand of DNA will be 3\u2032-_____-5\u2032.","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":14,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null},{"id":340919,"quiz_id":"17269","answer_id":null,"answerType_id":"0","created_at":"2017-12-16 00:47:42","updated_at":"2017-12-16 01:39:45","questionName":"Which of the following attributes of DNA is most crucial to its accurate duplication?","questionTimeSeconds":"0","questionTimeMinutes":"2","questionImagePath":null,"position":9,"explanation":null,"question_score_id":null,"lang":null,"questionAudioPath":null}]

block

Chargaff found that for DNA _____.

Select the correct answer(s).  

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the ratio of A to T is close to 1:1 and the ratio of G to C is close to 1:1

the ratio of A to G is close to 1:1 and the ratio of T to C is close to 1:1

A + T = G + C

the ratio of A to C is close to 1:1 and the ratio of G to T is close to 1:1

A + T = 50% of the total bases

none

Monomers for the synthesis of DNA are called _____.

Select the correct answer(s).  

(0/0)

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monosaccharides

fatty acids

amino acids

disaccharides

nucleotides

none

What technique was most helpful to Watson and Crick in developing their model for the structure of DNA?

Select the correct answer(s).  

(0/0)

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radioactive labeling

cloned DNA

transgenic animals

electrophoresis

X-ray crystallography

none

At each end of a DNA replication bubble is _____.

Select the correct answer(s).  

(0/0)

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an origin of replication

a replication fork

a ribosome

a gene

a telomere

none

A scientist assembles a bacteriophage with the protein coat of phage T2 and the DNA of phage T4. If this composite phage were allowed to infect a bacterium, the phages produced in the host cell would have _____.

Select the correct answer(s).  

(0/0)

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the protein of T4 and the DNA of T2

a mixture of the DNA and proteins of both phages

the protein and DNA of T2

the protein of T2 and the DNA of T4

the protein and DNA of T4

none

The two strands of a DNA double helix are antiparallel. This means that _____.

Select the correct answer(s).  

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they both run in the 3' to 5' direction

one strand is actually composed of RNA

the two strands are mirror images

only one of the two strands can be used as a template for replication, because DNA polymerase only works in one direction

one strand runs in the 5' to 3' direction, and the other runs in the 3' to 5' direction

none

During the replication of DNA, _____.

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errors never occur

only one strand of the molecule acts as a template

the cell undergoes mitosis

the reaction is catalyzed by RNA polymerase

both strands of a molecule act as templates

none

The information in DNA is contained in _____.

Select the correct answer(s).  

(0/0)

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the variation in the structure of nucleotides that make up the DNA molecule

the sequence of nucleotides along the length of the two strands of the DNA molecule

All of the listed responses are correct.

the sequence of amino acids that makes up the DNA molecule

the types of sugars used in making the DNA molecule

none

The role of DNA polymerases in DNA replication is to _____.

Select the correct answer(s).  

(0/0)

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synthesize an RNA primer to initiate DNA strand synthesis

attach free nucleotides to the new DNA strand

All of the listed responses are correct.

separate the two strands of DNA

link together short strands of DNA

none

In DNA, the two purines are _____, and the two pyrimidines are _____.

Select the correct answer(s).  

(0/0)

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adenine and guanine ... cytosine and thymine

cytosine and guanine ... adenine and thymine

adenine and thymine ... cytosine and guanine

cytosine and thymine ... adenine and guanine

adenine and cytosine ... guanine and thymine

none

The two sugar-phosphate strands that form the rungs of a DNA double helix are joined to each other through _____.

Select the correct answer(s).  

(0/0)

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ionic bonds between guanine and cytosine

covalent bonds between nitrogen atoms in adenine and in thymine

hydrogen bonds between nucleotide bases

covalent bonds between carbon atoms in deoxyribose molecules

5' deoxyribose and phosphate bonds

none

Who is credited with explaining the structure of the DNA double helix?

Select the correct answer(s).  

(0/0)

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Jacob and Monod

Griffith

Watson and Crick

Avery, McCarty, and MacLeod

Hershey and Chase

none

Which of the following is correct?

Select the correct answer(s).  

(0/0)

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Adenine forms two covalent bonds with thymine; guanine forms three covalent bonds with cytosine.

Adenine forms two hydrogen bonds with thymine; guanine forms three hydrogen bonds with cytosine.

Adenine forms three covalent bonds with thymine; guanine forms two covalent bonds with cytosine.

Adenine forms two hydrogen bonds with guanine; thymine forms three hydrogen bonds with cytosine.

Adenine forms three hydrogen bonds with thymine; guanine forms two hydrogen bonds with cytosine.

none

One strand of a DNA molecule has the base sequence 5′-ATAGGT-3′. The complementary base sequence on the other strand of DNA will be 3′-_____-5′.

Select the correct answer(s).  

(0/0)

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TGGAUA

TGGATA

TATCCA

UAUCCA

ATAGGT

none

Which of the following attributes of DNA is most crucial to its accurate duplication?

Select the correct answer(s).  

(0/0)

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its helical nature and hydrogen bonding

its phosphodiester linkages and complementary strands

its deoxyribose sugar and phosphate groups

its specific sequence of bases

its specific base pairing and hydrogen bonding