Question 1

Franklin's work provided which of the following regarding the structure of DNA?

Accepted Answer

A)  It had a helical structure 
B)  The helix had more than one strand 
C)  The helix contained about 10 bases per turn 
D)  All of the answers are correct 
A)  It had a helical structure 
B)  The helix had more than one strand 
C)  The helix contained about 10 bases per turn 
D)  All of the answers are correct

Question 2

The first group of researchers to correctly identify the double-helix structure of DNA were .

Accepted Answer

A)  McClintock and Franklin 
B)  Hershey and Chase 
C)  Pauling and Avery 
D)  Watson and Crick 
A)  McClintock and Franklin 
B)  Hershey and Chase 
C)  Pauling and Avery 
D)  Watson and Crick

Question 3

The researcher(s) who initially used X-ray diffraction to gather information on the DNA molecule was .

Accepted Answer

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

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

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

Question 6

A purine on one strand of the DNA is always paired with a pyrimidine on the other strand.

Accepted Answer

A) True 
 B)False

Question 7

Adenine and thymine form hydrogen bonds between them, while cytosine and guanine form bonds.

Accepted Answer

A)  2 , 3 
B)  3 , 4 
C)  3 , 2 
D)  4 , 3 
A)  2 , 3 
B)  3 , 4 
C)  3 , 2 
D)  4 , 3

Question 8

Which of the following is correct regarding the Hershey-Chase experiments?

Accepted Answer

A)  They radioactively labeled the protein coat of the bacteriophage with 35S 
B)  They radioactively labeled the DNA of the bacteriophage with 32P 
C)  The results of the experiment indicated only the presence of 32P in the cell 
D)  Their results suggested that the DNA is the genetic material 
E)  All of the answers are correct 
A)  They radioactively labeled the protein coat of the bacteriophage with 35S 
B)  They radioactively labeled the DNA of the bacteriophage with 32P 
C)  The results of the experiment indicated only the presence of 32P in the cell 
D)  Their results suggested that the DNA is the genetic material 
E)  All of the answers are correct

Question 9

DNA differs from RNA in which of the following ways?

Accepted Answer

A)  The structure of the nucleotide 
B)  The five-carbon sugar it uses 
C)  The size of the phosphate groups 
D)  The number of bases attached to the sugar 
E)  All of the answers are correct 
A)  The structure of the nucleotide 
B)  The five-carbon sugar it uses 
C)  The size of the phosphate groups 
D)  The number of bases attached to the sugar 
E)  All of the answers are correct

Question 10

How many bases are necessary to complete one complete twist (360 degrees) of a DNA helix?

Accepted Answer

A)  5 
B)  10 
C)  100 
D)  1000 
A)  5 
B)  10 
C)  100 
D)  1000

Question 11

Frederick Griffith is responsible for discovering what process?

Accepted Answer

A)  Replication 
B)  Transmission 
C)  Transformation 
D)  Transduction 
A)  Replication 
B)  Transmission 
C)  Transformation 
D)  Transduction

Question 12

These individuals determined that DNA was responsible for the process of transduction in T2 phage.

Accepted Answer

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

Question 13

Which of the following is incorrect regarding the T2 bacteriophage?

Accepted Answer

A)  It requires a host cell for replication 
B)  The phage attaches to the cell wall of a target bacteria 
C)  The phages injects the protein coat into the host cell 
D)  The new phages are formed inside the host cell 
E)  The new phages are released by the process of lysis 
A)  It requires a host cell for replication 
B)  The phage attaches to the cell wall of a target bacteria 
C)  The phages injects the protein coat into the host cell 
D)  The new phages are formed inside the host cell 
E)  The new phages are released by the process of lysis

Question 14

The idea that the adenine and thymine bases of the DNA interact in some manner was first proposed by .

Accepted Answer

A)  Watson and Crick 
B)  Franklin 
C)  Pauling 
D)  Chargaff 
A)  Watson and Crick 
B)  Franklin 
C)  Pauling 
D)  Chargaff

Question 15

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 
A)  Adenine 
B)  Guanine 
C)  Thymine 
D)  Cytosine

Question 16

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

Question 17

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

Question 18

Which of the following is a left-handed DNA molecule?

Accepted Answer

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

Question 19

Which of the following DNA forms is most common in living organisms?

Accepted Answer

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

Question 20

One of the early models of DNA structure had the two strands of the helix interacting using ions.

Accepted Answer

A)  potassium 
B)  sodium 
C)  magnesium 
D)  chlorine 
A)  potassium 
B)  sodium 
C)  magnesium 
D)  chlorine

Exam 9: Molecular Structure of Dna and Rna

Franklin's work provided which of the following regarding the structure of DNA?

The first group of researchers to correctly identify the double-helix structure of DNA were .

The researcher(s) who initially used X-ray diffraction to gather information on the DNA molecule was .

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

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

A purine on one strand of the DNA is always paired with a pyrimidine on the other strand.

Adenine and thymine form hydrogen bonds between them, while cytosine and guanine form bonds.

Which of the following is correct regarding the Hershey-Chase experiments?

DNA differs from RNA in which of the following ways?

How many bases are necessary to complete one complete twist (360 degrees) of a DNA helix?

Frederick Griffith is responsible for discovering what process?

These individuals determined that DNA was responsible for the process of transduction in T2 phage.

Which of the following is incorrect regarding the T2 bacteriophage?

The idea that the adenine and thymine bases of the DNA interact in some manner was first proposed by .

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

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

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

Which of the following is a left-handed DNA molecule?

Which of the following DNA forms is most common in living organisms?

One of the early models of DNA structure had the two strands of the helix interacting using ions.

Overview of Genetics

Mendelian Inheritance

Reproduction and Chromosome Transmission

Extensions of Mendelian Inheritance

Non-Mendelian Inheritance

Genetic Linkage and Mapping in Eukaryotes

Genetic Transfer and Mapping in Bacteria and

Variation in Chromosome Structure and Number

Chromosome Organization and Molecular Structure

Dna Replication

Gene Transcription and Rna Modification

Translation of Mrna

Gene Regulation in Bacteria and Bacteriophages

Gene Regulation in Eukaryotes

Gene Mutation and Dna Repair

Recombination and Transposition at the Molecular

Recombinant Dna Technology

Biotechnology

Genomics I: Analysis of Dna

Genomics II: Functional Genomics, Proteomics, and

Medical Genetics and Cancer

Developmental Genetics

Population Genetics

Quantitative Genetics

Evolutionary Genetics

Filters