Question 1

Which of the following bonds hold the complementary base pairs of DNA together?

Accepted Answer

A)  covalent bonds 
B)  anhydride bonds 
C)  hydrogen bonds 
D)  ionic bonds 
A)  covalent bonds 
B)  anhydride bonds 
C)  hydrogen bonds 
D)  ionic bonds

Question 2

Which of the following diseases is treated using micro RNAs?

Accepted Answer

A)  AIDS 
B)  Sickle-cell anemia 
C)  Hepatitis C 
D)  Cystic fibrosis 
A)  AIDS 
B)  Sickle-cell anemia 
C)  Hepatitis C 
D)  Cystic fibrosis

Question 3

Which of the following experimental techniques is used in DNA fingerprinting?

Accepted Answer

A)  centrifugation 
B)  diffraction 
C)  electrophoresis 
D)  inking 
A)  centrifugation 
B)  diffraction 
C)  electrophoresis 
D)  inking

Question 4

At which point on a DNA molecule are the two DNA strands separated so that replication can proceed?

Accepted Answer

A)  at the Okazaki fragment 
B)  at the replication primer 
C)  at the replication fork 
D)  at the RNA fork 
A)  at the Okazaki fragment 
B)  at the replication primer 
C)  at the replication fork 
D)  at the RNA fork

Question 5

Which of the following are identical in DNA and RNA?

Accepted Answer

A)  the double-stranded structure 
B)  the identity of the bases 
C)  the identity of the sugar 
D)  the sugar-to-phosphate linkages 
A)  the double-stranded structure 
B)  the identity of the bases 
C)  the identity of the sugar 
D)  the sugar-to-phosphate linkages

Question 6

Which of the following scientists discovered the polymerase chain reaction (PCR)?

Accepted Answer

A)  C. Anfinsen 
B)  B. Blumberg 
C)  K. Mullis 
D)  L. Pauling 
A)  C. Anfinsen 
B)  B. Blumberg 
C)  K. Mullis 
D)  L. Pauling

Question 7

What is the approximate molecular weight of a ribosome?

Accepted Answer

A)  1 × 108 amu 
B)  5 × 105 amu 
C)  1 × 106 amu 
D)  5 × 106 amu 
A)  1 × 108 amu 
B)  5 × 105 amu 
C)  1 × 106 amu 
D)  5 × 106 amu

Question 8

Which of the following properly describes processes that occur in prokaryotes and eukaryotes?

Accepted Answer

A)  In both prokaryotes and eukaryotes, transcription and protein synthesis occur simultaneously. 
B)  In neither prokaryotes nor eukaryotes do transcription and protein synthesis occur simultaneously. 
C)  In eukaryotes, transcription and protein synthesis occur simultaneously, but in prokaryotes, these processes occur sequentially and in different regions. 
D)  In prokaryotes, transcription and protein synthesis occur simultaneously, but in eukaryotes, these processes occur sequentially and in different regions. 
A)  In both prokaryotes and eukaryotes, transcription and protein synthesis occur simultaneously. 
B)  In neither prokaryotes nor eukaryotes do transcription and protein synthesis occur simultaneously. 
C)  In eukaryotes, transcription and protein synthesis occur simultaneously, but in prokaryotes, these processes occur sequentially and in different regions. 
D)  In prokaryotes, transcription and protein synthesis occur simultaneously, but in eukaryotes, these processes occur sequentially and in different regions.

Question 9

Which of the following diseases is being studied for the use of siRNA drugs?

Accepted Answer

A)  Sickle cell anemia 
B)  Ebola virus disease 
C)  Malaria 
D)  Tuberculosis 
A)  Sickle cell anemia 
B)  Ebola virus disease 
C)  Malaria 
D)  Tuberculosis

Question 10

Which of the following is not found in chromatin?

Accepted Answer

A)  DNA 
B)  histones 
C)  nonhistone proteins 
D)  none of these 
A)  DNA 
B)  histones 
C)  nonhistone proteins 
D)  none of these

Question 11

Which of the following statements describes the large ribosomal subunit?

Accepted Answer

A)  It consists of four molecules of rRNA and approximately 20 different proteins 
B)  It consists of four or five molecules of RNA and 10-15 different proteins. 
C)  It consists of two molecules of rRNA and 20 different proteins. 
D)  It consists of two or three molecules of RNA and 35-50 different proteins. 
A)  It consists of four molecules of rRNA and approximately 20 different proteins 
B)  It consists of four or five molecules of RNA and 10-15 different proteins. 
C)  It consists of two molecules of rRNA and 20 different proteins. 
D)  It consists of two or three molecules of RNA and 35-50 different proteins.

Question 12

Which of the following statements is true of mRNA?

Accepted Answer

A)  It contains 73-93 nucleotides per chain. 
B)  It is produced in the ribosomes of a cell during a process called translation. 
C)  It is a long-lived molecule. 
D)  Its nucleotide sequence is complementary to that of a DNA strand being transcribed. 
A)  It contains 73-93 nucleotides per chain. 
B)  It is produced in the ribosomes of a cell during a process called translation. 
C)  It is a long-lived molecule. 
D)  Its nucleotide sequence is complementary to that of a DNA strand being transcribed.

Question 13

Which type of RNA has a protective function in many species?

Accepted Answer

A)  tRNA 
B)  rRNA 
C)  siRNA 
D)  snRNA 
A)  tRNA 
B)  rRNA 
C)  siRNA 
D)  snRNA

Question 14

Which of the following is a function of snRNAs?

Accepted Answer

A)  They process initial mRNA to its mature form in eukaryotes. 
B)  They transport amino acids to the site of protein synthesis. 
C)  They combine with proteins to form ribosomes. 
D)  They transfer mRNA from cytoplasm to the nucleus. 
A)  They process initial mRNA to its mature form in eukaryotes. 
B)  They transport amino acids to the site of protein synthesis. 
C)  They combine with proteins to form ribosomes. 
D)  They transfer mRNA from cytoplasm to the nucleus.

Question 15

Identify a purine base.

Accepted Answer

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

Question 16

Which of the following occurs when DNA is transcribed to mRNA?

Accepted Answer

A)  Both the exons and introns are transcribed in sequence. 
B)  Both the exons and introns are transcribed, but their sequence is changed. 
C)  Only the exons are transcribed. 
D)  Only the introns are transcribed. 
A)  Both the exons and introns are transcribed in sequence. 
B)  Both the exons and introns are transcribed, but their sequence is changed. 
C)  Only the exons are transcribed. 
D)  Only the introns are transcribed.

Question 17

Examine the following structural formula containing guanine, a sugar, and phosphate groups.   Which of the following is the name of this substance?

Accepted Answer

A)  dGTP 
B)  GTP 
C)  dGDP 
D)  GDP 
A)  dGTP 
B)  GTP 
C)  dGDP 
D)  GDP

Question 18

Which of the following interactions holds DNA and histones together in nucleosomes?

Accepted Answer

A)  covalent bonds 
B)  anhydride bonds 
C)  hydrogen bonds 
D)  ionic forces 
A)  covalent bonds 
B)  anhydride bonds 
C)  hydrogen bonds 
D)  ionic forces

Question 19

Where are genes located in a eukaryotic cell?

Accepted Answer

A)  in the Golgi apparatus 
B)  in the endoplasmic reticulum 
C)  in the plasma membrane 
D)  in the chromosomes 
A)  in the Golgi apparatus 
B)  in the endoplasmic reticulum 
C)  in the plasma membrane 
D)  in the chromosomes

Question 20

How many DNA base pairs are wound around the histone core of a nucleosome?

Accepted Answer

A)  47 
B)  97 
C)  147 
D)  197 
A)  47 
B)  97 
C)  147 
D)  197

Exam 24: Nucleotides, Nucleic Acids, and Heredity

Which of the following bonds hold the complementary base pairs of DNA together?

Which of the following diseases is treated using micro RNAs?

Which of the following experimental techniques is used in DNA fingerprinting?

At which point on a DNA molecule are the two DNA strands separated so that replication can proceed?

Which of the following are identical in DNA and RNA?

Which of the following scientists discovered the polymerase chain reaction (PCR)?

What is the approximate molecular weight of a ribosome?

Which of the following properly describes processes that occur in prokaryotes and eukaryotes?

Which of the following diseases is being studied for the use of siRNA drugs?

Which of the following is not found in chromatin?

Which of the following statements describes the large ribosomal subunit?

Which of the following statements is true of mRNA?

Which type of RNA has a protective function in many species?

Which of the following is a function of snRNAs?

Identify a purine base.

Which of the following occurs when DNA is transcribed to mRNA?

Examine the following structural formula containing guanine, a sugar, and phosphate groups. Which of the following is the name of this substance?

Which of the following interactions holds DNA and histones together in nucleosomes?

Where are genes located in a eukaryotic cell?

How many DNA base pairs are wound around the histone core of a nucleosome?

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Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

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