Question 1

​ Cytosine is a(n) _____ nitrogenous aromatic compound.

Accepted Answer

A)  one-ring 
B)  two-ring 
C)  four-ring 
D)  six-ring 
A)  one-ring 
B)  two-ring 
C)  four-ring 
D)  six-ring A

Question 2

Which conclusion can be drawn from the experimental observation that a single strand of DNA contains 2100 dA residues and 1800 dT residues?

Accepted Answer

A)  There must have been some loss of material in the extraction because the number of dA and dT residues must be the same. 
B)  This is a palindromic sequence. 
C)  There must be 2100 dT and 1800 dA residues on the complementary strand. 
D)  This must be prokaryotic DNA 
E)  None of these 
A)  There must have been some loss of material in the extraction because the number of dA and dT residues must be the same. 
B)  This is a palindromic sequence. 
C)  There must be 2100 dT and 1800 dA residues on the complementary strand. 
D)  This must be prokaryotic DNA 
E)  None of these C

Question 3

Which contains a phosphoanhydride bond?

Accepted Answer

A)  DNA 
B)  RNA 
C)  ATP 
D)  AMP 
E)  None of these 
A)  DNA 
B)  RNA 
C)  ATP 
D)  AMP 
E)  None of these C

Question 4

Which of the following statements concerning small nuclear RNA is true ?

Accepted Answer

A)  This RNA is usually found in snurps. 
B)  This RNA is involved in removing exons from the RNA. 
C)  This RNA was the first RNA shown to have catalytic activity. 
D)  This RNA is small in size. 
E)  All of these describe small nuclear RNA. 
A)  This RNA is usually found in snurps. 
B)  This RNA is involved in removing exons from the RNA. 
C)  This RNA was the first RNA shown to have catalytic activity. 
D)  This RNA is small in size. 
E)  All of these describe small nuclear RNA.

Question 5

The human genome is though to have about how many genes?

Accepted Answer

A)  10,000 
B)  25,000 
C)  50,000 
D)  100,000 
E)  None of these is close to the estimate 
A)  10,000 
B)  25,000 
C)  50,000 
D)  100,000 
E)  None of these is close to the estimate

Question 6

Base pairs with a propeller-twist

Accepted Answer

A)  are found only in Z-DNA 
B)  have optimum base stacking 
C)  bind water in the minor groove 
D)  have stronger hydrogen bonds than base pairs without a propeller twist 
A)  are found only in Z-DNA 
B)  have optimum base stacking 
C)  bind water in the minor groove 
D)  have stronger hydrogen bonds than base pairs without a propeller twist

Question 7

Deoxythymidylate (dT) is a:

Accepted Answer

A)  purine base 
B)  pyrimidine base 
C)  pyrimidine based nucleotide 
D)  purine based nucleotide 
E)  nucleoside 
A)  purine base 
B)  pyrimidine base 
C)  pyrimidine based nucleotide 
D)  purine based nucleotide 
E)  nucleoside

Question 8

Eukaryotic and prokaryotic ribosomes can be compared in all these ways, except :

Accepted Answer

A)  Both have large and small subunits. 
B)  Eukaryotic ribosomes are larger. 
C)  Both contain the same number of RNA molecules. 
D)  Eukaryotic ribosomes contain more proteins. 
E)  All of these statements are accurate comparisons. 
A)  Both have large and small subunits. 
B)  Eukaryotic ribosomes are larger. 
C)  Both contain the same number of RNA molecules. 
D)  Eukaryotic ribosomes contain more proteins. 
E)  All of these statements are accurate comparisons.

Question 9

Eukaryotic mRNA requires

Accepted Answer

A)  less processing after synthesis than prokaryotic mRNA. 
B)  more processing after synthesis than prokaryotic mRNA. 
C)  about the same amount of processing after synthesis as prokaryotic mRNA. 
A)  less processing after synthesis than prokaryotic mRNA. 
B)  more processing after synthesis than prokaryotic mRNA. 
C)  about the same amount of processing after synthesis as prokaryotic mRNA.

Question 10

Which best describes the relationship between the nucleobases in a piece of DNA?

Accepted Answer

A)  They are parallel to the helical axis. 
B)  They are perpendicular to the helical axis. 
C)  They are randomly oriented with respect to the helical axis. 
D)  They are covalently bonded between the nucleobases across from one anothr in the two DNA strands 
E)  The four nucleobases are present in equal quanitites in a piece of DNA 
A)  They are parallel to the helical axis. 
B)  They are perpendicular to the helical axis. 
C)  They are randomly oriented with respect to the helical axis. 
D)  They are covalently bonded between the nucleobases across from one anothr in the two DNA strands 
E)  The four nucleobases are present in equal quanitites in a piece of DNA

Question 11

Which of the following is the most distinguishing difference between a purine and a pyrymidine

Accepted Answer

A)  purines are found in DNA while pyrimidines are found in RNA 
B)  purines have nitrogens in the rings while pyrimidines do not 
C)  pyrimidines have nitrogens in the rings while purines do not 
D)  purines are found in RNA while pyrimidines are found in DNA 
E)  purines are double ring structures while pyrimidines have a single ring 
A)  purines are found in DNA while pyrimidines are found in RNA 
B)  purines have nitrogens in the rings while pyrimidines do not 
C)  pyrimidines have nitrogens in the rings while purines do not 
D)  purines are found in RNA while pyrimidines are found in DNA 
E)  purines are double ring structures while pyrimidines have a single ring

Question 12

In DNA structure, hydrophobic bonding via pi-clouds is referred to as

Accepted Answer

A)  base stacking. 
B)  propeller twist. 
C)  hyperchromicity. 
D)  supercoiling. 
E)  denaturation 
A)  base stacking. 
B)  propeller twist. 
C)  hyperchromicity. 
D)  supercoiling. 
E)  denaturation

Question 13

Which piece of DNA will have the higher Tm, one with a cytosine plus guanine content of 30% or one with a cytosine plus guanine content of 50% if both are heated under the same experimental conditions?

Accepted Answer

A)  30% cytosine plus guanine will have the higher Tm. 
B)  50% cytosine plus guanine will have the higher Tm. 
C)  Their Tm's will be the same. 
D)  There's no way to predict for this information. 
A)  30% cytosine plus guanine will have the higher Tm. 
B)  50% cytosine plus guanine will have the higher Tm. 
C)  Their Tm's will be the same. 
D)  There's no way to predict for this information.

Question 14

The fundamental differences between RNA and DNA are

Accepted Answer

A)  the organic bases only 
B)  bases, ribose units, and the phosphodiester linkage 
C)  bases, ribose units, and the glycosidic bond type 
D)  bases and the ribose units only 
A)  the organic bases only 
B)  bases, ribose units, and the phosphodiester linkage 
C)  bases, ribose units, and the glycosidic bond type 
D)  bases and the ribose units only

Question 15

Which of the following sequences of DNA is most likely to form Z-DNA?

Accepted Answer

A)  5'-ATCTACATCTACATAGATAT-3' 3'-TAGATGTAGATGTATCTATA-5' 
B)  5'-AAAAAAAAAAAAAAAAAAAA-3' 3'-TTTTTTTTTTTTTTTTTTTT-5' 
C)  5'-GCGCGCGCGCGCCGCGCGCG-3' 3'-CGCGCGCGCGCGCGCGCGCG-5' 
D)  5'-GGGGGGGGGGGGGGGGGGGG-3' 3'-CCCCCCCCCCCCCCCCCCCC-5' 
A)  5'-ATCTACATCTACATAGATAT-3' 3'-TAGATGTAGATGTATCTATA-5' 
B)  5'-AAAAAAAAAAAAAAAAAAAA-3' 3'-TTTTTTTTTTTTTTTTTTTT-5' 
C)  5'-GCGCGCGCGCGCCGCGCGCG-3' 3'-CGCGCGCGCGCGCGCGCGCG-5' 
D)  5'-GGGGGGGGGGGGGGGGGGGG-3' 3'-CCCCCCCCCCCCCCCCCCCC-5'

Question 16

Histones are proteins that

Accepted Answer

A)  are frequently associated with eukaryotic DNA 
B)  are frequently associated with prokaryotic DNA 
C)  are never found in association with DNA 
D)  contain a high percentage of residues with carboxylic acid side chains 
E)  None of these 
A)  are frequently associated with eukaryotic DNA 
B)  are frequently associated with prokaryotic DNA 
C)  are never found in association with DNA 
D)  contain a high percentage of residues with carboxylic acid side chains 
E)  None of these

Question 17

What distinguishes nucleotides from nucleosides?

Accepted Answer

A)  Nucleosides lack the phosphate group. 
B)  Nucleosides lack the sugar group. 
C)  Nucleosides lack a nitrogenous base. 
D)  The two words are synonymous 
A)  Nucleosides lack the phosphate group. 
B)  Nucleosides lack the sugar group. 
C)  Nucleosides lack a nitrogenous base. 
D)  The two words are synonymous

Question 18

Deoxyadenylate (dA) is a:

Accepted Answer

A)  purine base 
B)  pyrimidine base 
C)  purine based nucleoside 
D)  purine based nucleotide 
E)  pyrimidine based nucleotide 
A)  purine base 
B)  pyrimidine base 
C)  purine based nucleoside 
D)  purine based nucleotide 
E)  pyrimidine based nucleotide

Question 19

Protein synthesis can occur while the mRNA molecule is being synthesized in:

Accepted Answer

A)  Prokaryotes only. 
B)  Eukaryotes only. 
C)  Unicellular organisms only. 
D)  Multicellular organisms only. 
E)  Plants but not animals 
A)  Prokaryotes only. 
B)  Eukaryotes only. 
C)  Unicellular organisms only. 
D)  Multicellular organisms only. 
E)  Plants but not animals

Question 20

The three-dimensional structure of transfer RNA has been determined by

Accepted Answer

A)  analytical ultracentrifugation 
B)  gel electrophoresis 
C)  ultraviolet spectroscopy 
D)  x-ray crystallography 
A)  analytical ultracentrifugation 
B)  gel electrophoresis 
C)  ultraviolet spectroscopy 
D)  x-ray crystallography

Exam 9: Nucleic Acids How Structure Conveys Information

​ Cytosine is a(n) _____ nitrogenous aromatic compound.

Which conclusion can be drawn from the experimental observation that a single strand of DNA contains 2100 dA residues and 1800 dT residues?

Which contains a phosphoanhydride bond?

Which of the following statements concerning small nuclear RNA is true ?

The human genome is though to have about how many genes?

Base pairs with a propeller-twist

Deoxythymidylate (dT) is a:

Eukaryotic and prokaryotic ribosomes can be compared in all these ways, except :

Eukaryotic mRNA requires

Which best describes the relationship between the nucleobases in a piece of DNA?

Which of the following is the most distinguishing difference between a purine and a pyrymidine

In DNA structure, hydrophobic bonding via pi-clouds is referred to as

Which piece of DNA will have the higher Tm, one with a cytosine plus guanine content of 30% or one with a cytosine plus guanine content of 50% if both are heated under the same experimental conditions?

The fundamental differences between RNA and DNA are

Which of the following sequences of DNA is most likely to form Z-DNA?

Histones are proteins that

What distinguishes nucleotides from nucleosides?

Deoxyadenylate (dA) is a:

Protein synthesis can occur while the mRNA molecule is being synthesized in:

The three-dimensional structure of transfer RNA has been determined by

Biochemistry and the Organization of Cells

Water the Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins Enzymes

The Behavior of Proteins Enzymes Mechanisms and Control

Lipids and Proteins Are Associated in Biological Membranes

Biosynthesis of Nucleic Acids Replication

Transcription of the Genetic Code the Biosynthesis of Rna

Protein Synthesis Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses Cancer and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism Cellular Signaling

Filters

Cytosine is a(n) _____ nitrogenous aromatic compound.

Which piece of DNA will have the higher T_m, one with a cytosine plus guanine content of 30% or one with a cytosine plus guanine content of 50% if both are heated under the same experimental conditions?