4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
Biol 1002 - Spring 2013 Signed in as Nora Trejos Help Close
The Molecular Basis of Inheritance &a... Resources
The Molecular Basis of Inheritance & From Gene to Protein
Due: 9:00am on Wednesday, April 24, 2013
Note: You will receive no credit for late submissions. To learn more, read your instructor's Grading Policy
Activity: DNA and RNA Structure
Click here to complete this activity.
Then answer the questions.
Part A
In the accompanying image, a nucleotide is indicated by the letter _____.
ANSWER:
B
D
E
C
A
Correct
B is indicating a single nucleotide.
Part B
Which of these is a difference between a DNA and an RNA molecule?
ANSWER:
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 1/35
,4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
DNA is a polymer composed of nucleotides, whereas RNA is a polymer composed of nucleic acids.
DNA contains five-carbon sugars, whereas RNA contains six-carbon sugars.
DNA contains uracil, whereas RNA contains thymine.
DNA is double-stranded, whereas RNA is single-stranded.
DNA contains nitrogenous bases, whereas RNA contains phosphate groups.
Correct
(With some exceptions) DNA is a double-stranded molecule and RNA is a single-stranded molecule.
Part C
This is an image of a(n) _____.
ANSWER:
nucleic acid
amino acid
nucleotide
none of the above
thiol
Correct
Nucleotides are composed of a pentose sugar, a nitrogenous base, and a phosphate group.
Part D
The letter A indicates a _____.
ANSWER:
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 2/35
,4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
phosphate group
nitrogenous base
sugar
none of the above
nucleotide
Correct
Phosphate groups contain phosphorus..
Part E
A nitrogenous base is indicated by the letter _____.
ANSWER:
B
E
D
C
A
Correct
This is a nitrogenous base.
Part F
You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide because you see a _____.
ANSWER:
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 3/35
, 4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
thymine nitrogenous base, not a uracil nitrogenous base
phosphate group, not a uracil
double-stranded molecule, not a single-stranded molecule
sugar with two, and not three, oxygen atoms
uracil nitrogenous base, not a thymine nitrogenous base
Correct
DNA nucleotides are composed of deoxyribose sugars, whereas RNA nucleotides are composed of ribose sugars.
Part G
Which of these nitrogenous bases is found in DNA but not in RNA?
ANSWER:
cytosine
uracil
adenine
guanine
thymine
Correct
DNA contains thymine; RNA does not.
Part H
Which of these is(are) pyrimidines?
ANSWER:
B, C, and D
A and B
B and C
C, D, and E
A, B, and C
Correct
Pyrimidines are single-ring structures.
Part I
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 4/35
Biol 1002 - Spring 2013 Signed in as Nora Trejos Help Close
The Molecular Basis of Inheritance &a... Resources
The Molecular Basis of Inheritance & From Gene to Protein
Due: 9:00am on Wednesday, April 24, 2013
Note: You will receive no credit for late submissions. To learn more, read your instructor's Grading Policy
Activity: DNA and RNA Structure
Click here to complete this activity.
Then answer the questions.
Part A
In the accompanying image, a nucleotide is indicated by the letter _____.
ANSWER:
B
D
E
C
A
Correct
B is indicating a single nucleotide.
Part B
Which of these is a difference between a DNA and an RNA molecule?
ANSWER:
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 1/35
,4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
DNA is a polymer composed of nucleotides, whereas RNA is a polymer composed of nucleic acids.
DNA contains five-carbon sugars, whereas RNA contains six-carbon sugars.
DNA contains uracil, whereas RNA contains thymine.
DNA is double-stranded, whereas RNA is single-stranded.
DNA contains nitrogenous bases, whereas RNA contains phosphate groups.
Correct
(With some exceptions) DNA is a double-stranded molecule and RNA is a single-stranded molecule.
Part C
This is an image of a(n) _____.
ANSWER:
nucleic acid
amino acid
nucleotide
none of the above
thiol
Correct
Nucleotides are composed of a pentose sugar, a nitrogenous base, and a phosphate group.
Part D
The letter A indicates a _____.
ANSWER:
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 2/35
,4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
phosphate group
nitrogenous base
sugar
none of the above
nucleotide
Correct
Phosphate groups contain phosphorus..
Part E
A nitrogenous base is indicated by the letter _____.
ANSWER:
B
E
D
C
A
Correct
This is a nitrogenous base.
Part F
You can tell that this is an image of a DNA nucleotide and not an RNA nucleotide because you see a _____.
ANSWER:
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 3/35
, 4/24/13 The Molecular Basis of Inheritance & From Gene to Protein
thymine nitrogenous base, not a uracil nitrogenous base
phosphate group, not a uracil
double-stranded molecule, not a single-stranded molecule
sugar with two, and not three, oxygen atoms
uracil nitrogenous base, not a thymine nitrogenous base
Correct
DNA nucleotides are composed of deoxyribose sugars, whereas RNA nucleotides are composed of ribose sugars.
Part G
Which of these nitrogenous bases is found in DNA but not in RNA?
ANSWER:
cytosine
uracil
adenine
guanine
thymine
Correct
DNA contains thymine; RNA does not.
Part H
Which of these is(are) pyrimidines?
ANSWER:
B, C, and D
A and B
B and C
C, D, and E
A, B, and C
Correct
Pyrimidines are single-ring structures.
Part I
session.masteringbiology.com/myct/assignmentPrintView?assignmentID=1937216 4/35
