Question 1

UV light can cause the formation of ____.

Accepted Answer

A)  cytosine dimers only
B)  thymine dimers only
C)  adenine dimers only
D)  cytosine or thymine dimers
E)  cytosine, thymine, or adenine dimers

Question 2

Match the nucleotide to its correct description.
-This nucleotide is a double-ringed molecule.

Accepted Answer

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

Question 3

Describe the difference between a replication error and a mutation.

Accepted Answer

A replication error occurs during the pr...

Question 4

Which example of complementary base pairing is correct?​

Accepted Answer

A)  ​G to G
B)  ​A to C
C)  ​pyrimidine to pyrimidine
D)  ​purine to purine
E)  ​purine to pyrimidine

Question 5

Which statement correctly describes mutations and their repairs?​

Accepted Answer

A)  ​DNA polymerase makes very few mistakes during DNA replication.
B)  ​DNA polymerase can correct mistakes made during DNA replication.
C)  ​Mutations only occur during DNA replication.
D)  ​DNA polymerase can easily copy damaged DNA.
E)  ​Repair enzymes can fix a mutation after the altered DNA strand has been replicated.

Question 6

Proofreading by DNA polymerase must occur before the end of ____ to prevent mistakes from becoming mutations.

Accepted Answer

A)  cell division
B)  chromatid duplication
C)  transcription
D)  translation
E)  DNA replication

Question 7

​During DNA replication, DNA polymerase catalyzes the formation of a bond between the ____ group on the 3′ carbon at the end of a DNA strand and the ____ group on a nucleotide's 5′ carbon.

Accepted Answer

A)  ​phosphate; hydroxyl
B)  ​hydroxyl; phosphate
C)  ​phosphate; sulfur
D)  ​hydroxyl; sulfur
E)  ​sulfur; phosphate

Question 8

Match each definition to the correct term.​
-​nucleosome

Accepted Answer

A)  ​composed of nitrogen-containing base, sugar, and phosphate group(s) 
B)  ​a genetic copy
C)  ​chromosome that does not determine sex
D)  ​DNA wrapped around histones
E)  ​fills in gaps between nucleotides; seals breaks in a DNA strandF) ​having two of each type of chromosomeG) ​adds nucleotides to a growing DNA strand

Question 9

The building blocks of nucleic acids are ____.

Accepted Answer

A)  amino acids
B)  fatty acids
C)  monosaccharides
D)  nucleotides
E)  lipids

Question 10

​In a DNA molecule, cytosine binds to ____ by ____ hydrogen bonds.

Accepted Answer

A)  ​thymine; two
B)  ​adenine; two
C)  ​adenine; three
D)  ​guanine; two
E)  ​guanine; three

Question 11

Mutations ____.​

Accepted Answer

A)  ​are always dangerous
B)  ​can only occur in sperm or egg cells
C)  ​can only occur in somatic cells
D)  ​produce clones
E)  ​can alter any part of the cell's DNA

Question 12

When Avery and McCarty were attempting to identify the substance involved transferring hereditary material, they tested the ability of a bacterial S cell extract to transform R cells after different components of the extract were degraded by enzymes. Which treatment inhibited the ability of the S cell extract to transform R cells?

Accepted Answer

A)  DNA-degrading enzymes
B)  RNA-degrading enzymes
C)  protein-degrading enzymes
D)  lipid-degrading enzymes
E)  amino acid-degrading enzymes

Question 13

Bacteriophages are ____.

Accepted Answer

A)  bacteria
B)  DNA-degrading enzymes
C)  viruses
D)  cellular components
E)  chromosomes

Question 14

A human karyotype showing 22 pairs of autosomes plus two X chromosomes indicates a(n)  ____.

Accepted Answer

A)  normal male
B)  normal female
C)  abnormal male
D)  abnormal female
E)  human whose sex cannot be determined

Question 15

Which scientist(s)  identified the transforming substance involved in changing R bacteria to S bacteria?

Accepted Answer

A)  Avery, MacLeod, and McCarty
B)  Griffith
C)  Chargaff
D)  Hershey and Chase
E)  Pauling

Question 16

​A purine base contains ____.

Accepted Answer

A)  ​one less phosphate group than a pyrimidine base
B)  ​two rings
C)  ​sulfur instead of nitrogen
D)  ​phosphate instead of nitrogen
E)  ​one ring

Question 17

When a cell has two complete sets of chromosomes, it is ____.

Accepted Answer

A)  haploid
B)  duplicated
C)  diploid
D)  triploid
E)  complete

Question 18

Match each definition to the correct term.​
-clone​

Accepted Answer

A)  ​composed of nitrogen-containing base, sugar, and phosphate group(s) 
B)  ​a genetic copy
C)  ​chromosome that does not determine sex
D)  ​DNA wrapped around histones
E)  ​fills in gaps between nucleotides; seals breaks in a DNA strandF) ​having two of each type of chromosomeG) ​adds nucleotides to a growing DNA strand

Question 19

Nucleic acids contain ____.

Accepted Answer

A)  sulfur
B)  nitrogen
C)  potassium
D)  iron
E)  manganese

Question 20

When DNA replication begins, ____.

Accepted Answer

A)  the two DNA strands unwind from each other
B)  the two DNA strands condense
C)  two DNA molecules bond
D)  old DNA strands move to pair with new strands
E)  the sugar-phosphate backbone is degraded

Exam 8: DNA Structure and Function

The building blocks of nucleic acids are ____.

Correct Answer
verified

Which statement correctly describes mutations and their repairs?

Correct Answer
verified

When DNA replication begins, ____.

Correct Answer
verified

Proofreading by DNA polymerase must occur before the end of ____ to prevent mistakes from becoming mutations.

Correct Answer
verified

Bacteriophages are ____.

Correct Answer
verified

Match each definition to the correct term. -nucleosome

Correct Answer
verified

During DNA replication, DNA polymerase catalyzes the formation of a bond between the group on the 3′ carbon at the end of a DNA strand and the group on a nucleotide's 5′ carbon.

Correct Answer
verified

Which scientist(s) identified the transforming substance involved in changing R bacteria to S bacteria?

Correct Answer
verified

When a cell has two complete sets of chromosomes, it is ____.

Correct Answer
verified

Correct Answer
verified

Nucleic acids contain ____.

Correct Answer
verified

A human karyotype showing 22 pairs of autosomes plus two X chromosomes indicates a(n) ____.

Correct Answer
verified

A purine base contains ____.

Correct Answer
verified

Which example of complementary base pairing is correct?

Correct Answer
verified

Describe the difference between a replication error and a mutation.

Correct Answer
verified
A replication error occurs during the pr...
View Answer

In a DNA molecule, cytosine binds to by hydrogen bonds.

Correct Answer
verified

UV light can cause the formation of ____.

Correct Answer
verified

Mutations ____.

Correct Answer
verified

Match the nucleotide to its correct description. -This nucleotide is a double-ringed molecule.

Correct Answer
verified

Match each definition to the correct term. -clone

Correct Answer
verified

Exam 8: DNA Structure and Function

The building blocks of nucleic acids are ____.

Correct AnswerverifiedShow Answer

Which statement correctly describes mutations and their repairs?​

Correct AnswerverifiedShow Answer

When DNA replication begins, ____.

Correct AnswerverifiedShow Answer

Proofreading by DNA polymerase must occur before the end of ____ to prevent mistakes from becoming mutations.

Correct AnswerverifiedShow Answer

Bacteriophages are ____.

Correct AnswerverifiedShow Answer

Match each definition to the correct term.​ -​nucleosome

Correct AnswerverifiedShow Answer

​During DNA replication, DNA polymerase catalyzes the formation of a bond between the ____ group on the 3′ carbon at the end of a DNA strand and the ____ group on a nucleotide's 5′ carbon.

Correct AnswerverifiedShow Answer

Which scientist(s) identified the transforming substance involved in changing R bacteria to S bacteria?

Correct AnswerverifiedShow Answer

When a cell has two complete sets of chromosomes, it is ____.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Nucleic acids contain ____.

Correct AnswerverifiedShow Answer

A human karyotype showing 22 pairs of autosomes plus two X chromosomes indicates a(n) ____.

Correct AnswerverifiedShow Answer

​A purine base contains ____.

Correct AnswerverifiedShow Answer

Which example of complementary base pairing is correct?​

Correct AnswerverifiedShow Answer

Describe the difference between a replication error and a mutation.

Correct AnswerverifiedA replication error occurs during the pr...View AnswerShow Answer

​In a DNA molecule, cytosine binds to ____ by ____ hydrogen bonds.

Correct AnswerverifiedShow Answer

UV light can cause the formation of ____.

Correct AnswerverifiedShow Answer

Mutations ____.​

Correct AnswerverifiedShow Answer

Match the nucleotide to its correct description. -This nucleotide is a double-ringed molecule.

Correct AnswerverifiedShow Answer

Match each definition to the correct term.​ -clone​

Correct AnswerverifiedShow Answer

Correct Answer
verified

Which statement correctly describes mutations and their repairs?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Match each definition to the correct term. -nucleosome

Correct Answer
verified

During DNA replication, DNA polymerase catalyzes the formation of a bond between the group on the 3′ carbon at the end of a DNA strand and the group on a nucleotide's 5′ carbon.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A purine base contains ____.

Correct Answer
verified

Which example of complementary base pairing is correct?

Correct Answer
verified

Correct Answer
verified
A replication error occurs during the pr...
View Answer

In a DNA molecule, cytosine binds to by hydrogen bonds.

Correct Answer
verified

Correct Answer
verified

Mutations ____.

Correct Answer
verified

Correct Answer
verified

Match each definition to the correct term. -clone

Correct Answer
verified