Question 1

Which of the following bases would be found in both DNA and RNA?

Accepted Answer

A) 
  
B) 
  
C) 
  
D)  More than one response is correct. 
A) 
  
B) 
  
C) 
  
D)  More than one response is correct.

Question 2

Codons provide the information needed to synthesize which of the following?

Accepted Answer

A)  mRNA 
B)  tRNA 
C)  DNA 
D)  proteins 
A)  mRNA 
B)  tRNA 
C)  DNA 
D)  proteins

Question 3

Restriction enzymes have been used as protective enzymes by bacteria.

Accepted Answer

A) True 
 B)False

Question 4

Each amino acid in a protein synthesis is specified by only one codon in the genetic code.

Accepted Answer

A) True 
 B)False

Question 5

What is the difference between deoxyribose and ribose?

Accepted Answer

A)  Deoxyribose is a d form,whereas ribose does not form either d or l forms. 
B)  Deoxyribose has one less oxygen atom than does ribose. 
C)  Ribose is found in the straight chain structure,whereas deoxyribose is not. 
D)  Ribose is a monosaccharide,but deoxyribose is a polysaccharide. 
A)  Deoxyribose is a d form,whereas ribose does not form either d or l forms. 
B)  Deoxyribose has one less oxygen atom than does ribose. 
C)  Ribose is found in the straight chain structure,whereas deoxyribose is not. 
D)  Ribose is a monosaccharide,but deoxyribose is a polysaccharide.

Question 6

Which of the following statements about DNA profiling is false?

Accepted Answer

A)  The percent of differences in DNA between people is great (99.9%). 
B)  Small DNA samples can be used through a process called PCR. 
C)  Everyone has different DNA,except identical twins. 
D)  DNA can be extracted from almost any biological sample. 
A)  The percent of differences in DNA between people is great (99.9%). 
B)  Small DNA samples can be used through a process called PCR. 
C)  Everyone has different DNA,except identical twins. 
D)  DNA can be extracted from almost any biological sample.

Question 7

Which of the following drugs should a mother avoid while pregnant?

Accepted Answer

A)  ethanol 
B)  opiates 
C)  testosterone 
D)  all the choices 
A)  ethanol 
B)  opiates 
C)  testosterone 
D)  all the choices

Question 8

Which of the following is not a pyrimidine base?

Accepted Answer

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

Question 9

The following base could be found in both DNA and RNA.

Accepted Answer

A) True 
 B)False

Question 10

The following segment of a nucleic acid could be identified as _____ .

Accepted Answer

A)  GCTQ 
B)  ATCG 
C)  TACG 
D)  GCAT 
A)  GCTQ 
B)  ATCG 
C)  TACG 
D)  GCAT

Question 11

Which of the following correctly describes the segment of the nucleic acid shown?

Accepted Answer

A)  This is a segment of DNA. 
B)  It has a 3' $\rarr$ 5' phosphodiester linkage. 
C)  The sugar involved is deoxyribose. 
D)  All of the responses are correct. 
A)  This is a segment of DNA. 
B)  It has a 3' $\rarr$ 5' phosphodiester linkage. 
C)  The sugar involved is deoxyribose. 
D)  All of the responses are correct.

Question 12

-phosphate-sugar-phosphate-sugar- is an example of a ____ backbone.

Accepted Answer

A)  human 
B)  chemical 
C)  nucleic acid 
D)  all the choices 
A)  human 
B)  chemical 
C)  nucleic acid 
D)  all the choices

Question 13

Ligases are usually used to cleave DNA molecules in genetic engineering.

Accepted Answer

A) True 
 B)False

Question 14

Only two restriction enzymes have been discovered.

Accepted Answer

A) True 
 B)False

Question 15

What are restriction enzymes?

Accepted Answer

A)  Carriers of foreign DNA into a cell that "restrict" the type of DNA introduced into the cell in the recombinant DNA technique. 
B)  Protective enzymes found in some bacteria that "restrict" the type of DNA allowed in the bacterial cell by catalyzing the cleaving of other types of DNA. 
C)  Circular,double-stranded DNA found in the cytoplasm of bacterial cells that "restrict" the amount of DNA in the bacteria. 
D)  DNA of an organism that contains genetic material that comes from another organism and "restricts" the enzymatic activity of the host. 
A)  Carriers of foreign DNA into a cell that "restrict" the type of DNA introduced into the cell in the recombinant DNA technique. 
B)  Protective enzymes found in some bacteria that "restrict" the type of DNA allowed in the bacterial cell by catalyzing the cleaving of other types of DNA. 
C)  Circular,double-stranded DNA found in the cytoplasm of bacterial cells that "restrict" the amount of DNA in the bacteria. 
D)  DNA of an organism that contains genetic material that comes from another organism and "restricts" the enzymatic activity of the host.

Question 16

Retroviruses infect host cells by injecting _____ .

Accepted Answer

A)  DNA 
B)  RNA 
C)  proteins 
D)  plasmids 
A)  DNA 
B)  RNA 
C)  proteins 
D)  plasmids

Question 17

A region of a DNA strand carrying the information needed for the synthesis of a specific protein is called a _____ .

Accepted Answer

A)  codon 
B)  gene 
C)  chromosome 
D)  complementary base pair 
A)  codon 
B)  gene 
C)  chromosome 
D)  complementary base pair

Question 18

The molecular basis of a mutation is most closely linked to a

Accepted Answer

A)  defect in the transcription of a genetic message to mRNA. 
B)  change in the sequence of bases on a DNA molecule. 
C)  defect in the rRNA of ribosomes. 
D)  misplaced stop codon. 
A)  defect in the transcription of a genetic message to mRNA. 
B)  change in the sequence of bases on a DNA molecule. 
C)  defect in the rRNA of ribosomes. 
D)  misplaced stop codon.

Question 19

Amino acids are moved from various positions in the cell to the ribosomes due to the information present in the tDNA molecule.

Accepted Answer

A) True 
 B)False

Question 20

What do restriction enzymes do?

Accepted Answer

A)  restrict enzyme activity 
B)  regulate the type of DNA allowed into a bacterial cell 
C)  catalyze the manufacture of DNA 
D)  limit enzyme growth 
A)  restrict enzyme activity 
B)  regulate the type of DNA allowed into a bacterial cell 
C)  catalyze the manufacture of DNA 
D)  limit enzyme growth

Exam 21: Nucleic Acids and Protein Synthesis

Which of the following bases would be found in both DNA and RNA?

Codons provide the information needed to synthesize which of the following?

Restriction enzymes have been used as protective enzymes by bacteria.

Each amino acid in a protein synthesis is specified by only one codon in the genetic code.

What is the difference between deoxyribose and ribose?

Which of the following statements about DNA profiling is false?

Which of the following drugs should a mother avoid while pregnant?

Which of the following is not a pyrimidine base?

The following base could be found in both DNA and RNA.

The following segment of a nucleic acid could be identified as _____ .

Which of the following correctly describes the segment of the nucleic acid shown?

-phosphate-sugar-phosphate-sugar- is an example of a ____ backbone.

Ligases are usually used to cleave DNA molecules in genetic engineering.

Only two restriction enzymes have been discovered.

What are restriction enzymes?

Retroviruses infect host cells by injecting _____ .

A region of a DNA strand carrying the information needed for the synthesis of a specific protein is called a _____ .

The molecular basis of a mutation is most closely linked to a

Amino acids are moved from various positions in the cell to the ribosomes due to the information present in the tDNA molecule.

What do restriction enzymes do?

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