Question 1

rRNA is associated with what part of the cell?

Accepted Answer

A) cytoplasm 
B) mitochondrion 
C) nucleus 
D) ribosome 
E) cell membrane 
A) cytoplasm 
B) mitochondrion 
C) nucleus 
D) ribosome 
E) cell membrane

Question 2

How many three letter combinations are there present in the genetic code?

Accepted Answer

A) 32 
B) 64 
C) 16 
D) 88 
A) 32 
B) 64 
C) 16 
D) 88

Question 3

The enzyme involved in catalyzing the 5' phosphate reaction with the 3' hydroxyl group of the incoming base is called

Accepted Answer

A) DNA ligase. 
B) DNA polymerase. 
C) DNA gyrase. 
D) helicase. 
E) none of the above 
A) DNA ligase. 
B) DNA polymerase. 
C) DNA gyrase. 
D) helicase. 
E) none of the above

Question 4

The number of hydrogen bonds between adenine and thymine in DNA is

Accepted Answer

A) 0. 
B) 1. 
C) 2. 
D) 3. 
E) 4. 
A) 0. 
B) 1. 
C) 2. 
D) 3. 
E) 4.

Question 5

Match the following.
-nucleoside

Accepted Answer

A) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chain 
B) the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins 
C) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groups 
D) the sequence of nucleotides that specifies sequences of amino acids in protein synthesis 
E) a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
F)the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesis
G)one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNA
H)one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNA
I)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule
J)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
K)the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis 
A) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chain 
B) the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins 
C) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groups 
D) the sequence of nucleotides that specifies sequences of amino acids in protein synthesis 
E) a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
F)the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesis
G)one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNA
H)one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNA
I)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule
J)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
K)the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis

Question 6

The number of hydrogen bonds between cytosine and guanine in DNA is

Accepted Answer

A) 0. 
B) 1. 
C) 2. 
D) 3. 
E) 4. 
A) 0. 
B) 1. 
C) 2. 
D) 3. 
E) 4.

Question 7

Match the following.
-pyrimidine

Accepted Answer

A) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chain 
B) the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins 
C) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groups 
D) the sequence of nucleotides that specifies sequences of amino acids in protein synthesis 
E) a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
F)the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesis
G)one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNA
H)one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNA
I)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule
J)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
K)the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis 
A) a group of three nucleotides in RNA that code for specific amino acids or for termination of the protein chain 
B) the type of ribonucleic acid that is part of the ribosome and protein complex that synthesizes other proteins 
C) a specific chemical combination of ribose or deoxyribose,one of the five purine or pyrimidine bases found in nucleic acids,and one or more phosphate groups 
D) the sequence of nucleotides that specifies sequences of amino acids in protein synthesis 
E) a specific chemical combination of ribose or deoxyribose and one of the five purine or pyrimidine bases found in nucleic acids
F)the ribonucleic acid whose function is to deliver the amino acids into position for protein synthesis
G)one of three specific bases consisting of a heterocyclic ring with various substituted functional groups and found in DNA and RNA
H)one of two specific bases consisting of two interlocked heterocyclic rings and found in DNA and RNA
I)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule
J)a category of base found in nucleic acids consisting of a 6-membered heterocyclic molecule fused with a 5-membered heterocyclic molecule
K)the ribonucleic acid that carries the code transcribed from DNA and directs protein synthesis

Question 8

Codons provide the information needed to synthesize

Accepted Answer

A) nucleic acids. 
B) carbohydrates. 
C) lipids. 
D) proteins. 
A) nucleic acids. 
B) carbohydrates. 
C) lipids. 
D) proteins.

Question 9

What is the complementary strand for a single DNA strand with the sequence 5' TCGA 3'?

Accepted Answer

A) 3' TGCA 5' 
B) 3' AGCT 5' 
C) 3' CTAC 5' 
D) 3' GATC 5' 
E) 3' TCGA 5' 
A) 3' TGCA 5' 
B) 3' AGCT 5' 
C) 3' CTAC 5' 
D) 3' GATC 5' 
E) 3' TCGA 5'

Question 10

A nucleotide is a(an)

Accepted Answer

A) amide of a nitrogen base and a fatty acid. 
B) amide of a nucleoside and a fatty acid. 
C) ester of a nucleoside and a fatty acid. 
D) 5'-monophosphate ester of a nucleoside. 
E) polymer of alternating ribose and purine or pyrimidine units. 
A) amide of a nitrogen base and a fatty acid. 
B) amide of a nucleoside and a fatty acid. 
C) ester of a nucleoside and a fatty acid. 
D) 5'-monophosphate ester of a nucleoside. 
E) polymer of alternating ribose and purine or pyrimidine units.

Question 11

Transcription is

Accepted Answer

A) copying of DNA molecules to make an exact duplicate. 
B) production of a single strand of RNA identical to the information strand of DNA. 
C) production of a single strand of RNA from the template strand of DNA. 
D) making a protein molecule based on information contained in RNA. 
E) breakdown of damaged nucleic acids to prevent mutations. 
A) copying of DNA molecules to make an exact duplicate. 
B) production of a single strand of RNA identical to the information strand of DNA. 
C) production of a single strand of RNA from the template strand of DNA. 
D) making a protein molecule based on information contained in RNA. 
E) breakdown of damaged nucleic acids to prevent mutations.

Question 12

Which of the following is(are)a purine base found in nucleic acids?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) A and C 
A) 
  
B) 
  
C) 
  
D) 
  
E) A and C

Question 13

All of the statements about RNA are correct except

Accepted Answer

A) RNA can exist in three forms: rRNA,tRNA,and mRNA. 
B) RNA molecules are smaller than DNA molecules,but form double helices like DNA. 
C) RNA does not contain thymine. 
D) transfer RNA delivers amino acids to the protein chain as it is being manufactured. 
E) messenger RNA is complementary to the template strand of its DNA,and almost identical to the informational strand of the DNA. 
A) RNA can exist in three forms: rRNA,tRNA,and mRNA. 
B) RNA molecules are smaller than DNA molecules,but form double helices like DNA. 
C) RNA does not contain thymine. 
D) transfer RNA delivers amino acids to the protein chain as it is being manufactured. 
E) messenger RNA is complementary to the template strand of its DNA,and almost identical to the informational strand of the DNA.

Question 14

The number of hydrogen bonds between cytosine and thymine in DNA is

Accepted Answer

A) 0. 
B) 1. 
C) 2. 
D) 3. 
E) 4. 
A) 0. 
B) 1. 
C) 2. 
D) 3. 
E) 4.

Question 15

What is the name of the base at the 5' end of the sequence G-A-C-T-T-A?

Accepted Answer

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

Question 16

A region on the DNA strand that carries the information needed for the synthesis of a specific protein is called a

Accepted Answer

A) codon. 
B) gene. 
C) chromosome. 
D) complementary base unit. 
E) chromatid. 
A) codon. 
B) gene. 
C) chromosome. 
D) complementary base unit. 
E) chromatid.

Question 17

Chromatin is

Accepted Answer

A) nuclear material composed of DNA and histones. 
B) the portion of a chromosome that codes for a specific trait. 
C) a protein found on the surface of a cell. 
D) the fluid part of a cell that surrounds the organelles. 
E) a component of cell membranes. 
A) nuclear material composed of DNA and histones. 
B) the portion of a chromosome that codes for a specific trait. 
C) a protein found on the surface of a cell. 
D) the fluid part of a cell that surrounds the organelles. 
E) a component of cell membranes.

Question 18

The sugar found in an RNA nucleotide is

Accepted Answer

A) d-ribose. 
B) 2-deoxy-d-ribose. 
C) d-rhamnose. 
D) d-raffinose. 
E) all of the above 
A) d-ribose. 
B) 2-deoxy-d-ribose. 
C) d-rhamnose. 
D) d-raffinose. 
E) all of the above

Question 19

Which of the following is a major function of nucleic acids?

Accepted Answer

A) storage and transfer of genetic information 
B) storage and intracellular transfer of energy 
C) catalysis of virtually all biochemical reactions 
D) structural support in both plants and animals 
E) long-term storage of energy 
A) storage and transfer of genetic information 
B) storage and intracellular transfer of energy 
C) catalysis of virtually all biochemical reactions 
D) structural support in both plants and animals 
E) long-term storage of energy

Question 20

The most characteristic feature of all the bases found in either DNA or RNA is that they

Accepted Answer

A) are all nitrogen-containing 6 membered ring compounds. 
B) are all six membered rings. 
C) are all fused five and six membered rings. 
D) all bond to the sugar ring through the number 1 carbon of the base. 
E) all have at least one carbonyl group attached to the six-membered ring. 
A) are all nitrogen-containing 6 membered ring compounds. 
B) are all six membered rings. 
C) are all fused five and six membered rings. 
D) all bond to the sugar ring through the number 1 carbon of the base. 
E) all have at least one carbonyl group attached to the six-membered ring.

Exam 26: Nucleic Acids and Protein Synthesis

rRNA is associated with what part of the cell?

How many three letter combinations are there present in the genetic code?

The enzyme involved in catalyzing the 5' phosphate reaction with the 3' hydroxyl group of the incoming base is called

The number of hydrogen bonds between adenine and thymine in DNA is

Match the following. -nucleoside

The number of hydrogen bonds between cytosine and guanine in DNA is

Match the following. -pyrimidine

Codons provide the information needed to synthesize

What is the complementary strand for a single DNA strand with the sequence 5' TCGA 3'?

A nucleotide is a(an)

Transcription is

Which of the following is(are)a purine base found in nucleic acids?

All of the statements about RNA are correct except

The number of hydrogen bonds between cytosine and thymine in DNA is

What is the name of the base at the 5' end of the sequence G-A-C-T-T-A?

A region on the DNA strand that carries the information needed for the synthesis of a specific protein is called a

Chromatin is

The sugar found in an RNA nucleotide is

Which of the following is a major function of nucleic acids?

The most characteristic feature of all the bases found in either DNA or RNA is that they

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