Question 1

What site is occupied by the tRNAfMet during intitiation?

Accepted Answer

A) A site 
B) P site 
C) E site 
D) binds first to A site then moves to P site 
E) binds first to P site then moves to E site 
A) A site 
B) P site 
C) E site 
D) binds first to A site then moves to P site 
E) binds first to P site then moves to E site

Question 2

Prokaryotic proteins that are destined for secretion often contain a sequence of ________ amino acids at the ___ -terminus of the protein

Accepted Answer

A) hydrophilic;N 
B) hydrophobic;N 
C) hydrophilic;C 
D) hydrophobic;C 
E) none of the above 
A) hydrophilic;N 
B) hydrophobic;N 
C) hydrophilic;C 
D) hydrophobic;C 
E) none of the above

Question 3

What is the energy requirement for the formation of the 70S initiation complex?

Accepted Answer

A) 1 GTP 
B) 1 ATP 
C) 1 GTP and 1 ATP 
D) 2 GTP (from hydrolysis of 1 GTP to GMP) 
E) 2 ATP (from hydrolysis of 1 ATP to AMP) 
A) 1 GTP 
B) 1 ATP 
C) 1 GTP and 1 ATP 
D) 2 GTP (from hydrolysis of 1 GTP to GMP) 
E) 2 ATP (from hydrolysis of 1 ATP to AMP)

Question 4

If a mutation in the template strand of DNA occurred in the following manner,which of the possible amino acid changes would occur? 
5'-CAT-3' $\to$ 5'-TAT-3'

Accepted Answer

A) methionine  $\to$ isoleucine 
B) histidine  $\to$ tyrosine 
C) methionine  $\to$ tyrosine 
D) histidine  $\to$ isoleucine 
E) none of the above 
A) methionine  $\to$ isoleucine 
B) histidine  $\to$ tyrosine 
C) methionine  $\to$ tyrosine 
D) histidine  $\to$ isoleucine 
E) none of the above

Question 5

Which of the bases present on the ribosome participates in the peptidyltransferase reaction?

Accepted Answer

A) A 
B) C 
C) G 
D) T 
E) U 
A) A 
B) C 
C) G 
D) T 
E) U

Question 6

Which of the following explains how an aminoacyl-tRNA synthetase (AARS)recognizes the correct tRNA?

Accepted Answer

A) the AARS always recognizes the anticodon 
B) the AARS always recognizes elements of the acceptor stem 
C) the AARS always recognizes the size and sequence in the variable loop 
D) the AARS always recognizes elements in the D loop and T$\varPsi$ C loop 
E) the mechanism of AARS recognition varies from one enzyme to another 
A) the AARS always recognizes the anticodon 
B) the AARS always recognizes elements of the acceptor stem 
C) the AARS always recognizes the size and sequence in the variable loop 
D) the AARS always recognizes elements in the D loop and T$\varPsi$ C loop 
E) the mechanism of AARS recognition varies from one enzyme to another

Question 7

Which position of the anticodon is called the wobble base and with which base of the codon does it pair?

Accepted Answer

A) the 3' anticodon base which pairs with the first base of the codon 
B) the 3' anticodon base which pairs with the last base of the codon 
C) the middle anticodon base which pairs with the middle base of the codon 
D) the 5' anticodon base which pairs with the first base of the codon 
E) the 5' anticodon base which pairs with the last base of the codon 
A) the 3' anticodon base which pairs with the first base of the codon 
B) the 3' anticodon base which pairs with the last base of the codon 
C) the middle anticodon base which pairs with the middle base of the codon 
D) the 5' anticodon base which pairs with the first base of the codon 
E) the 5' anticodon base which pairs with the last base of the codon

What site is occupied by the tRNA^fMet during intitiation?

Prokaryotic proteins that are destined for secretion often contain a sequence of ______ amino acids at the _ -terminus of the protein

What is the energy requirement for the formation of the 70S initiation complex?

If a mutation in the template strand of DNA occurred in the following manner,which of the possible amino acid changes would occur? 5'-CAT-3' $\to$ 5'-TAT-3'

Which of the bases present on the ribosome participates in the peptidyltransferase reaction?

Which of the following explains how an aminoacyl-tRNA synthetase (AARS)recognizes the correct tRNA?

Which position of the anticodon is called the wobble base and with which base of the codon does it pair?

The Scope of Biochemistry

The Matrix of Life: Weak Interactions in an Aqueous Environment

The Energetics of Life

Nucleic Acids

Introduction to Proteins: the Primary Level of Protein Structure

The Three-Dimensional Structure of Proteins

Protein Function and Evolution

Contractile Proteins and Molecular Motors

Carbohydrates: Sugars,saccharides,glycans

Lipids,membranes and Cellular Transport

Enzymes: Biological Catalysts

Chemical Logic of Metabolism

Carbohydrate Metabolism: Glycolysis, gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Citric Acid Cycle and Glyoxylate Cycle

Electron Transport, oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism I: Fatty Acids,triacylglycerols,and Lipoproteins

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Lipid Metabolism Ii: Membrane Lipids, steroids, isoprenoids, and Eicosanoids

Metabolism of Nitrogenous Compounds I: Principles of Biosynthesis, utilization, and Turnover

Metabolism of Nitogenous Compounds Ii: Amino Acids, porphyrins, and Neurotransmitters

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes,genomes and Chromosomes

Dna Replication

Dna Restructuring: Repair,recombination,rearrangement,amplification

Information Readout: Transcription and Post-Transcriptional Processing

Regulation of Gene Expression

Filters

Exam 28: Information Decoding: Translation and Post-Translational Protein Processing

What site is occupied by the tRNAfMet during intitiation?

Prokaryotic proteins that are destined for secretion often contain a sequence of ________ amino acids at the ___ -terminus of the protein

What is the energy requirement for the formation of the 70S initiation complex?

If a mutation in the template strand of DNA occurred in the following manner,which of the possible amino acid changes would occur? 5'-CAT-3' →\to→ 5'-TAT-3'

Which of the bases present on the ribosome participates in the peptidyltransferase reaction?

Which of the following explains how an aminoacyl-tRNA synthetase (AARS)recognizes the correct tRNA?

Which position of the anticodon is called the wobble base and with which base of the codon does it pair?

The Scope of Biochemistry

The Matrix of Life: Weak Interactions in an Aqueous Environment

The Energetics of Life

Nucleic Acids

Introduction to Proteins: the Primary Level of Protein Structure

The Three-Dimensional Structure of Proteins

Protein Function and Evolution

Contractile Proteins and Molecular Motors

Carbohydrates: Sugars,saccharides,glycans

Lipids,membranes and Cellular Transport

Enzymes: Biological Catalysts

Chemical Logic of Metabolism

Carbohydrate Metabolism: Glycolysis, gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Citric Acid Cycle and Glyoxylate Cycle

Electron Transport, oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism I: Fatty Acids,triacylglycerols,and Lipoproteins

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Lipid Metabolism Ii: Membrane Lipids, steroids, isoprenoids, and Eicosanoids

Metabolism of Nitrogenous Compounds I: Principles of Biosynthesis, utilization, and Turnover

Metabolism of Nitogenous Compounds Ii: Amino Acids, porphyrins, and Neurotransmitters

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes,genomes and Chromosomes

Dna Replication

Dna Restructuring: Repair,recombination,rearrangement,amplification

Information Readout: Transcription and Post-Transcriptional Processing

Regulation of Gene Expression

Filters

What site is occupied by the tRNA^fMet during intitiation?

Prokaryotic proteins that are destined for secretion often contain a sequence of ______ amino acids at the _ -terminus of the protein

If a mutation in the template strand of DNA occurred in the following manner,which of the possible amino acid changes would occur? 5'-CAT-3' $\to$ 5'-TAT-3'