Question 1

The greatest similarities among codons that specify the same amino acid occur _________.

Accepted Answer

A) in the first two nucleotides of the triplet 
B) in the last two nucleotides of the triplet 
C) in the first and third nucleotides of the triplet 
D) in the third nucleotide of the triplet 
E) in the middle nucleotide of the triplet 
A) in the first two nucleotides of the triplet 
B) in the last two nucleotides of the triplet 
C) in the first and third nucleotides of the triplet 
D) in the third nucleotide of the triplet 
E) in the middle nucleotide of the triplet

Question 2

What appears to be the role of siRNA in destroying the target mRNA upon which it and its associated proteins act?

Accepted Answer

A) It cleaves the target mRNA. 
B) It stabilizes the target mRNA. 
C) It destabilizes the target mRNA's binding to its associated proteins. 
D) It guides the RISC that cleaves the target mRNA to that target mRNA due to its complementarity to that molecule. 
E) It activates the RISC complex ribonuclease. 
A) It cleaves the target mRNA. 
B) It stabilizes the target mRNA. 
C) It destabilizes the target mRNA's binding to its associated proteins. 
D) It guides the RISC that cleaves the target mRNA to that target mRNA due to its complementarity to that molecule. 
E) It activates the RISC complex ribonuclease.

Question 3

Based on the interchangeability of the nucleotide at the third position,Francis Crick proposed that the same tRNA may be able to recognize more than one tRNA.What was his proposal called?

Accepted Answer

A) the tRNA theory 
B) the wobble hypothesis 
C) the steric hindrance hypothesis 
D) the chemiosmotic hypothesis 
E) the endosymbiotic hypothesis 
A) the tRNA theory 
B) the wobble hypothesis 
C) the steric hindrance hypothesis 
D) the chemiosmotic hypothesis 
E) the endosymbiotic hypothesis

Question 4

A tRNA has an anticodon with the sequence 3'-UAC-5'.What would be the sequence of the complementary codon? For the moment do not consider the wobble hypothesis.

Accepted Answer

A) 3'-UAC-5' 
B) 3'-AUG-5' 
C) 5'-AUG-3' 
D) 5'-AUC-3' 
E) 5'-ATG-3' 
A) 3'-UAC-5' 
B) 3'-AUG-5' 
C) 5'-AUG-3' 
D) 5'-AUC-3' 
E) 5'-ATG-3'

Question 5

A sense RNA for a particular targeted protein is ___________.

Accepted Answer

A) an RNA having a sequence complementary to the mRNA of the targeted protein 
B) an RNA having the sequence of the mRNA that encoded the protein being targeted 
C) a small RNA with a clover shape 
D) an RNA with catalytic activity 
E) an RNA generally found in ribosomes that forges the peptide bond 
A) an RNA having a sequence complementary to the mRNA of the targeted protein 
B) an RNA having the sequence of the mRNA that encoded the protein being targeted 
C) a small RNA with a clover shape 
D) an RNA with catalytic activity 
E) an RNA generally found in ribosomes that forges the peptide bond

Question 6

What is meant by referring to the genetic code as universal?

Accepted Answer

A) The genetic code is the same everywhere in the Universe. 
B) All of the organisms on Earth use the same genetic code with only minor variations. 
C) The genetic code is found in all organisms but varies extensively. 
D) The genetic code is minimal. 
E) The genetic code is multiphasic. 
A) The genetic code is the same everywhere in the Universe. 
B) All of the organisms on Earth use the same genetic code with only minor variations. 
C) The genetic code is found in all organisms but varies extensively. 
D) The genetic code is minimal. 
E) The genetic code is multiphasic.

Question 7

You are studying a particular tRNA.When charged with its amino acid,it is able to participate in protein synthesis.When interacting with the ribosome,it always enters the ribosome and associates with the P site.What amino acid is attached to the tRNA?

Accepted Answer

Methionine or more c

Question 8

You travel to another planet and discover that its genetic system is based on DNA,but it has 6 bases instead of 4 as happens on Earth.The proteins on the planet have 30 amino acids.What would be the likely number of letters in each codon on this planet?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 6 
A) 1 
B) 2 
C) 3 
D) 4 
E) 6

The greatest similarities among codons that specify the same amino acid occur _________.

What appears to be the role of siRNA in destroying the target mRNA upon which it and its associated proteins act?

Based on the interchangeability of the nucleotide at the third position,Francis Crick proposed that the same tRNA may be able to recognize more than one tRNA.What was his proposal called?

A tRNA has an anticodon with the sequence 3'-UAC-5'.What would be the sequence of the complementary codon? For the moment do not consider the wobble hypothesis.

A sense RNA for a particular targeted protein is ___________.

What is meant by referring to the genetic code as universal?

You are studying a particular tRNA.When charged with its amino acid,it is able to participate in protein synthesis.When interacting with the ribosome,it always enters the ribosome and associates with the P site.What amino acid is attached to the tRNA?

You travel to another planet and discover that its genetic system is based on DNA,but it has 6 bases instead of 4 as happens on Earth.The proteins on the planet have 30 amino acids.What would be the likely number of letters in each codon on this planet?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

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Exam 11: Gene Expression: From Transcription to Translation

The greatest similarities among codons that specify the same amino acid occur _________.

What appears to be the role of siRNA in destroying the target mRNA upon which it and its associated proteins act?

Based on the interchangeability of the nucleotide at the third position,Francis Crick proposed that the same tRNA may be able to recognize more than one tRNA.What was his proposal called?

A tRNA has an anticodon with the sequence 3'-UAC-5'.What would be the sequence of the complementary codon? For the moment do not consider the wobble hypothesis.

A sense RNA for a particular targeted protein is ___________.

What is meant by referring to the genetic code as universal?

You are studying a particular tRNA.When charged with its amino acid,it is able to participate in protein synthesis.When interacting with the ribosome,it always enters the ribosome and associates with the P site.What amino acid is attached to the tRNA?

You travel to another planet and discover that its genetic system is based on DNA,but it has 6 bases instead of 4 as happens on Earth.The proteins on the planet have 30 amino acids.What would be the likely number of letters in each codon on this planet?

Introduction to the Study of Cell and Molecular Biology

The Chemical Basis of Life

Bioenergetics, Enzymes, and Metabolism

The Structure and Function of the Plasma Membrane

Aerobic Respiration and the Mitochondrion

Photosynthesis and the Chloroplast

Interactions Between Cells and Their Environment

Cytoplasmic Membrane Systems: Structure, Function, and Membrane Trafficking

The Cytoskeleton and Cell Motility

The Nature of the Gene and the Genome

Control of Gene Expression

Dna Replication and Repair

Cellular Reproduction

Cell Signaling and Signal Transduction: Communication Between Cells

Cancer

The Immune Response

Techniques in Cell and Molecular Biology

Filters