Question 1

A particular triplet of bases in the coding sequence of DNA is AAA. The anticodon on the tRNA that binds the mRNA codon is ________.

Accepted Answer

A)  TTT 
B)  UUA 
C)  UUU 
D)  AAA 
A)  TTT 
B)  UUA 
C)  UUU 
D)  AAA

Question 2

Rank the following one-base point mutations with respect to their likelihood of affecting the structure of the corresponding polypeptide (from most likely to least likely).
1)insertion mutation deep within an intron
2)substitution mutation at the third position of a codon in an exon
3)substitution mutation at the second position of a codon in an exon
4)deletion mutation within the first exon of the gene

Accepted Answer

A)  1, 2, 3, 4 
B)  4, 3, 2, 1 
C)  2, 1, 4, 3 
D)  3, 1, 4, 2 
A)  1, 2, 3, 4 
B)  4, 3, 2, 1 
C)  2, 1, 4, 3 
D)  3, 1, 4, 2

Question 3

Which of the following processes occurs in prokaryotes but not in eukaryotes?

Accepted Answer

A)  post-transcriptional splicing 
B)  transcription and translation occur simultaneously 
C)  translation in the absence of a ribosome 
D)  gene splicing 
A)  post-transcriptional splicing 
B)  transcription and translation occur simultaneously 
C)  translation in the absence of a ribosome 
D)  gene splicing

Question 4

During the elongation phase of translation, which site in the ribosome represents the location where a codon is being read?

Accepted Answer

A)  E site 
B)  P site 
C)  A site 
D)  the large ribosomal subunit 
A)  E site 
B)  P site 
C)  A site 
D)  the large ribosomal subunit

Question 5

In eukaryotes, there are several different types of RNA polymerase. Which type is involved in transcription of mRNA for a globin protein?

Accepted Answer

A)  RNA polymerase I 
B)  RNA polymerase II 
C)  RNA polymerase III 
D)  primase 
A)  RNA polymerase I 
B)  RNA polymerase II 
C)  RNA polymerase III 
D)  primase

Question 6

A particular triplet of bases in the template strand of DNA is 5′-AGT-3′. What would be the corresponding codon for the mRNA that is transcribed?

Accepted Answer

A)  3′-UCA-5′ 
B)  3′-UGA-5′ 
C)  5′-TCA-3′ 
D)  3′-ACU-5′ 
A)  3′-UCA-5′ 
B)  3′-UGA-5′ 
C)  5′-TCA-3′ 
D)  3′-ACU-5′

Question 7

What is the function of the release factor during translation in eukaryotes?

Accepted Answer

A)  It binds to the stop codon in the A site in place of a tRNA. 
B)  It releases the amino acid from its tRNA to allow the amino acid to form a peptide bond. 
C)  It supplies a source of energy for termination of translation. 
D)  It releases the ribosome from the ER to allow polypeptides into the cytosol. 
A)  It binds to the stop codon in the A site in place of a tRNA. 
B)  It releases the amino acid from its tRNA to allow the amino acid to form a peptide bond. 
C)  It supplies a source of energy for termination of translation. 
D)  It releases the ribosome from the ER to allow polypeptides into the cytosol.

Exam 17: Gene Expression: From Gene to Protein

A particular triplet of bases in the coding sequence of DNA is AAA. The anticodon on the tRNA that binds the mRNA codon is ________.

Which of the following processes occurs in prokaryotes but not in eukaryotes?

During the elongation phase of translation, which site in the ribosome represents the location where a codon is being read?

In eukaryotes, there are several different types of RNA polymerase. Which type is involved in transcription of mRNA for a globin protein?

A particular triplet of bases in the template strand of DNA is 5′-AGT-3′. What would be the corresponding codon for the mRNA that is transcribed?

What is the function of the release factor during translation in eukaryotes?

Evolution, the Themes of Biology, and Scientific Inquiry

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Vascular Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

Filters