Question 1

What is implied by the concept that the genetic code is universal?

Accepted Answer

A)  It is a recent evolutionary development. 
B)  It is different in every type of organism. 
C)  It frequently changes. 
D)  It was established early in evolution. 
A)  It is a recent evolutionary development. 
B)  It is different in every type of organism. 
C)  It frequently changes. 
D)  It was established early in evolution.

Question 2

For each item or event, indicate the process it is associated with.
-signal recognition particle

Accepted Answer

A) processing of pre-mRNA 
B) translation 
C) sorting proteins in cells 
D) transcription 
A) processing of pre-mRNA 
B) translation 
C) sorting proteins in cells 
D) transcription

Question 3

Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell has a signal peptide. Where would this polypeptide be located within the cell as it is maturing?

Accepted Answer

A)  first in the rough ER, and then in the Golgi apparatus 
B)  first in the cytoplasm, and then in the rough ER 
C)  in the cytoplasm only 
D)  in the Golgi apparatus only 
A)  first in the rough ER, and then in the Golgi apparatus 
B)  first in the cytoplasm, and then in the rough ER 
C)  in the cytoplasm only 
D)  in the Golgi apparatus only

Question 4

Which process involves small ribonucleoprotein particles (snRNPs)?

Accepted Answer

A)  initiation of translation 
B)  mRNA splicing 
C)  initiation of transcription 
D)  aminoacylation of tRNA 
A)  initiation of translation 
B)  mRNA splicing 
C)  initiation of transcription 
D)  aminoacylation of tRNA

Question 5

Suppose that during transcription of a eukaryotic gene, the RNA polymerase does NOT encounter a polyadenylation signal. What aspect of the transcription of this gene would be affected?

Accepted Answer

A)  The pre-mRNA would be truncated. 
B)  The pre-mRNA would be elongated. 
C)  There would be no effect; the gene is transcribed normally. 
D)  The pre-mRNA would be exported prematurely. 
A)  The pre-mRNA would be truncated. 
B)  The pre-mRNA would be elongated. 
C)  There would be no effect; the gene is transcribed normally. 
D)  The pre-mRNA would be exported prematurely.

Question 6

How is the process of adding the correct amino acid onto a tRNA molecule catalyzed?

Accepted Answer

A)  by RNA polymerase 
B)  by the tRNA itself 
C)  by an aminoacyl-tRNA synthetase 
D)  by an mRNA 
A)  by RNA polymerase 
B)  by the tRNA itself 
C)  by an aminoacyl-tRNA synthetase 
D)  by an mRNA

Exam 12: Gene Structure Expression, and Mutation

What is implied by the concept that the genetic code is universal?

For each item or event, indicate the process it is associated with. -signal recognition particle

Suppose that the first part of a new polypeptide chain being produced in a eukaryotic cell has a signal peptide. Where would this polypeptide be located within the cell as it is maturing?

Which process involves small ribonucleoprotein particles (snRNPs)?

Suppose that during transcription of a eukaryotic gene, the RNA polymerase does NOT encounter a polyadenylation signal. What aspect of the transcription of this gene would be affected?

How is the process of adding the correct amino acid onto a tRNA molecule catalyzed?

Light and Life

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signaling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

The Chromosomal Basis of Mendelian Inheritance

Genetic Linkage, Sex-Linkage, and Other Non-Mendelian Inheritance Mechanisms

DNA Structure, Replication, and Repair

Regulation of Gene Expression

Dna Technologies

Genomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Speciation and Macroevolution

Systematics and Phylogenetics: Revealing the Tree of Life

Humans and Evolution

Defining Life and Its Origins

Viruses, Viroids, and Prions: Infectious Biological Particles

Bacteria and Archaea

Protists

Fungi

Plants

Animals

Conservation of Biodiversity

Population Ecology

Species Interactions and Community Ecology

Ecosystems

Animal Behaviour

Organization of the Plant Body

Transport in Plants

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Animal Nutrition

Gas Exchange: the Respiratory System

Internal Transport: the Circulatory System

Regulation of the Internal Environment: Water, Solutes, and Temperature

Control of Animal Processes: Endocrine Control

Animal Reproduction

Control of Animal Processes: Neural Control

Muscles, Skeletons, and Body Movements

Filters