Question 1

Identify each labelled part of this illustration of eukaryotic DNA.  
-enhancer

Accepted Answer

The answer of Identify each labelled part of this illustration...

Question 2

A direct correlation exists between the level of translation and the length of a poly(A) tail.

Accepted Answer

A) True 
 B)False

Question 3

Match each term with its definition.
-siRNA

Accepted Answer

A) regulatory protein that activates the expression of an operon's genes 
B) interfering RNA molecules originally encoded by nuclear DNA 
C) process of controlling the expression of genes that takes place at the DNA level 
D) regulatory protein that prevents an operon's genes from being expressed 
E) inhibition of transcription via DNA methylation
F)interfering RNA molecules associated with some viral life cycles
G)tumour comprising cells that invade and disrupt the surrounding tissues
H)increases expression of an operon's genes
I)cluster of prokaryotic genes and their associated DNA regulatory sequences
J)tumour comprising undifferentiated cells that stay together in a single mass
K)spread of malignant cells through the blood or lymphatic system
L)removes a nucleosome from DNA to expose a promoter 
A) regulatory protein that activates the expression of an operon's genes 
B) interfering RNA molecules originally encoded by nuclear DNA 
C) process of controlling the expression of genes that takes place at the DNA level 
D) regulatory protein that prevents an operon's genes from being expressed 
E) inhibition of transcription via DNA methylation
F)interfering RNA molecules associated with some viral life cycles
G)tumour comprising cells that invade and disrupt the surrounding tissues
H)increases expression of an operon's genes
I)cluster of prokaryotic genes and their associated DNA regulatory sequences
J)tumour comprising undifferentiated cells that stay together in a single mass
K)spread of malignant cells through the blood or lymphatic system
L)removes a nucleosome from DNA to expose a promoter

Question 4

Identify each labelled part on the illustration of the Lac operon. 
 
-lacY

Accepted Answer

The answer of Identify each labelled part on the illustration...

Question 5

When comparing gene regulation in prokaryotes to that in eukaryotes, which is better? Justify your answer.

Accepted Answer

Neither is superior to the other; instea

Question 6

What is the essential molecular difference that distinguishes cell types?

Accepted Answer

A) presence or absence of tissues 
B) presence or absence of genes 
C) presence or absence of specific introns 
D) presence or absence of products resulting from expression of genes 
A) presence or absence of tissues 
B) presence or absence of genes 
C) presence or absence of specific introns 
D) presence or absence of products resulting from expression of genes

Question 7

Which of the following is a key regulatory event for regulating transcription initiation?

Accepted Answer

A) controlling the transition between the inactive and active states of chromatin in the region of H2B histone 
B) controlling the transition between the inactive and active states of chromatin in the region of a promoter 
C) controlling the transition between the inactive and active states of chromatin in the region of introns 
D) controlling the transition between the inactive and active states of chromatin in the region of exons 
A) controlling the transition between the inactive and active states of chromatin in the region of H2B histone 
B) controlling the transition between the inactive and active states of chromatin in the region of a promoter 
C) controlling the transition between the inactive and active states of chromatin in the region of introns 
D) controlling the transition between the inactive and active states of chromatin in the region of exons

Question 8

A benign tumour is usually NOT life-threatening.

Accepted Answer

A) True 
 B)False

Question 9

Identify each labelled part on the illustration of the Lac operon. 
 
-regulatory gene

Accepted Answer

The answer of Identify each labelled part on the illustration...

Question 10

Identify each labelled part on the illustration of the Lac operon. 
 
-transcription initiation site

Accepted Answer

The answer of Identify each labelled part on the illustration...

Question 11

Many eukaryotic operons are subject to numerous regulatory mechanisms.

Accepted Answer

A) True 
 B)False

Question 12

Identify each labelled part on the illustration of the Lac operon. 
 
-lac operon

Accepted Answer

The answer of Identify each labelled part on the illustration...

Question 13

Which of the following determines the types of mRNA that are available to ribosomes?

Accepted Answer

A) translational regulation 
B) posttranslational regulation 
C) transcriptional regulation 
D) posttranscriptional regulation 
A) translational regulation 
B) posttranslational regulation 
C) transcriptional regulation 
D) posttranscriptional regulation

Question 14

Match each term with its definition.
-silencing

Accepted Answer

A) regulatory protein that activates the expression of an operon's genes 
B) interfering RNA molecules originally encoded by nuclear DNA 
C) process of controlling the expression of genes that takes place at the DNA level 
D) regulatory protein that prevents an operon's genes from being expressed 
E) inhibition of transcription via DNA methylation
F)interfering RNA molecules associated with some viral life cycles
G)tumour comprising cells that invade and disrupt the surrounding tissues
H)increases expression of an operon's genes
I)cluster of prokaryotic genes and their associated DNA regulatory sequences
J)tumour comprising undifferentiated cells that stay together in a single mass
K)spread of malignant cells through the blood or lymphatic system
L)removes a nucleosome from DNA to expose a promoter 
A) regulatory protein that activates the expression of an operon's genes 
B) interfering RNA molecules originally encoded by nuclear DNA 
C) process of controlling the expression of genes that takes place at the DNA level 
D) regulatory protein that prevents an operon's genes from being expressed 
E) inhibition of transcription via DNA methylation
F)interfering RNA molecules associated with some viral life cycles
G)tumour comprising cells that invade and disrupt the surrounding tissues
H)increases expression of an operon's genes
I)cluster of prokaryotic genes and their associated DNA regulatory sequences
J)tumour comprising undifferentiated cells that stay together in a single mass
K)spread of malignant cells through the blood or lymphatic system
L)removes a nucleosome from DNA to expose a promoter

Question 15

Identify each labelled part of this illustration of eukaryotic DNA.  
-transcription initiation site

Accepted Answer

The answer of Identify each labelled part of this illustration...

Question 16

Which of the following is the function of a coactivator?

Accepted Answer

A) It unwinds the promoter DNA, allowing transcription to begin. 
B) It recognizes and binds to the TATA box of a protein-coding gene's promoter. 
C) It binds to the promoter proximal elements to stimulate transcription initiation. 
D) It forms a bridge between the activators at the enhancer and the proteins at the promoter. 
A) It unwinds the promoter DNA, allowing transcription to begin. 
B) It recognizes and binds to the TATA box of a protein-coding gene's promoter. 
C) It binds to the promoter proximal elements to stimulate transcription initiation. 
D) It forms a bridge between the activators at the enhancer and the proteins at the promoter.

Question 17

Match each term with its definition.
-activator

Accepted Answer

A) regulatory protein that activates the expression of an operon's genes 
B) interfering RNA molecules originally encoded by nuclear DNA 
C) process of controlling the expression of genes that takes place at the DNA level 
D) regulatory protein that prevents an operon's genes from being expressed 
E) inhibition of transcription via DNA methylation
F)interfering RNA molecules associated with some viral life cycles
G)tumour comprising cells that invade and disrupt the surrounding tissues
H)increases expression of an operon's genes
I)cluster of prokaryotic genes and their associated DNA regulatory sequences
J)tumour comprising undifferentiated cells that stay together in a single mass
K)spread of malignant cells through the blood or lymphatic system
L)removes a nucleosome from DNA to expose a promoter 
A) regulatory protein that activates the expression of an operon's genes 
B) interfering RNA molecules originally encoded by nuclear DNA 
C) process of controlling the expression of genes that takes place at the DNA level 
D) regulatory protein that prevents an operon's genes from being expressed 
E) inhibition of transcription via DNA methylation
F)interfering RNA molecules associated with some viral life cycles
G)tumour comprising cells that invade and disrupt the surrounding tissues
H)increases expression of an operon's genes
I)cluster of prokaryotic genes and their associated DNA regulatory sequences
J)tumour comprising undifferentiated cells that stay together in a single mass
K)spread of malignant cells through the blood or lymphatic system
L)removes a nucleosome from DNA to expose a promoter

Question 18

Which of the following determines which genes are transcribed?

Accepted Answer

A) posttranscriptional regulation 
B) transcriptional regulation 
C) translational regulation 
D) posttranslational regulation 
A) posttranscriptional regulation 
B) transcriptional regulation 
C) translational regulation 
D) posttranslational regulation

Question 19

Identify each labelled part on the illustration of the Lac operon. 
 
-transcription termination site

Accepted Answer

The answer of Identify each labelled part on the illustration...

Question 20

What happens to a protein when it is tagged with ubiquitin?

Accepted Answer

A) The protein is sent to the nucleus. 
B) The ubiquitin enzyme degrades the protein. 
C) The protein is sent to the proteasome and is hydrolyzed to amino acids. 
D) The ubiquitin unfolds the protein. 
A) The protein is sent to the nucleus. 
B) The ubiquitin enzyme degrades the protein. 
C) The protein is sent to the proteasome and is hydrolyzed to amino acids. 
D) The ubiquitin unfolds the protein.

Exam 14: Control of Gene Expression

Identify each labelled part of this illustration of eukaryotic DNA. -enhancer

A direct correlation exists between the level of translation and the length of a poly(A) tail.

Match each term with its definition. -siRNA

Identify each labelled part on the illustration of the Lac operon. -lacY

When comparing gene regulation in prokaryotes to that in eukaryotes, which is better? Justify your answer.

What is the essential molecular difference that distinguishes cell types?

Which of the following is a key regulatory event for regulating transcription initiation?

A benign tumour is usually NOT life-threatening.

Identify each labelled part on the illustration of the Lac operon. -regulatory gene

Identify each labelled part on the illustration of the Lac operon. -transcription initiation site

Many eukaryotic operons are subject to numerous regulatory mechanisms.

Identify each labelled part on the illustration of the Lac operon. -lac operon

Which of the following determines the types of mRNA that are available to ribosomes?

Match each term with its definition. -silencing

Identify each labelled part of this illustration of eukaryotic DNA. -transcription initiation site

Which of the following is the function of a coactivator?

Match each term with its definition. -activator

Which of the following determines which genes are transcribed?

Identify each labelled part on the illustration of the Lac operon. -transcription termination site

What happens to a protein when it is tagged with ubiquitin?

Light and Life

The Cell: an Overview

Defining Life and Its Origins

Energy and Enzymes

Cell Membranes and Signalling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

Dna Structure, Replication, and Organization

Gene Structure and Expression

Dna Technologies

Genomes and Proteomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Species and Macroevolution

Understanding the History of Life on Earth

Humans and Evolution

Bacteria and Archaea

Viruses, Viroids, and Prions: Infectious Biological Particles

Protists

Fungi

Plants

Diversity of Animals 1: Sponges, Radiata, Platyhelminthes, and Protostomes

Diversity of Animals 2: Deuterostomes: Vertebrates and Their Closest Relatives

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Conservation of Biodiversity

Putting Selection to Work

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

Transport in Animals: the Circulatory System

Reproduction in Animals

Animal Development

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Control

Control of Animal Processes: Neural Integration

Muscles, Skeletons, and Body Movements

Animal Behaviour

Animal Nutrition

Gas Exchange: the Respiratory System

Regulating the Internal Environment

Defences Against Disease

Conservation and Evolutionary Physiology

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