Question 1

Which genetic feature is least associated with females?

Accepted Answer

A) Barr body 
B) Y chromosome 
C) dosage compensation 
D) XIST gene 
E) X inactivation 
A) Barr body 
B) Y chromosome 
C) dosage compensation 
D) XIST gene 
E) X inactivation

Question 2

Which type of experiments deliberately inactivate a gene?

Accepted Answer

A) ablation 
B) control 
C) downregulation 
D) knockout 
E) tinman 
A) ablation 
B) control 
C) downregulation 
D) knockout 
E) tinman

Question 3

​Lactose intolerance occurs when ____.

Accepted Answer

A) ​the bacteria that break down lactose are not present in the large intestine 
B) ​individuals do not produce enough of the lactase enzyme 
C) ​individuals have a mutation allowing them to produce the lactase enzyme 
D) ​glucose and lactose are consumed together 
E) ​individuals digest lactose 
A) ​the bacteria that break down lactose are not present in the large intestine 
B) ​individuals do not produce enough of the lactase enzyme 
C) ​individuals have a mutation allowing them to produce the lactase enzyme 
D) ​glucose and lactose are consumed together 
E) ​individuals digest lactose

Question 4

What is the fate of the extra X chromosome in females?

Accepted Answer

A) Both X chromosomes are maintained normally. 
B) The extra X chromosome is degraded after each cell division. 
C) The extra X chromosome condenses. 
D) The extra X chromosome duplicates. 
E) The extra X chromosome is deleted after fertilization and is not present in the remainder of cells in the body. 
A) Both X chromosomes are maintained normally. 
B) The extra X chromosome is degraded after each cell division. 
C) The extra X chromosome condenses. 
D) The extra X chromosome duplicates. 
E) The extra X chromosome is deleted after fertilization and is not present in the remainder of cells in the body.

Question 5

What DNA site can increase the transcription rate of a gene that may be thousands of base pairs away?

Accepted Answer

A) transcription factor 
B) silencer 
C) enhancer 
D) activator 
E) transcription increaser 
A) transcription factor 
B) silencer 
C) enhancer 
D) activator 
E) transcription increaser

Question 6

Transcription factors control gene expression by ____.

Accepted Answer

A) initiating or repressing gene transcription only 
B) regulating the rate of gene transcription only 
C) promoting RNA degradation only 
D) initiating or repressing gene transcription and regulating the rate of gene transcription 
E) initiating or repressing gene transcription and promoting RNA degradation 
A) initiating or repressing gene transcription only 
B) regulating the rate of gene transcription only 
C) promoting RNA degradation only 
D) initiating or repressing gene transcription and regulating the rate of gene transcription 
E) initiating or repressing gene transcription and promoting RNA degradation

Question 7

Match the specific gene expression control activity with the control point at which it occurs. Some choices may be used more than once.
-RNA interference

Accepted Answer

A) post-translational modification 
B) translation 
C) RNA processing and transport 
D) transcription 
E) ​DNA-histone interactions 
A) post-translational modification 
B) translation 
C) RNA processing and transport 
D) transcription 
E) ​DNA-histone interactions

Question 8

Match the transcriptional gene expression control factor with the most appropriate description.
-These serve as DNA binding sites for repressors.

Accepted Answer

A) transcription factors 
B) enhancers 
C) repressors 
D) activators 
E) silencers 
A) transcription factors 
B) enhancers 
C) repressors 
D) activators 
E) silencers

Question 9

​The SRY gene is a ____ gene.

Accepted Answer

A) ​master 
B) ​mutated 
C) ​nonfunctional 
D) ​dosage compensation 
E) ​circadian rhythm 
A) ​master 
B) ​mutated 
C) ​nonfunctional 
D) ​dosage compensation 
E) ​circadian rhythm

Question 10

Match the specific gene expression control activity with the control point at which it occurs. Some choices may be used more than once.
-methyl groups are added to a histone, to tighten DNA

Accepted Answer

A) post-translational modification 
B) translation 
C) RNA processing and transport 
D) transcription 
E) ​DNA-histone interactions 
A) post-translational modification 
B) translation 
C) RNA processing and transport 
D) transcription 
E) ​DNA-histone interactions

Question 11

In the lac operon, a ____ derivative binds to the ____ and allows transcription of the operon's genes.​

Accepted Answer

A) ​glucose; operator 
B) ​glucose; repressor 
C) ​lactose; activator 
D) ​lactose; promoter 
E) ​lactose; repressor 
A) ​glucose; operator 
B) ​glucose; repressor 
C) ​lactose; activator 
D) ​lactose; promoter 
E) ​lactose; repressor

Question 12

​Adding ____ groups to histones loosens the DNA, so ____ can occur.

Accepted Answer

A) ​methyl; translation 
B) ​methyl; transcription 
C) ​acetyl; translation 
D) ​acetyl; transcription 
E) ​acetyl; ribosome-binding 
A) ​methyl; translation 
B) ​methyl; transcription 
C) ​acetyl; translation 
D) ​acetyl; transcription 
E) ​acetyl; ribosome-binding

Question 13

A new protein molecule may become activated or disabled by enzymes. This method of gene expression control works by ____.

Accepted Answer

A) preventing DNA replication 
B) loosening DNA from histones 
C) preventing RNA processing 
D) preventing translation 
E) preventing post-translational modification 
A) preventing DNA replication 
B) loosening DNA from histones 
C) preventing RNA processing 
D) preventing translation 
E) preventing post-translational modification

Question 14

​The ____ gene on the ____ chromosome determines male sex in mammals.

Accepted Answer

A) ​XIST; X 
B) ​XIST; Y 
C) ​SRY; X 
D) ​SRY; Y 
E) ​ABC; Y 
A) ​XIST; X 
B) ​XIST; Y 
C) ​SRY; X 
D) ​SRY; Y 
E) ​ABC; Y

Question 15

Match the specific gene expression control activity with the control point at which it occurs. Some choices may be used more than once.
-alternative RNA splicing

Accepted Answer

A) post-translational modification 
B) translation 
C) RNA processing and transport 
D) transcription 
E) ​DNA-histone interactions 
A) post-translational modification 
B) translation 
C) RNA processing and transport 
D) transcription 
E) ​DNA-histone interactions

Question 16

Match the transcriptional gene expression control factor with the most appropriate description.
-These serve as DNA binding sites for activators.

Accepted Answer

A) transcription factors 
B) enhancers 
C) repressors 
D) activators 
E) silencers 
A) transcription factors 
B) enhancers 
C) repressors 
D) activators 
E) silencers

Question 17

Match the correct description to the term below. Not all choices will be used.
-Group of genes together with a promoter and one or more operators that control their transcription.

Accepted Answer

A) operon 
B) operator 
C) promoter 
D) genes 
E) ​inducer 
A) operon 
B) operator 
C) promoter 
D) genes 
E) ​inducer

Question 18

​When glucose and lactose are present in an Escherichia coli cell, ____.

Accepted Answer

A) ​the lac operon will be turned off 
B) ​the lac operon will be on, and lactose will be used first 
C) ​the lac operon will be on, but glucose will be used first 
D) ​both glucose and lactose will be used at the same rates 
E) ​the cell will produce starch from the sugars 
A) ​the lac operon will be turned off 
B) ​the lac operon will be on, and lactose will be used first 
C) ​the lac operon will be on, but glucose will be used first 
D) ​both glucose and lactose will be used at the same rates 
E) ​the cell will produce starch from the sugars

Question 19

The repressor is bound to the lac operon unless ____ is present.

Accepted Answer

A) lactose 
B) lactase 
C) transcription factor 
D) RNA polymerase 
E) promoter 
A) lactose 
B) lactase 
C) transcription factor 
D) RNA polymerase 
E) promoter

Question 20

​Calico cats have their pattern due to ____.

Accepted Answer

A) ​random X chromosome inactivation 
B) ​random expression of the SRY gene 
C) ​overexpression of the SRY gene 
D) ​a mutation in the XIST gene 
E) ​overexpression of homeotic genes 
A) ​random X chromosome inactivation 
B) ​random expression of the SRY gene 
C) ​overexpression of the SRY gene 
D) ​a mutation in the XIST gene 
E) ​overexpression of homeotic genes

Exam 10: Control of Gene Expression

Which genetic feature is least associated with females?

Which type of experiments deliberately inactivate a gene?

​Lactose intolerance occurs when ____.

What is the fate of the extra X chromosome in females?

What DNA site can increase the transcription rate of a gene that may be thousands of base pairs away?

Transcription factors control gene expression by ____.

Match the specific gene expression control activity with the control point at which it occurs. Some choices may be used more than once. -RNA interference

Match the transcriptional gene expression control factor with the most appropriate description. -These serve as DNA binding sites for repressors.

​The SRY gene is a ____ gene.

Match the specific gene expression control activity with the control point at which it occurs. Some choices may be used more than once. -methyl groups are added to a histone, to tighten DNA

In the lac operon, a ____ derivative binds to the ____ and allows transcription of the operon's genes.​

​Adding ____ groups to histones loosens the DNA, so ____ can occur.

A new protein molecule may become activated or disabled by enzymes. This method of gene expression control works by ____.

​The ____ gene on the ____ chromosome determines male sex in mammals.

Match the specific gene expression control activity with the control point at which it occurs. Some choices may be used more than once. -alternative RNA splicing

Match the transcriptional gene expression control factor with the most appropriate description. -These serve as DNA binding sites for activators.

Match the correct description to the term below. Not all choices will be used. -Group of genes together with a promoter and one or more operators that control their transcription.

​When glucose and lactose are present in an Escherichia coli cell, ____.

The repressor is bound to the lac operon unless ____ is present.

​Calico cats have their pattern due to ____.

The Science of Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure

Ground Rules of Metabolism

Where It Starts-Photosynthesis

Releasing Chemical Energy

DNA Structure and Function

From DNA to Protein

How Cells Reproduce

Meiosis and Sexual Reproduction

Patterns in Inherited Traits

Human Inheritance

Biotechnology

Evidence of Evolution

Processes of Evolution

Lifes Origin and Early Evolution

Viruses, Bacteria, and Archaea

The Protists

Plant Evolution

Fungi

Animals I: Major Invertebrate Groups

Animals Ii: the Chordates

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Reproduction and Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Effects on the Biosphere

Filters

Lactose intolerance occurs when ____.

The SRY gene is a ____ gene.

In the lac operon, a derivative binds to the and allows transcription of the operon's genes.

Adding groups to histones loosens the DNA, so can occur.

The gene on the chromosome determines male sex in mammals.

When glucose and lactose are present in an Escherichia coli cell, ____.

Calico cats have their pattern due to ____.