Question 1

The products of genes that are switched on in specific tissues at specific stages of development affect mainly

Accepted Answer

A) gene replication. 
B) gene transcription. 
C) mRNA transcript processing. 
D) translation. 
E) post-translational processing of proteins. 
A) gene replication. 
B) gene transcription. 
C) mRNA transcript processing. 
D) translation. 
E) post-translational processing of proteins. B

Question 2

In the ABC model of flower development in Arabidopsis thaliana, stamens form when gene(s) __________ is(are) switched on

Accepted Answer

A) A 
B) A and B 
C) B and C 
D) C 
E) A and B and C 
A) A 
B) A and B 
C) B and C 
D) C 
E) A and B and C C

Question 3

In the ABC model of flower development in Arabidopsis thaliana, petals form when gene(s) __________ is(are) switched on.

Accepted Answer

A) A 
B) A and B 
C) B and C 
D) C 
E) A and B and C 
A) A 
B) A and B 
C) B and C 
D) C 
E) A and B and C B

Question 4

Mutation of the A group gene in Arabidopsis thaliana affects development in its flower's

Accepted Answer

A) first whorl only. 
B) second whorl only. 
C) third whorl only. 
D) first and second whorls. 
E) second and third whorls. 
A) first whorl only. 
B) second whorl only. 
C) third whorl only. 
D) first and second whorls. 
E) second and third whorls.

Question 5

Which letter in the above figure represents breast cancer?

Accepted Answer

A) A rounded cells 
B) B irregular shaped cells 
C) both A and B 
D) neither A or B 
E) this is prostate tissue 
A) A rounded cells 
B) B irregular shaped cells 
C) both A and B 
D) neither A or B 
E) this is prostate tissue

Question 6

When, how, and to what extent any gene control mechanism comes into play depends on

Accepted Answer

A) the type of cell. 
B) the cell's function. 
C) the cell's chemical environment. 
D) signals from the cells external environment. 
E) all of these. 
A) the type of cell. 
B) the cell's function. 
C) the cell's chemical environment. 
D) signals from the cells external environment. 
E) all of these.

Question 7

In prokaryotes, most of the control of gene expression is at the __________ level.

Accepted Answer

A) transcriptional 
B) transcript processing 
C) transport 
D) translational 
E) post-translational 
A) transcriptional 
B) transcript processing 
C) transport 
D) translational 
E) post-translational

Question 8

Which of the following statements is (are) true concerning promoters?

Accepted Answer

A) They are short sequences in DNA. 
B) They are locations in DNA where regulatory proteins gather. 
C) They control transcription. 
D) They are associated with specific genes. 
E) All of these are true. 
A) They are short sequences in DNA. 
B) They are locations in DNA where regulatory proteins gather. 
C) They control transcription. 
D) They are associated with specific genes. 
E) All of these are true.

Question 9

The obvious advantage of the lactose operon is that

Accepted Answer

A) it allows bacteria to survive in the presence of lactose. 
B) lactose-metabolizing enzymes need not be made when lactose is not present. 
C) it enables bacteria to make lactose only in the presence of the proper enzymes. 
D) it negates the need for milk in the diet of adult humans. 
E) it enables glucose to substitute for lactose in the diet of lactose intolerant persons. 
A) it allows bacteria to survive in the presence of lactose. 
B) lactose-metabolizing enzymes need not be made when lactose is not present. 
C) it enables bacteria to make lactose only in the presence of the proper enzymes. 
D) it negates the need for milk in the diet of adult humans. 
E) it enables glucose to substitute for lactose in the diet of lactose intolerant persons.

Question 10

BRCA1 and BRCA2

Accepted Answer

A) are called cancer genes. 
B) code for tumor suppressing proteins. 
C) are involved in DNA repair mechanisms. 
D) in their mutated forms often occur in cancerous breast cells. 
E) are all of these. 
A) are called cancer genes. 
B) code for tumor suppressing proteins. 
C) are involved in DNA repair mechanisms. 
D) in their mutated forms often occur in cancerous breast cells. 
E) are all of these.

Question 11

Which of the following causes DNA to wrap tightly around histones essentially preventing transcription?

Accepted Answer

A) methylation 
B) acetyl CoA 
C) nitrogenation 
D) dehydration 
E) carbonation 
A) methylation 
B) acetyl CoA 
C) nitrogenation 
D) dehydration 
E) carbonation

Question 12

Mutation of the B group gene in Arabidopsis thaliana affects development in its flower's

Accepted Answer

A) first whorl only. 
B) second whorl only. 
C) third whorl only. 
D) first and second whorls. 
E) second and third whorls. 
A) first whorl only. 
B) second whorl only. 
C) third whorl only. 
D) first and second whorls. 
E) second and third whorls.

Question 13

The prokaryote operon model explains gene regulation at the level of

Accepted Answer

A) replication. 
B) transcription. 
C) transcript processing. 
D) transcript transport. 
E) translation. 
A) replication. 
B) transcription. 
C) transcript processing. 
D) transcript transport. 
E) translation.

Question 14

Which of the following statements is(are) true of homeotic genes?

Accepted Answer

A) More than one hundred of them have been identified. 
B) The same mechanisms control their transcription regardless of the species. 
C) Many of them are functionally interchangeable among species. 
D) They likely evolved in the most ancient eukaryotic cells. 
E) All of these are true. 
A) More than one hundred of them have been identified. 
B) The same mechanisms control their transcription regardless of the species. 
C) Many of them are functionally interchangeable among species. 
D) They likely evolved in the most ancient eukaryotic cells. 
E) All of these are true.

Question 15

Which of the following statements concerning cancer cells is most accurate?

Accepted Answer

A) Proto-oncogenes are part of the regulatory section of a chromosome. 
B) Tumor cells have lost their ability to stop dividing. 
C) Proto-oncogenes help control runaway cell division.   
D) Benign tumor cells usually spread only to adjacent organs. 
E) Metastasis is the spread of benign cells. 
A) Proto-oncogenes are part of the regulatory section of a chromosome. 
B) Tumor cells have lost their ability to stop dividing. 
C) Proto-oncogenes help control runaway cell division.   
D) Benign tumor cells usually spread only to adjacent organs. 
E) Metastasis is the spread of benign cells.

Question 16

The eyeless gene of Drosophila

Accepted Answer

A) has counterparts in humans. 
B) has counterparts in mice. 
C) has counterparts in squids. 
D) points to a shared ancestor among evolutionarily distant animals. 
E) is all of these. 
A) has counterparts in humans. 
B) has counterparts in mice. 
C) has counterparts in squids. 
D) points to a shared ancestor among evolutionarily distant animals. 
E) is all of these.

Question 17

A radical mastectomy involves the removal of

Accepted Answer

A) any breast tumor. 
B) a benign breast tumor. 
C) a malignant breast tumor. 
D) a breast, all lymph nodes under the arm, and skeletal muscles in the chest wall under the breast. 
E) both breasts. 
A) any breast tumor. 
B) a benign breast tumor. 
C) a malignant breast tumor. 
D) a breast, all lymph nodes under the arm, and skeletal muscles in the chest wall under the breast. 
E) both breasts.

Question 18

When cancer cells infiltrate muscle cells under the breast, the only treatment option is

Accepted Answer

A) radiation therapy. 
B) chemotherapy. 
C) a radical mastectomy. 
D) gene therapy. 
E) diet modification with massive vitamin intake. 
A) radiation therapy. 
B) chemotherapy. 
C) a radical mastectomy. 
D) gene therapy. 
E) diet modification with massive vitamin intake.

Question 19

Cell differentiation accounts for cells of an organism becoming different in

Accepted Answer

A) composition. 
B) structure. 
C) function. 
D) development. 
E) all of these. 
A) composition. 
B) structure. 
C) function. 
D) development. 
E) all of these.

Question 20

In knockout experiments,

Accepted Answer

A) genes are removed from chromosomes. 
B) normal genes are replaced physically by mutated genes. 
C) wild type genes are mutated to prevent their transcription or translation. 
D) mRNAs are prevented from attaching to ribosomes. 
E) the protein products of specific genes are inactivated. 
A) genes are removed from chromosomes. 
B) normal genes are replaced physically by mutated genes. 
C) wild type genes are mutated to prevent their transcription or translation. 
D) mRNAs are prevented from attaching to ribosomes. 
E) the protein products of specific genes are inactivated.

Exam 15: Controls Over Genes

The products of genes that are switched on in specific tissues at specific stages of development affect mainly

In the ABC model of flower development in Arabidopsis thaliana, stamens form when gene(s) __________ is(are) switched on

In the ABC model of flower development in Arabidopsis thaliana, petals form when gene(s) __________ is(are) switched on.

Mutation of the A group gene in Arabidopsis thaliana affects development in its flower's

Which letter in the above figure represents breast cancer?

When, how, and to what extent any gene control mechanism comes into play depends on

In prokaryotes, most of the control of gene expression is at the __________ level.

Which of the following statements is (are) true concerning promoters?

The obvious advantage of the lactose operon is that

BRCA1 and BRCA2

Which of the following causes DNA to wrap tightly around histones essentially preventing transcription?

Mutation of the B group gene in Arabidopsis thaliana affects development in its flower's

The prokaryote operon model explains gene regulation at the level of

Which of the following statements is(are) true of homeotic genes?

Which of the following statements concerning cancer cells is most accurate?

The eyeless gene of Drosophila

A radical mastectomy involves the removal of

When cancer cells infiltrate muscle cells under the breast, the only treatment option is

Cell differentiation accounts for cells of an organism becoming different in

In knockout experiments,

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

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