Question 1

What happened when researchers added BPDE,a component of tobacco smoke,to human lung cells in a laboratory experiment?

Accepted Answer

A)  The cells behaved normally. 
B)  The cells shrank in size. 
C)  The cells developed mutations in their p53 genes. 
D)  The cells required less energy to grow. 
A)  The cells behaved normally. 
B)  The cells shrank in size. 
C)  The cells developed mutations in their p53 genes. 
D)  The cells required less energy to grow.

Question 2

How is it that the cells in different body tissues are able to perform different functions?

Accepted Answer

A)  The cells exhibit different patterns of gene expression. 
B)  Different chromosomes have been inactivated in different cells. 
C)  The cells contain different genes. 
D)  The mutations that have accumulated in the cells of the different tissues control functions. 
A)  The cells exhibit different patterns of gene expression. 
B)  Different chromosomes have been inactivated in different cells. 
C)  The cells contain different genes. 
D)  The mutations that have accumulated in the cells of the different tissues control functions.

Question 3

Male tortoiseshell cats ________.

Accepted Answer

A)  do not have an X chromosome 
B)  have orange and black patches of fur that reflect the pattern of X chromosome inactivation 
C)  are usually XYY individuals 
D)  are likely to be exceedingly rare and very likely to be sterile since normal male cats are XY 
A)  do not have an X chromosome 
B)  have orange and black patches of fur that reflect the pattern of X chromosome inactivation 
C)  are usually XYY individuals 
D)  are likely to be exceedingly rare and very likely to be sterile since normal male cats are XY

Question 4

If you were working for a pharmaceutical company trying to develop anticancer drugs,what biological process would be the best target to investigate?

Accepted Answer

A)  meiosis 
B)  mitosis 
C)  cellular respiration 
D)  glycolysis 
A)  meiosis 
B)  mitosis 
C)  cellular respiration 
D)  glycolysis

Question 5

Many proto-oncogenes regulate ________.

Accepted Answer

A)  cell growth 
B)  cell cloning 
C)  cell division 
D)  cell repair 
A)  cell growth 
B)  cell cloning 
C)  cell division 
D)  cell repair

Question 6

Cells communicate with one another via ________.

Accepted Answer

A)  cascades of gene activation 
B)  the diffusion of RNA transcripts through adhesion junctions 
C)  signal transduction pathways 
D)  RNA splicing 
A)  cascades of gene activation 
B)  the diffusion of RNA transcripts through adhesion junctions 
C)  signal transduction pathways 
D)  RNA splicing

Question 7

Please read the paragraph below to answer the following questions.
You conducted a series of experiments to test whether the expression of hexokinase, an important enzyme involved in glycolysis, varies under different conditions. In the first experiment, you measured the production of hexokinase mRNA in cells at three different temperatures: 37°C, 25°C, and 10°C. Your results showed that the mRNA levels for hexokinase were 5× and 20× lower at 25°C and 10°C than at 37°C, respectively. Based on these results, you are going to conduct further experiments to attempt to answer your research question.
-What can you conclude from these results?

Accepted Answer

A)  Unpacking of the hexokinase gene occurs only at 37°C. 
B)  Transcription of the hexokinase gene occurs less frequently at lower temperatures. 
C)  The levels of hexokinase protein are not affected by temperature. 
D)  Translation of the hexokinase gene occurs more frequently at higher temperatures. 
A)  Unpacking of the hexokinase gene occurs only at 37°C. 
B)  Transcription of the hexokinase gene occurs less frequently at lower temperatures. 
C)  The levels of hexokinase protein are not affected by temperature. 
D)  Translation of the hexokinase gene occurs more frequently at higher temperatures.

Question 8

Data suggest that the normal version of BRCA1 functions as a(n)________.

Accepted Answer

A)  oncogene 
B)  tumor-suppressor gene 
C)  proto-oncogene 
D)  silencer 
A)  oncogene 
B)  tumor-suppressor gene 
C)  proto-oncogene 
D)  silencer

Question 9

Which of these is most likely to cause the development of a six-legged frog?

Accepted Answer

A)  mutation of homeotic genes 
B)  binding of repressors to operons 
C)  a mutation in DNA polymerase that affects all cells 
D)  conversion of a proto-oncogene to an oncogene 
A)  mutation of homeotic genes 
B)  binding of repressors to operons 
C)  a mutation in DNA polymerase that affects all cells 
D)  conversion of a proto-oncogene to an oncogene

What happened when researchers added BPDE,a component of tobacco smoke,to human lung cells in a laboratory experiment?

How is it that the cells in different body tissues are able to perform different functions?

Male tortoiseshell cats ________.

If you were working for a pharmaceutical company trying to develop anticancer drugs,what biological process would be the best target to investigate?

Many proto-oncogenes regulate ________.

Cells communicate with one another via ________.

Data suggest that the normal version of BRCA1 functions as a(n)________.

Which of these is most likely to cause the development of a six-legged frog?

Introduction: Biology Today

Essential Chemistry for Biology

The Molecules of Life

A Tour of the Cell

The Working Cell

Cellular Respiration: Obtaining Energy from Food

Photosynthesis: Using Light to Make Food

Cellular Reproduction: Cells from Cells

Patterns of Inheritance

The Structure and Function of DNA

DNA Technology

How Populations Evolve

How Biological Diversity Evolves

The Evolution of Microbial Life

The Evolution of Plants and Fungi

The Evolution of Animals

An Introduction to Ecology and the Biosphere

Population Ecology

Communities and Ecosystems

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Circulation and Respiration

The Body's Defenses

Hormones

Reproduction and Development

Nervous, Sensory, and Locomotor Systems

The Life of a Flowering Plant

The Working Plant

Filters

Exam 11: How Genes Are Controlled

What happened when researchers added BPDE,a component of tobacco smoke,to human lung cells in a laboratory experiment?

How is it that the cells in different body tissues are able to perform different functions?

Male tortoiseshell cats ________.

If you were working for a pharmaceutical company trying to develop anticancer drugs,what biological process would be the best target to investigate?

Many proto-oncogenes regulate ________.

Cells communicate with one another via ________.

Data suggest that the normal version of BRCA1 functions as a(n)________.

Which of these is most likely to cause the development of a six-legged frog?

Introduction: Biology Today

Essential Chemistry for Biology

The Molecules of Life

A Tour of the Cell

The Working Cell

Cellular Respiration: Obtaining Energy from Food

Photosynthesis: Using Light to Make Food

Cellular Reproduction: Cells from Cells

Patterns of Inheritance

The Structure and Function of DNA

DNA Technology

How Populations Evolve

How Biological Diversity Evolves

The Evolution of Microbial Life

The Evolution of Plants and Fungi

The Evolution of Animals

An Introduction to Ecology and the Biosphere

Population Ecology

Communities and Ecosystems

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Circulation and Respiration

The Body's Defenses

Hormones

Reproduction and Development

Nervous, Sensory, and Locomotor Systems

The Life of a Flowering Plant

The Working Plant

Filters