Question 1

Which of the following is a false statement concerning amino groups?

Accepted Answer

A)  They are basic in pH. 
B)  They are found in amino acids. 
C)  They contain nitrogen. 
D)  They are nonpolar. 
E)  They are components of urea. 
A)  They are basic in pH. 
B)  They are found in amino acids. 
C)  They contain nitrogen. 
D)  They are nonpolar. 
E)  They are components of urea.

Question 2

-Which of the structures illustrated above contain(s)a carbonyl functional group?

Accepted Answer

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

Question 3

Which of the following statements correctly describes cis-trans isomers?

Accepted Answer

A)  They have variations in arrangement around a double bond. 
B)  They have an asymmetric carbon that makes them mirror images. 
C)  They have the same chemical properties. 
D)  They have different molecular formulas. 
E)  Their atoms and bonds are arranged in different sequences. 
A)  They have variations in arrangement around a double bond. 
B)  They have an asymmetric carbon that makes them mirror images. 
C)  They have the same chemical properties. 
D)  They have different molecular formulas. 
E)  Their atoms and bonds are arranged in different sequences.

Question 4

-Which molecule shown above has a carbonyl functional group in the form of a ketone?

Accepted Answer

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

Question 5

-Which of the structures illustrated above is an impossible covalently bonded molecule?

Accepted Answer

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

Question 6

Which action could produce a carbonyl group?

Accepted Answer

A)  the replacement of the -OH of a carboxyl group with hydrogen 
B)  the addition of a thiol to a hydroxyl 
C)  the addition of a hydroxyl to a phosphate 
D)  the replacement of the nitrogen of an amine with oxygen 
E)  the addition of a sulfhydryl to a carboxyl 
A)  the replacement of the -OH of a carboxyl group with hydrogen 
B)  the addition of a thiol to a hydroxyl 
C)  the addition of a hydroxyl to a phosphate 
D)  the replacement of the nitrogen of an amine with oxygen 
E)  the addition of a sulfhydryl to a carboxyl

Question 7

-The two molecules shown in the figure above are best described as

Accepted Answer

A)  optical isomers. 
B)  enantiomers. 
C)  structural isomers. 
D)  cis-trans isomers. 
E)  chain length isomers. 
A)  optical isomers. 
B)  enantiomers. 
C)  structural isomers. 
D)  cis-trans isomers. 
E)  chain length isomers.

Question 8

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

Accepted Answer

A)  hydroxyl 
B)  carbonyl 
C)  carboxyl 
D)  amino 
E)  phosphate 
A)  hydroxyl 
B)  carbonyl 
C)  carboxyl 
D)  amino 
E)  phosphate

Question 9

-Which molecule shown above can function as a base?

Accepted Answer

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

Question 10

-Which molecules shown above will form hydrogen bonds with water?

Accepted Answer

A)  Only D will form hydrogen bonds with water. 
B)  All of these molecules will form hydrogen bonds with water. 
C)  None of these molecules will form hydrogen bonds with water. 
D)  All of these molecules except B will form hydrogen bonds with water. 
E)  Only C, D, and E will form hydrogen bonds with water. 
A)  Only D will form hydrogen bonds with water. 
B)  All of these molecules will form hydrogen bonds with water. 
C)  None of these molecules will form hydrogen bonds with water. 
D)  All of these molecules except B will form hydrogen bonds with water. 
E)  Only C, D, and E will form hydrogen bonds with water.

Question 11

-Which of the groups above is a basic functional group that can accept H⁺ and become positively charged?

Accepted Answer

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

Exam 4: Carbon and the Molecular Diversity of Life

Which of the following is a false statement concerning amino groups?

-Which of the structures illustrated above contain(s)a carbonyl functional group?

Which of the following statements correctly describes cis-trans isomers?

-Which molecule shown above has a carbonyl functional group in the form of a ketone?

-Which of the structures illustrated above is an impossible covalently bonded molecule?

Which action could produce a carbonyl group?

-The two molecules shown in the figure above are best described as

Which chemical group is most likely to be responsible for an organic molecule behaving as a base?

-Which molecule shown above can function as a base?

-Which molecules shown above will form hydrogen bonds with water?

-Which of the groups above is a basic functional group that can accept H⁺ and become positively charged?

Introduction: Themes in the Study of Life

The Chemical Context of Life

Water and Life

The Structure and Function of Large Biological Molecules

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure, Growth, and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons, Synapses, and Signaling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behavior

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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