Question 1

The monomer of ___________ is N-acetylglucoseamine.

Accepted Answer

A)  microfibrils 
B)  enzymes 
C)  storage polysaccharides 
D)  chitin 
E)  fats 
A)  microfibrils 
B)  enzymes 
C)  storage polysaccharides 
D)  chitin 
E)  fats

Question 2

The denaturation of a protein involves a disruption in its tertiary structure.

Accepted Answer

A) True 
 B)False

Question 3

When a polypeptide is hydrolyzed, many peptide bonds are formed.

Accepted Answer

A) True 
 B)False

Question 4

A common ______ structure of proteins involves a hydrogen bond between the amino group of one amino acid and the carboxyl group of an amino acid farther along the peptide chain.

Accepted Answer

A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  pentenary 
A)  primary 
B)  secondary 
C)  tertiary 
D)  quaternary 
E)  pentenary

Question 5

Pentoses and hexoses have a carbonyl group in the ring form but not the chain form.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following statements about enzymes is FALSE?

Accepted Answer

A)  They are globular proteins. 
B)  They enable cells to carry out chemical reactions at room temperature. 
C)  They lower the energy of activation. 
D)  They can be used over and over again. 
E)  They are typically effective only at high concentrations. 
A)  They are globular proteins. 
B)  They enable cells to carry out chemical reactions at room temperature. 
C)  They lower the energy of activation. 
D)  They can be used over and over again. 
E)  They are typically effective only at high concentrations.

Question 7

______ is an alkaloid used to dilate pupils in eye examinations.

Accepted Answer

A)  Cocaine 
B)  Atropine 
C)  Caffeine 
D)  Morphine 
E)  Nicotine 
A)  Cocaine 
B)  Atropine 
C)  Caffeine 
D)  Morphine 
E)  Nicotine

Question 8

Which comprise most of the middle lamella?

Accepted Answer

A)  hemicelluloses 
B)  pectins 
C)  lipids 
D)  chitins 
E)  starches 
A)  hemicelluloses 
B)  pectins 
C)  lipids 
D)  chitins 
E)  starches

Question 9

Which are examples of triglycerides?

Accepted Answer

A)  oils and fats 
B)  fats and steroids 
C)  oils and starches 
D)  starches and proteins 
E)  proteins and fats 
A)  oils and fats 
B)  fats and steroids 
C)  oils and starches 
D)  starches and proteins 
E)  proteins and fats

Question 10

Which of the following consists of beta-glucose subunits?

Accepted Answer

A)  amylose 
B)  amylopectin 
C)  chitin 
D)  cellulose 
E)  glycogen 
A)  amylose 
B)  amylopectin 
C)  chitin 
D)  cellulose 
E)  glycogen

Question 11

Which of the following statements about secondary metabolites is FALSE?

Accepted Answer

A)  They are found in all cells of a plant. 
B)  Some function as chemical signals or in the defense of the plant against herbivores. 
C)  They frequently are synthesized in one part of the plant and stored in another. 
D)  Some are produced only after the plant has been damaged. 
E)  Their concentration in a plant can vary greatly over a 24-hour period. 
A)  They are found in all cells of a plant. 
B)  Some function as chemical signals or in the defense of the plant against herbivores. 
C)  They frequently are synthesized in one part of the plant and stored in another. 
D)  Some are produced only after the plant has been damaged. 
E)  Their concentration in a plant can vary greatly over a 24-hour period.

Question 12

Which of the following statements about hydrolysis reactions is FALSE?

Accepted Answer

A)  They are energy-yielding reactions. 
B)  They are a type of condensation reaction. 
C)  They involve the addition of a molecule of water. 
D)  An example is the conversion of a polymer to its monomers. 
E)  An example is the conversion of disaccharides to monosaccharides. 
A)  They are energy-yielding reactions. 
B)  They are a type of condensation reaction. 
C)  They involve the addition of a molecule of water. 
D)  An example is the conversion of a polymer to its monomers. 
E)  An example is the conversion of disaccharides to monosaccharides.

Question 13

______ is a secondary metabolite responsible for adding compressive strength, stiffness, and waterproofing to the plant cell wall.

Accepted Answer

A)  Tannin 
B)  Lignin 
C)  Cellulose 
D)  Flavone 
E)  Flavonol 
A)  Tannin 
B)  Lignin 
C)  Cellulose 
D)  Flavone 
E)  Flavonol

Question 14

The monomers of nucleic acids are:

Accepted Answer

A)  DNA and RNA. 
B)  nucleotides. 
C)  ribose and deoxyribose. 
D)  ATP and ADP. 
E)  genes. 
A)  DNA and RNA. 
B)  nucleotides. 
C)  ribose and deoxyribose. 
D)  ATP and ADP. 
E)  genes.

Question 15

In a phospholipid, the phosphate group is attached directly to the glycerol backbone.

Accepted Answer

A) True 
 B)False

Question 16

The formation of ______ from ______ occurs by dehydration synthesis.

Accepted Answer

A)  glucose and fructose; sucrose 
B)  glucose; starch 
C)  monomers; polymers 
D)  glucose; cellulose 
E)  sucrose; glucose and fructose 
A)  glucose and fructose; sucrose 
B)  glucose; starch 
C)  monomers; polymers 
D)  glucose; cellulose 
E)  sucrose; glucose and fructose

Question 17

In contrast to unsaturated fatty acids, saturated fatty acids have one or more kinks that prevent close packing.

Accepted Answer

A) True 
 B)False

Question 18

Adenosine triphosphate is a type of:

Accepted Answer

A)  fatty acid. 
B)  amino acid. 
C)  enzyme. 
D)  steroid. 
E)  nucleotide. 
A)  fatty acid. 
B)  amino acid. 
C)  enzyme. 
D)  steroid. 
E)  nucleotide.

Question 19

Which of the following is characterized by the presence of four interconnected hydrocarbon rings?

Accepted Answer

A)  steroids 
B)  lignin 
C)  epicuticular wax 
D)  phospholipids 
E)  triglycerides 
A)  steroids 
B)  lignin 
C)  epicuticular wax 
D)  phospholipids 
E)  triglycerides

Question 20

Allelopathy is the process by which a chemical produced by one plant inhibits the growth of competitors.

Accepted Answer

A) True 
 B)False

Exam 2: The Molecular Composition of Plant Cells

The monomer of ___________ is N-acetylglucoseamine.

The denaturation of a protein involves a disruption in its tertiary structure.

When a polypeptide is hydrolyzed, many peptide bonds are formed.

A common ______ structure of proteins involves a hydrogen bond between the amino group of one amino acid and the carboxyl group of an amino acid farther along the peptide chain.

Pentoses and hexoses have a carbonyl group in the ring form but not the chain form.

Which of the following statements about enzymes is FALSE?

______ is an alkaloid used to dilate pupils in eye examinations.

Which comprise most of the middle lamella?

Which are examples of triglycerides?

Which of the following consists of beta-glucose subunits?

Which of the following statements about secondary metabolites is FALSE?

Which of the following statements about hydrolysis reactions is FALSE?

______ is a secondary metabolite responsible for adding compressive strength, stiffness, and waterproofing to the plant cell wall.

The monomers of nucleic acids are:

In a phospholipid, the phosphate group is attached directly to the glycerol backbone.

The formation of ______ from ______ occurs by dehydration synthesis.

In contrast to unsaturated fatty acids, saturated fatty acids have one or more kinks that prevent close packing.

Adenosine triphosphate is a type of:

Which of the following is characterized by the presence of four interconnected hydrocarbon rings?

Allelopathy is the process by which a chemical produced by one plant inhibits the growth of competitors.

Botany: an Introduction

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

The Process of Evolution

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

Filters

The formation of from occurs by dehydration synthesis.