Question 1

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 2

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

Accepted Answer

A) True 
 B)False

Question 3

When an oil undergoes hydrolysis, the products are:

Accepted Answer

A) 1 amino acid and 3 glycerols 
B) many glucose monomers 
C) 1 fatty acid and 3 glycerols 
D) 1 sucrose and 3 fatty acids 
E) 1 glycerol and 3 fatty acids 
A) 1 amino acid and 3 glycerols 
B) many glucose monomers 
C) 1 fatty acid and 3 glycerols 
D) 1 sucrose and 3 fatty acids 
E) 1 glycerol and 3 fatty acids

Question 4

Who am I? I give cell walls a lamellar appearance?

Accepted Answer

A) phospholipid 
B) cutin 
C) suberin 
D) wax 
E) lignin 
A) phospholipid 
B) cutin 
C) suberin 
D) wax 
E) lignin

Question 5

Energy is released in the reaction in which a phosphate group is linked to ADP forming ATP.

Accepted Answer

A) True 
 B)False

Question 6

A steroid is characterized by the presence of three interconnected hydrocarbon rings.

Accepted Answer

A) True 
 B)False

Question 7

In all organisms except prokaryotes, an important role of sterols is to:

Accepted Answer

A) serve as storage forms of energy. 
B) prevent water loss. 
C) catalyze chemical reactions. 
D) provide strength to the cell wall. 
E) stabilize the phospholipid tails in cell membranes. 
A) serve as storage forms of energy. 
B) prevent water loss. 
C) catalyze chemical reactions. 
D) provide strength to the cell wall. 
E) stabilize the phospholipid tails in cell membranes.

Question 8

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 9

The principal polysaccharide in the plant cell wall is:

Accepted Answer

A) starch. 
B) fructan. 
C) cellulose. 
D) glycogen. 
E) sucrose. 
A) starch. 
B) fructan. 
C) cellulose. 
D) glycogen. 
E) sucrose.

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

All proteins have primary, secondary, tertiary, and quaternary structures.

Accepted Answer

A) True 
 B)False

Question 12

Which substance makes up more than half of all living matter and more than 90 percent of the weight of most plant tissues?

Accepted Answer

A) Protein 
B) Cellulose 
C) Starch 
D) Triglyceride 
E) Water 
A) Protein 
B) Cellulose 
C) Starch 
D) Triglyceride 
E) Water

Question 13

In a phospholipid bilayer, each hydrophobic tail is oriented next to a hydrophilic head of the adjancent molecule.

Accepted Answer

A) True 
 B)False

Question 14

When many nucleotides undergo dehydration synthesis, the product(s) is(are):

Accepted Answer

A) a five-carbon sugar, a nitrogenous base, and a phosphate group. 
B) many amino acids. 
C) many monosaccharides. 
D) a polysaccharide 
E) a nucleic acid 
A) a five-carbon sugar, a nitrogenous base, and a phosphate group. 
B) many amino acids. 
C) many monosaccharides. 
D) a polysaccharide 
E) a nucleic acid

Question 15

The main function of cutin and suberin is to:

Accepted Answer

A) serve as structural components of cellular membranes. 
B) prevent water loss. 
C) catalyze chemical reactions. 
D) provide strength to the cell wall. 
E) serve as hormones. 
A) serve as structural components of cellular membranes. 
B) prevent water loss. 
C) catalyze chemical reactions. 
D) provide strength to the cell wall. 
E) serve as hormones.

Question 16

Which of the following is a primary metabolite?

Accepted Answer

A) phytoalexin 
B) morphine 
C) glucose 
D) taxol 
E) rubber 
A) phytoalexin 
B) morphine 
C) glucose 
D) taxol 
E) rubber

Question 17

The most abundant organic molecules in nature are:

Accepted Answer

A) proteins. 
B) carbohydrates. 
C) lipids. 
D) nucleic acids. 
E) water molecules. 
A) proteins. 
B) carbohydrates. 
C) lipids. 
D) nucleic acids. 
E) water molecules.

Question 18

DNA molecules are the largest macromolecules found in cells.

Accepted Answer

A) True 
 B)False

Question 19

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 20

An RNA molecule consists of a single strand of nucleotides.

Accepted Answer

A) True 
 B)False

Exam 2: The Molecular Composition of Plant Cells

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

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

When an oil undergoes hydrolysis, the products are:

Who am I? I give cell walls a lamellar appearance?

Energy is released in the reaction in which a phosphate group is linked to ADP forming ATP.

A steroid is characterized by the presence of three interconnected hydrocarbon rings.

In all organisms except prokaryotes, an important role of sterols is to:

Which of the following statements about enzymes is FALSE?

The principal polysaccharide in the plant cell wall is:

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

All proteins have primary, secondary, tertiary, and quaternary structures.

Which substance makes up more than half of all living matter and more than 90 percent of the weight of most plant tissues?

In a phospholipid bilayer, each hydrophobic tail is oriented next to a hydrophilic head of the adjancent molecule.

When many nucleotides undergo dehydration synthesis, the product(s) is(are):

The main function of cutin and suberin is to:

Which of the following is a primary metabolite?

The most abundant organic molecules in nature are:

DNA molecules are the largest macromolecules found in cells.

Which are examples of triglycerides?

An RNA molecule consists of a single strand of nucleotides.

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

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