Question 1

______ 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 B

Question 2

The principal role of ATP in the cell is:

Accepted Answer

A) catalyzing chemical reactions. 
B) providing energy. 
C) serving as structural support. 
D) functioning as a hormone. 
E) keeping the phospholipid tails of membranes aligned 
A) catalyzing chemical reactions. 
B) providing energy. 
C) serving as structural support. 
D) functioning as a hormone. 
E) keeping the phospholipid tails of membranes aligned B

Question 3

Pectins and hemicelluloses constitute the matrix of the plant cell wall in which cellulose microfibrils are embedded.

Accepted Answer

A) True 
 B)False  True

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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 6

A fat differs from a phospholipid in that a fat contains:

Accepted Answer

A) a phosphate group 
B) 1 glycerol 
C) 3 fatty acids 
D) a steroid 
E) a wax 
A) a phosphate group 
B) 1 glycerol 
C) 3 fatty acids 
D) a steroid 
E) a wax

Question 7

By definition, all organic molecules contain carbon, hydrogen, and oxygen.

Accepted Answer

A) True 
 B)False

Question 8

How many different kinds of amino acids are used to build proteins?

Accepted Answer

A) 5 
B) 10 
C) 20 
D) 50 
E) 100 
A) 5 
B) 10 
C) 20 
D) 50 
E) 100

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

A nucleotide consists of a sugar, a phosphate group, and an amino group.

Accepted Answer

A) True 
 B)False

Question 11

Who am I? I form a "blanket" that stabilizes photosynthetic membranes and thus helps the plant cope with heat.

Accepted Answer

A) isoprene. 
B) taxol. 
C) anthocyanin. 
D) salicylic acid. 
E) tannin. 
A) isoprene. 
B) taxol. 
C) anthocyanin. 
D) salicylic acid. 
E) tannin.

Question 12

Plants break down their carbohydrate reserves and transport starch to the site where it is needed.

Accepted Answer

A) True 
 B)False

Question 13

The common transport form of sugar in plants is ______ and in animals is ______.

Accepted Answer

A) sucrose; glucose 
B) glucose; sucrose 
C) starch; sucrose 
D) maltose; lactose 
E) fructose; maltose 
A) sucrose; glucose 
B) glucose; sucrose 
C) starch; sucrose 
D) maltose; lactose 
E) fructose; maltose

Question 14

Essential oils are types of:

Accepted Answer

A) tannins. 
B) flavonoids. 
C) alkaloids. 
D) terpenoids. 
E) anthocyanins. 
A) tannins. 
B) flavonoids. 
C) alkaloids. 
D) terpenoids. 
E) anthocyanins.

Question 15

Nucleic acids are different from proteins in that nucleic acids contain:

Accepted Answer

A) carbon. 
B) hydrogen. 
C) nitrogen. 
D) phosphorus. 
E) sulfur 
A) carbon. 
B) hydrogen. 
C) nitrogen. 
D) phosphorus. 
E) sulfur

Question 16

The linear sequence of amino acids is called the ______ structure of a protein.

Accepted Answer

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

Question 17

Unsaturated fats are usually solid at room temperature.

Accepted Answer

A) True 
 B)False

Question 18

What is the most abundant organic compound known?

Accepted Answer

A) cellulose 
B) sucrose 
C) DNA 
D) phospholipid 
E) starch 
A) cellulose 
B) sucrose 
C) DNA 
D) phospholipid 
E) starch

Question 19

_________ is a monosaccharide, and ______________ is a disaccharide.

Accepted Answer

A) Fructose; lactose 
B) Maltose; ribose 
C) Cellulose; sucrose 
D) Sucrose; glucose 
E) Maltose; lactose 
A) Fructose; lactose 
B) Maltose; ribose 
C) Cellulose; sucrose 
D) Sucrose; glucose 
E) Maltose; lactose

Question 20

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

Exam 2: The Molecular Composition of Plant Cells

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

The principal role of ATP in the cell is:

Pectins and hemicelluloses constitute the matrix of the plant cell wall in which cellulose microfibrils are embedded.

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

Which of the following statements about hydrolysis reactions is FALSE?

A fat differs from a phospholipid in that a fat contains:

By definition, all organic molecules contain carbon, hydrogen, and oxygen.

How many different kinds of amino acids are used to build proteins?

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

A nucleotide consists of a sugar, a phosphate group, and an amino group.

Who am I? I form a "blanket" that stabilizes photosynthetic membranes and thus helps the plant cope with heat.

Plants break down their carbohydrate reserves and transport starch to the site where it is needed.

The common transport form of sugar in plants is ______ and in animals is ______.

Essential oils are types of:

Nucleic acids are different from proteins in that nucleic acids contain:

The linear sequence of amino acids is called the ______ structure of a protein.

Unsaturated fats are usually solid at room temperature.

What is the most abundant organic compound known?

_________ is a monosaccharide, and ______________ is a disaccharide.

Which of the following consists of beta-glucose subunits?

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 common transport form of sugar in plants is and in animals is .

_ is a monosaccharide, and ______ is a disaccharide.