Question 1

Starch consists of alpha-glucose subunits, whereas cellulose consists of beta-glucose.

Accepted Answer

A) True 
 B)False  True

Question 2

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 C

Question 3

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. C

Question 4

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 5

________ is composed of two sugar subunits linked covalently.

Accepted Answer

A)  Cellulose 
B)  Fructose 
C)  Ribose 
D)  Glucose 
E)  Sucrose 
A)  Cellulose 
B)  Fructose 
C)  Ribose 
D)  Glucose 
E)  Sucrose

Question 6

The most water-repellant of the lipids are:

Accepted Answer

A)  steroids 
B)  waxes 
C)  celluloses 
D)  suberins 
E)  cutins 
A)  steroids 
B)  waxes 
C)  celluloses 
D)  suberins 
E)  cutins

Question 7

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 8

DNA molecules are the largest macromolecules found in cells.

Accepted Answer

A) True 
 B)False

Question 9

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 10

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

Accepted Answer

A) True 
 B)False

Question 11

Amylose and amylopectin are the two forms of starch.

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

A peptide bond occurs between the ______ groups of adjacent amino acids in polypeptides.

Accepted Answer

A)  amino and carboxyl 
B)  sulfhydryl 
C)  amino and phosphate 
D)  carboxyl and hydroxyl 
E)  amino 
A)  amino and carboxyl 
B)  sulfhydryl 
C)  amino and phosphate 
D)  carboxyl and hydroxyl 
E)  amino

Question 14

Which of the following secondary metabolites consists of isoprene units?

Accepted Answer

A)  morphine 
B)  atropine 
C)  anthocyanin 
D)  taxol 
E)  salicylic acid 
A)  morphine 
B)  atropine 
C)  anthocyanin 
D)  taxol 
E)  salicylic acid

Question 15

The largest group of plant phenolics are the:

Accepted Answer

A)  tannins. 
B)  cardiac glycosides. 
C)  flavonoids. 
D)  lignins. 
E)  salicylic acids. 
A)  tannins. 
B)  cardiac glycosides. 
C)  flavonoids. 
D)  lignins. 
E)  salicylic acids.

Question 16

A peptide bond is a linkage between an amino group and a carboxyl group.

Accepted Answer

A) True 
 B)False

Question 17

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 18

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 19

The tertiary structure of a protein is a result of all of the following EXCEPT:

Accepted Answer

A)  the folding of the secondary structure. 
B)  the linear sequence of amino acids. 
C)  the formation of disulfide bridges. 
D)  interactions among the R groups of a single polypeptide. 
E)  interactions between two or more polypeptide chains. 
A)  the folding of the secondary structure. 
B)  the linear sequence of amino acids. 
C)  the formation of disulfide bridges. 
D)  interactions among the R groups of a single polypeptide. 
E)  interactions between two or more polypeptide chains.

Question 20

Which lipid is a major component of cork cell walls?

Accepted Answer

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

Exam 2: The Molecular Composition of Plant Cells

Starch consists of alpha-glucose subunits, whereas cellulose consists of beta-glucose.

Which of the following is a primary metabolite?

The principal polysaccharide in the plant cell wall is:

When an oil undergoes hydrolysis, the products are:

________ is composed of two sugar subunits linked covalently.

The most water-repellant of the lipids are:

Essential oils are types of:

DNA molecules are the largest macromolecules found in cells.

What is the most abundant organic compound known?

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

Amylose and amylopectin are the two forms of starch.

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

A peptide bond occurs between the ______ groups of adjacent amino acids in polypeptides.

Which of the following secondary metabolites consists of isoprene units?

The largest group of plant phenolics are the:

A peptide bond is a linkage between an amino group and a carboxyl group.

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

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

The tertiary structure of a protein is a result of all of the following EXCEPT:

Which lipid is a major component of cork cell walls?

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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