Question 1

Which of the following is NOT true of lipids?

Accepted Answer

A)  They store energy. 
B)  They function as structural components of cellular membranes. 
C)  They function as hormones. 
D)  They are nonpolar. 
E)  They have many oxygen-containing functional groups. 
A)  They store energy. 
B)  They function as structural components of cellular membranes. 
C)  They function as hormones. 
D)  They are nonpolar. 
E)  They have many oxygen-containing functional groups.

Question 2

Which pair is mismatched?

Accepted Answer

A)  monsaccharide-maltose 
B)  disaccharide-sucrose 
C)  polysaccharide-cellulose 
D)  hexose-glucose 
E)  pentose-ribose 
A)  monsaccharide-maltose 
B)  disaccharide-sucrose 
C)  polysaccharide-cellulose 
D)  hexose-glucose 
E)  pentose-ribose

Question 3

You isolate a compound that is insoluble in water, has alternating single and double bonds, and has a bright orange color.You correctly conclude that this compound is a:

Accepted Answer

A)  protein. 
B)  nucleic acid. 
C)  polysaccharide. 
D)  steroid. 
E)  carotenoid. 
A)  protein. 
B)  nucleic acid. 
C)  polysaccharide. 
D)  steroid. 
E)  carotenoid.

Question 4

By definition, geometric isomers are mirror images of each other.
__________________

Accepted Answer

A) True 
 B)False

Question 5

Some proteins are important biological buffers because:

Accepted Answer

A)  they react with water to produce carbon dioxide, which neutralizes acids. 
B)  they contain acidic as well as basic groups. 
C)  they are able to absorb great amounts of carbon dioxide during condensation reactions. 
D)  they produce carbonic acid upon hydrolysis. 
E)  they contain nonpolar groups that exclude water molecules. 
A)  they react with water to produce carbon dioxide, which neutralizes acids. 
B)  they contain acidic as well as basic groups. 
C)  they are able to absorb great amounts of carbon dioxide during condensation reactions. 
D)  they produce carbonic acid upon hydrolysis. 
E)  they contain nonpolar groups that exclude water molecules.

Question 6

If you partially hydrogenate oleic acid, the resulting molecule most likely would:

Accepted Answer

A)  decrease the risk of cardiovascular disease. 
B)  contain more double bonds. 
C)  lose a carbon atom. 
D)  lose a carboxyl group. 
E)  have a double bond changed from cis to trans. 
A)  decrease the risk of cardiovascular disease. 
B)  contain more double bonds. 
C)  lose a carbon atom. 
D)  lose a carboxyl group. 
E)  have a double bond changed from cis to trans.

Question 7

The major difference between a structural lipid, such as those in cell membranes, and a storage fat is the fact that the structural lipid:

Accepted Answer

A)  most commonly contains phosphate. 
B)  does not contain glycerol. 
C)  has four fatty acids attached to glucose. 
D)  is entirely hydrophobic. 
E)  is nonpolar. 
A)  most commonly contains phosphate. 
B)  does not contain glycerol. 
C)  has four fatty acids attached to glucose. 
D)  is entirely hydrophobic. 
E)  is nonpolar.

Question 8

Amyloplasts are organelles that store:

Accepted Answer

A)  fat. 
B)  starch. 
C)  protein. 
D)  lipids. 
E)  DNA. 
A)  fat. 
B)  starch. 
C)  protein. 
D)  lipids. 
E)  DNA.

Question 9

Carbohydrate molecules:

Accepted Answer

A)  serve as structural components of human cell walls. 
B)  form the regulatory compounds known as enzymes. 
C)  are a source of energy. 
D)  help protect vital organs from damage. 
E)  contain the genetic information of a cell. 
A)  serve as structural components of human cell walls. 
B)  form the regulatory compounds known as enzymes. 
C)  are a source of energy. 
D)  help protect vital organs from damage. 
E)  contain the genetic information of a cell.

Question 10

MATCHING
Match the molecule with the appropriate word or phrase.
a.carbohydrate
c.nucleic acid
b.lipid
d.protein
-cellulose

Accepted Answer

The answer of MATCHING
Match the molecule with the appropriate word...

Question 11

Carotenoids are composed of isoprene subunits.
__________________

Accepted Answer

A) True 
 B)False

Question 12

The difference between a hexose and a pentose is that:

Accepted Answer

A)  a hexose is saturated, and a pentose is undersaturated. 
B)  a hexose is hydrophilic, and a pentose is hydrophobic. 
C)  a hexose always has six hydroxyl groups, and a pentose always has five. 
D)  a hexose always has six carbons, but a pentose always has five carbons. 
E)  a hexose can be polymerized, but a pentose cannot. 
A)  a hexose is saturated, and a pentose is undersaturated. 
B)  a hexose is hydrophilic, and a pentose is hydrophobic. 
C)  a hexose always has six hydroxyl groups, and a pentose always has five. 
D)  a hexose always has six carbons, but a pentose always has five carbons. 
E)  a hexose can be polymerized, but a pentose cannot.

Question 13

All of the following types of chemical bonds are responsible for maintaining the tertiary structure of this polypeptide except:

Accepted Answer

A)  ionic bonds. 
B)  hydrogen bonds. 
C)  hydrophobic interactions. 
D)  disulfide bonds. 
E)  peptide bonds. 
A)  ionic bonds. 
B)  hydrogen bonds. 
C)  hydrophobic interactions. 
D)  disulfide bonds. 
E)  peptide bonds.

Question 14

MATCHING
Match the molecule with the appropriate word or phrase.
a.carbohydrate
c.nucleic acid
b.lipid
d.protein
-a beta-pleated sheet is one typical structure

Accepted Answer

The answer of MATCHING
Match the molecule with the appropriate word...

Question 15

This functional group forms bridges that help stabilize protein quaternary structure:

Accepted Answer

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

Question 16

When glucose and fructose undergo condensation, maltose is produced as a product.
__________________

Accepted Answer

A) True 
 B)False

Question 17

The hydrolysis of triacylglycerol will yield:

Accepted Answer

A)  three fatty acids and one glycerol. 
B)  three glycerols and one fatty acid. 
C)  two fatty acids and three glycerols. 
D)  one fatty acid, one amino acid, and one glucose. 
E)  one fatty acid, one phosphate, and one glycerol. 
A)  three fatty acids and one glycerol. 
B)  three glycerols and one fatty acid. 
C)  two fatty acids and three glycerols. 
D)  one fatty acid, one amino acid, and one glucose. 
E)  one fatty acid, one phosphate, and one glycerol.

Question 18

MATCHING
Match the molecule with the appropriate word or phrase.
a.carbohydrate
c.nucleic acid
b.lipid
d.protein
-monomers are joined by phosphodiester linkages

Accepted Answer

The answer of MATCHING
Match the molecule with the appropriate word...

Question 19

The most abundant molecules in this structure are:

Accepted Answer

A)  structural proteins. 
B)  polysaccharides. 
C)  triacylglycerols. 
D)  phospholipids. 
E)  polypeptides. 
A)  structural proteins. 
B)  polysaccharides. 
C)  triacylglycerols. 
D)  phospholipids. 
E)  polypeptides.

Question 20

When a nucleic acid undergoes hydrolysis, the resulting subunits are:

Accepted Answer

A)  amino acids. 
B)  monosaccharides. 
C)  nucleotides. 
D)  fatty acids. 
E)  carotenoids. 
A)  amino acids. 
B)  monosaccharides. 
C)  nucleotides. 
D)  fatty acids. 
E)  carotenoids.

Exam 3: The Chemistry of Life: Organic Compounds

Which of the following is NOT true of lipids?

Which pair is mismatched?

You isolate a compound that is insoluble in water, has alternating single and double bonds, and has a bright orange color.You correctly conclude that this compound is a:

By definition, geometric isomers are mirror images of each other. __________________

Some proteins are important biological buffers because:

If you partially hydrogenate oleic acid, the resulting molecule most likely would:

The major difference between a structural lipid, such as those in cell membranes, and a storage fat is the fact that the structural lipid:

Amyloplasts are organelles that store:

Carbohydrate molecules:

MATCHING Match the molecule with the appropriate word or phrase. a.carbohydrate c.nucleic acid b.lipid d.protein -cellulose

Carotenoids are composed of isoprene subunits. __________________

The difference between a hexose and a pentose is that:

All of the following types of chemical bonds are responsible for maintaining the tertiary structure of this polypeptide except:

MATCHING Match the molecule with the appropriate word or phrase. a.carbohydrate c.nucleic acid b.lipid d.protein -a beta-pleated sheet is one typical structure

This functional group forms bridges that help stabilize protein quaternary structure:

When glucose and fructose undergo condensation, maltose is produced as a product. __________________

The hydrolysis of triacylglycerol will yield:

MATCHING Match the molecule with the appropriate word or phrase. a.carbohydrate c.nucleic acid b.lipid d.protein -monomers are joined by phosphodiester linkages

The most abundant molecules in this structure are:

When a nucleic acid undergoes hydrolysis, the resulting subunits are:

A View of Life

Atoms and Molecules: the Chemical Basis of Life

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

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