Question 1

Write the empirical formula for a carbohydrate.

Accepted Answer

(CH<sub>2</sub>O)<sub>n</sub>

Question 2

Figure 3.7B
  
-The figure above illustrates a ____ reaction that produces one ____ and a ____.

Accepted Answer

A)  condensation; hydroxyl; polymer 
B)  condensation; water molecule; polymer 
C)  cleavage; water molecule; monomer 
D)  rearrangement; water molecule; polymer 
E)  rearrangement; hydrogen ion; polymer 
A)  condensation; hydroxyl; polymer 
B)  condensation; water molecule; polymer 
C)  cleavage; water molecule; monomer 
D)  rearrangement; water molecule; polymer 
E)  rearrangement; hydrogen ion; polymer B

Question 3

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group.
-The group that is acidic

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E)  
F)-PO4-
G)-CHO 
A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E)  
F)-PO4-
G)-CHO A

Question 4

A single atom of carbon may form up to ____ covalent bonds with other atoms.

Accepted Answer

A)  two 
B)  three 
C)  four 
D)  five 
E)  six 
A)  two 
B)  three 
C)  four 
D)  five 
E)  six

Question 5

Match the molecules below with their functions.

-Responsible for sexual development

Accepted Answer

A) Glycogen 
B) Cellulose 
C) Starch 
D) Phospholipid 
E) Wax
F)Steroid
G)Cholesterol
H)DNA
I)RNA 
A) Glycogen 
B) Cellulose 
C) Starch 
D) Phospholipid 
E) Wax
F)Steroid
G)Cholesterol
H)DNA
I)RNA

Question 6

Match the molecules below with their functions.

-Precursor for important molecules such as bile salts

Accepted Answer

A) Glycogen 
B) Cellulose 
C) Starch 
D) Phospholipid 
E) Wax
F)Steroid
G)Cholesterol
H)DNA
I)RNA 
A) Glycogen 
B) Cellulose 
C) Starch 
D) Phospholipid 
E) Wax
F)Steroid
G)Cholesterol
H)DNA
I)RNA

Question 7

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below.
 
-The basic unit of glycogen

Accepted Answer

A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide 
A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide

Question 8

Which of the following is not an effect of protein denaturation?

Accepted Answer

A)  cooked egg whites 
B)  prion disease 
C)  egg whites beaten to stiff peaks 
D)  tenderized meat using acid 
E)  melting butter by heating 
A)  cooked egg whites 
B)  prion disease 
C)  egg whites beaten to stiff peaks 
D)  tenderized meat using acid 
E)  melting butter by heating

Question 9

Which of the following stores the most energy in chemical bonds?

Accepted Answer

A)  glucose 
B)  sucrose 
C)  galactose 
D)  glycogen 
E)  ribose 
A)  glucose 
B)  sucrose 
C)  galactose 
D)  glycogen 
E)  ribose

Question 10

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group.
-The group on the carboxyl-terminal end of proteins

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E)  
F)-PO4-
G)-CHO 
A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E)  
F)-PO4-
G)-CHO

Question 11

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group.
-The group that makes lipid head's hydrophilic

Accepted Answer

A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E)  
F)-PO4-
G)-CHO 
A) -COOH 
B) -CH3 
C) -NH2 
D) -OH 
E)  
F)-PO4-
G)-CHO

Question 12

Choose the most appropriate description for each item.
-Enzymes

Accepted Answer

A) A six-carbon sugar 
B) Found in DNA and RNA 
C) Principal components of cell membranes 
D) Affect metabolic reaction rates 
A) A six-carbon sugar 
B) Found in DNA and RNA 
C) Principal components of cell membranes 
D) Affect metabolic reaction rates

Question 13

Which of the following may characterize monosaccharides?

Accepted Answer

A)  An amino group 
B)  An amide group 
C)  A backbone of eight carbon atoms 
D)  One carbonyl group 
E)  The presence of glycerol and fatty acids 
A)  An amino group 
B)  An amide group 
C)  A backbone of eight carbon atoms 
D)  One carbonyl group 
E)  The presence of glycerol and fatty acids

Question 14

Sucrose is composed of____.

Accepted Answer

A)  two molecules of fructose 
B)  two molecules of glucose 
C)  a molecule of fructose and a molecule of glucose 
D)  a molecule of fructose and a molecule of galactose 
E)  a monosaccharide and a disaccharide 
A)  two molecules of fructose 
B)  two molecules of glucose 
C)  a molecule of fructose and a molecule of glucose 
D)  a molecule of fructose and a molecule of galactose 
E)  a monosaccharide and a disaccharide

Question 15

Which of the following is also known as a dehydration reaction?

Accepted Answer

A)  condensation 
B)  hydrolysis 
C)  synthesis 
D)  oxidation 
E)  decomposition 
A)  condensation 
B)  hydrolysis 
C)  synthesis 
D)  oxidation 
E)  decomposition

Question 16

A molecule that consists only of carbon and hydrogen atoms is called a _______________.

Accepted Answer

A)  hydrocarbon 
B)  nucleic acid 
C)  sugar 
D)  starch 
E)  carbon 
A)  hydrocarbon 
B)  nucleic acid 
C)  sugar 
D)  starch 
E)  carbon

Question 17

What kind of bonds link amino acids to form the basic sequence of a protein?

Accepted Answer

A)  Disulfide 
B)  Hydrogen 
C)  Ionic 
D)  Peptide 
E)  Noncovalent 
A)  Disulfide 
B)  Hydrogen 
C)  Ionic 
D)  Peptide 
E)  Noncovalent

Question 18

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below.
 
-The basic unit of RNA

Accepted Answer

A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide 
A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide

Question 19

Which type of lipid is composed of long-chain fatty acids attached to long-chain alcohols?

Accepted Answer

A)  Triglycerides 
B)  Phospholipids 
C)  Sterols 
D)  Waxes 
E)  Most neutral fats 
A)  Triglycerides 
B)  Phospholipids 
C)  Sterols 
D)  Waxes 
E)  Most neutral fats

Question 20

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below.
 
-The basic unit of cellulose

Accepted Answer

A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide 
A) Amino acid 
B) Glucose 
C) Carboxyl head 
D) Fatty acid tail 
E) Nucleotide

Exam 3: Molecules of Life

Write the empirical formula for a carbohydrate.

Figure 3.7B -The figure above illustrates a ____ reaction that produces one ____ and a ____.

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group. -The group that is acidic

A single atom of carbon may form up to ____ covalent bonds with other atoms.

Match the molecules below with their functions. -Responsible for sexual development

Match the molecules below with their functions. -Precursor for important molecules such as bile salts

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -The basic unit of glycogen

Which of the following is not an effect of protein denaturation?

Which of the following stores the most energy in chemical bonds?

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group. -The group on the carboxyl-terminal end of proteins

Classification. The following are chemical functional groups that may be part of a biologically active molecule. Answer the questions by matching the items with the most appropriate group. -The group that makes lipid head's hydrophilic

Choose the most appropriate description for each item. -Enzymes

Which of the following may characterize monosaccharides?

Sucrose is composed of____.

Which of the following is also known as a dehydration reaction?

A molecule that consists only of carbon and hydrogen atoms is called a _______________.

What kind of bonds link amino acids to form the basic sequence of a protein?

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -The basic unit of RNA

Which type of lipid is composed of long-chain fatty acids attached to long-chain alcohols?

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -The basic unit of cellulose

Invitation to Biology

Life's Chemical Bases

Cell Structure

Ground Rules of Metabolism

Where it Starts—Photosynthesis

How Cells Release Chemical Energy

DNA Structure and Function

From DNA to Protein

Control of Gene Expression

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizing Information about Species

Life's Origin and Early Evolution

Viruses, Bacteria, and Archaea

Protists: The Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution: The Invertebrates

Animal Evolution: The Chordates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Communication Strategies in Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive System

Animal Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

Figure 3.7B -The figure above illustrates a reaction that produces one and a .