Question 1

Which of the following is true about phospholipid bilayers?

Accepted Answer

A)  The hydrophobic head faces the cell exterior. 
B)  The polar heads face the cell interior and exterior. 
C)  The hydrophobic tail faces the cell interior. 
D)  The polar tails face the cell interior and exterior. 
E)  The interior of the layer is highly hydrophilic. 
A)  The hydrophobic head faces the cell exterior. 
B)  The polar heads face the cell interior and exterior. 
C)  The hydrophobic tail faces the cell interior. 
D)  The polar tails face the cell interior and exterior. 
E)  The interior of the layer is highly hydrophilic.

Question 2

Which lipid type does not have fatty acid tails?

Accepted Answer

A)  Phospholipids 
B)  Polysaccharides 
C)  Unsaturated fats 
D)  Steroids 
E)  Saturated fats 
A)  Phospholipids 
B)  Polysaccharides 
C)  Unsaturated fats 
D)  Steroids 
E)  Saturated fats

Question 3

Choose the monomer corresponding to the polymer stated.
 
-Hemoglobin

Accepted Answer

A) Glucose 
B) Nucleotide 
C) Fatty acid 
D) Amino acid 
A) Glucose 
B) Nucleotide 
C) Fatty acid 
D) Amino acid

Question 4

Match the molecules below with their functions.

-Contains information to build a new cell

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 5

Choose the monomer corresponding to the polymer stated.
 
-DNA

Accepted Answer

A) Glucose 
B) Nucleotide 
C) Fatty acid 
D) Amino acid 
A) Glucose 
B) Nucleotide 
C) Fatty acid 
D) Amino acid

Question 6

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

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 7

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 carbonyl group of simple sugars

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 8

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

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 9

Which two units combine in various ways to form lipids?

Accepted Answer

A)  a and b 
B)  a and c 
C)  b and c 
D)  b and d 
E)  c and d 
A)  a and b 
B)  a and c 
C)  b and c 
D)  b and d 
E)  c and d

Question 10

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below.
 
-The monomers of a polypeptide chain

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 11

Cellulose is ____.

Accepted Answer

A)  a polysaccharide found in cell walls of plants 
B)  a component of cell membranes 
C)  an oligosaccharide found in animals 
D)  formed by hydrolysis of monosaccharides 
E)  a component of invertebrate exoskeletons 
A)  a polysaccharide found in cell walls of plants 
B)  a component of cell membranes 
C)  an oligosaccharide found in animals 
D)  formed by hydrolysis of monosaccharides 
E)  a component of invertebrate exoskeletons

Question 12

What groups makes amino acids and fatty acids acidic?

Accepted Answer

A)  Carbonyl 
B)  Hydroxyl 
C)  Ketone 
D)  Carboxyl 
E)  Acetyl 
A)  Carbonyl 
B)  Hydroxyl 
C)  Ketone 
D)  Carboxyl 
E)  Acetyl

Question 13

Figure 3.11 B
  
-What are the arrows pointing to in the accompanying figure?

Accepted Answer

A)  Double ionic bonds 
B)  Single ionic bonds 
C)  Double covalent bonds 
D)  Single covalent bonds 
E)  Hydrogen bonds 
A)  Double ionic bonds 
B)  Single ionic bonds 
C)  Double covalent bonds 
D)  Single covalent bonds 
E)  Hydrogen bonds

Question 14

The sugars in DNA and RNA ____.

Accepted Answer

A)  have a different number of carbon atoms 
B)  have the same structural formulas 
C)  are the two components of sucrose 
D)  have different numbers of oxygen atoms 
E)  are disaccharides 
A)  have a different number of carbon atoms 
B)  have the same structural formulas 
C)  are the two components of sucrose 
D)  have different numbers of oxygen atoms 
E)  are disaccharides

Question 15

What may be a result of the denaturation of proteins?

Accepted Answer

A)  Formation of hydrogen bonds 
B)  Loss of three-dimensional structure 
C)  Removal of R groups from amino acids 
D)  No change in enzyme activity 
E)  Formation of covalent bonds 
A)  Formation of hydrogen bonds 
B)  Loss of three-dimensional structure 
C)  Removal of R groups from amino acids 
D)  No change in enzyme activity 
E)  Formation of covalent bonds

Question 16

Cholesterol ____.

Accepted Answer

A)  has a rigid backbone of four nitrogen rings 
B)  is the most common steroid in animal tissue 
C)  is a lipid with a fatty-acid component 
D)  is needed to inhibit sexual development and maturity 
E)  is needed to lubricate feathers 
A)  has a rigid backbone of four nitrogen rings 
B)  is the most common steroid in animal tissue 
C)  is a lipid with a fatty-acid component 
D)  is needed to inhibit sexual development and maturity 
E)  is needed to lubricate feathers

Question 17

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 aldehyde group in simple sugars

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 18

Match the molecules below with their functions.

-The main component of plant cell walls

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 19

The versatility of which atoms can be assembled into a wide variety of organic compounds?

Accepted Answer

A)  Carbon 
B)  Glucose 
C)  Hydrocarbon 
D)  Polymer 
E)  Starch 
A)  Carbon 
B)  Glucose 
C)  Hydrocarbon 
D)  Polymer 
E)  Starch

Question 20

Oligosaccharides include ____.

Accepted Answer

A)  sucrose only 
B)  glucose only 
C)  fructose only 
D)  lactose only 
E)  both sucrose and lactose 
A)  sucrose only 
B)  glucose only 
C)  fructose only 
D)  lactose only 
E)  both sucrose and lactose

Exam 3: Molecules of Life

Which of the following is true about phospholipid bilayers?

Which lipid type does not have fatty acid tails?

Choose the monomer corresponding to the polymer stated. -Hemoglobin

Match the molecules below with their functions. -Contains information to build a new cell

Choose the monomer corresponding to the polymer stated. -DNA

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

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 carbonyl group of simple sugars

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

Which two units combine in various ways to form lipids?

Classification. The following are basic building blocks of biopolymers. Match the building blocks with the statements below. -The monomers of a polypeptide chain

Cellulose is ____.

What groups makes amino acids and fatty acids acidic?

Figure 3.11 B -What are the arrows pointing to in the accompanying figure?

The sugars in DNA and RNA ____.

What may be a result of the denaturation of proteins?

Cholesterol ____.

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 aldehyde group in simple sugars

Match the molecules below with their functions. -The main component of plant cell walls

The versatility of which atoms can be assembled into a wide variety of organic compounds?

Oligosaccharides include ____.

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