Question 1

Glycogen is a polysaccharide used for energy storage by

Accepted Answer

A) animals. 
B) plants. 
C) protistans. 
D) bacteria. 
E) fungi. 
A) animals. 
B) plants. 
C) protistans. 
D) bacteria. 
E) fungi.

Question 2

The atom present in all organic compounds is

Accepted Answer

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

Question 3

Monosaccharides may be characterized by all EXCEPT which of the following?

Accepted Answer

A) a ketone group 
B) carbon, hydrogen, and oxygen in a 1:2:1 ratio 
C) a backbone of five to six carbon atoms 
D) one aldehyde group 
E) the presence of glycerol and fatty acids 
A) a ketone group 
B) carbon, hydrogen, and oxygen in a 1:2:1 ratio 
C) a backbone of five to six carbon atoms 
D) one aldehyde group 
E) the presence of glycerol and fatty acids

Question 4

Which reaction breaks down large molecules into smaller molecules?

Accepted Answer

A) synthesis 
B) cleavage 
C) condensation 
D) polymerization 
E) both cleavage and condensation 
A) synthesis 
B) cleavage 
C) condensation 
D) polymerization 
E) both cleavage and condensation

Question 5

A -CH3 group is a(n) __________ group.

Accepted Answer

A) carboxyl 
B) hydroxyl 
C) amino 
D) methyl 
E) carbonyl 
A) carboxyl 
B) hydroxyl 
C) amino 
D) methyl 
E) carbonyl

Question 6

The sequence of amino acids is the __________ structure of proteins.

Accepted Answer

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

Question 7

What kind of bond exists between two amino acids in a protein?

Accepted Answer

A) peptide 
B) ionic 
C) hydrogen 
D) amino 
E) sulfhydroxyl 
A) peptide 
B) ionic 
C) hydrogen 
D) amino 
E) sulfhydroxyl

Question 8

Which of the following is NOT found in every nucleotide?

Accepted Answer

A) ribose 
B) a phosphate group 
C) a single-ring base 
D) a double-ring base 
E) nitrogen 
A) ribose 
B) a phosphate group 
C) a single-ring base 
D) a double-ring base 
E) nitrogen

Question 9

Glucose and fructose are different

Accepted Answer

A) in the number of carbons they possess. 
B) in their proportion in sucrose molecules. 
C) in the way that their atoms are arranged. 
D) in the number of double bonds they possess. 
E) both in the way that their atoms are arranged and in the number of double bonds they possess. 
A) in the number of carbons they possess. 
B) in their proportion in sucrose molecules. 
C) in the way that their atoms are arranged. 
D) in the number of double bonds they possess. 
E) both in the way that their atoms are arranged and in the number of double bonds they possess.

Question 10

Chitin is a polysaccharide with __________ atoms attached to the glucose backbone.

Accepted Answer

A) magnesium 
B) phosphorus 
C) potassium 
D) nitrogen 
E) sulfur 
A) magnesium 
B) phosphorus 
C) potassium 
D) nitrogen 
E) sulfur

Question 11

An -NH2 group is a(n) __________ group.

Accepted Answer

A) carboxyl 
B) hydroxyl 
C) amine 
D) methyl 
E) carbonyl 
A) carboxyl 
B) hydroxyl 
C) amine 
D) methyl 
E) carbonyl

Question 12

_____ refers to activities by which cells acquire and use energy.

Accepted Answer

A) Condensation 
B) Hydrolysis 
C) Synthesis 
D) Metabolism 
E) Dehydration 
A) Condensation 
B) Hydrolysis 
C) Synthesis 
D) Metabolism 
E) Dehydration

Question 13

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 14

A -COOH group is a(n) _____ group.

Accepted Answer

A) carboxyl 
B) hydroxyl 
C) amino 
D) methyl 
E) carbonyl 
A) carboxyl 
B) hydroxyl 
C) amino 
D) methyl 
E) carbonyl

Question 15

The backbone of organic molecules consists of covalently bonded __________ atoms.

Accepted Answer

A) oxygen 
B) hydrogen 
C) functional-group 
D) carbon 
E) all of these 
A) oxygen 
B) hydrogen 
C) functional-group 
D) carbon 
E) all of these

Question 16

Condensation and hydrolysis are accomplished in cells by

Accepted Answer

A) bonding attraction. 
B) the action of enzymes. 
C) spontaneous action. 
D) functional group interactions. 
E) all of these. 
A) bonding attraction. 
B) the action of enzymes. 
C) spontaneous action. 
D) functional group interactions. 
E) all of these.

Question 17

The most plentiful sugar in nature is

Accepted Answer

A) glucose. 
B) sucrose. 
C) fructose. 
D) maltose. 
E) lactose. 
A) glucose. 
B) sucrose. 
C) fructose. 
D) maltose. 
E) lactose.

Question 18

Condensation reactions typically produce

Accepted Answer

A) monomers. 
B) salts. 
C) polymers. 
D) simple sugars. 
E) amino acids. 
A) monomers. 
B) salts. 
C) polymers. 
D) simple sugars. 
E) amino acids.

Question 19

The figure below has a majority of which of the following:

Accepted Answer

A) carbohydrates 
B) nucleotides 
C) proteins 
D) phospholipids 
E) amino acids 
A) carbohydrates 
B) nucleotides 
C) proteins 
D) phospholipids 
E) amino acids

Question 20

The dotted areas in the figure below indicate where __________ reactions will occur to produce __________ and __________.

Accepted Answer

A) condensation; covalent bonds; hydroxyl ions 
B) electron transfer; covalent bonds; water molecules 
C) condensation; covalent bonds; water molecules 
D) cleavage; covalent bonds; hydrogen ions 
E) condensation; ionic bonds; hydrogen ions 
A) condensation; covalent bonds; hydroxyl ions 
B) electron transfer; covalent bonds; water molecules 
C) condensation; covalent bonds; water molecules 
D) cleavage; covalent bonds; hydrogen ions 
E) condensation; ionic bonds; hydrogen ions

Exam 3: Molecules of Life

Glycogen is a polysaccharide used for energy storage by

The atom present in all organic compounds is

Monosaccharides may be characterized by all EXCEPT which of the following?

Which reaction breaks down large molecules into smaller molecules?

A -CH3 group is a(n) __________ group.

The sequence of amino acids is the __________ structure of proteins.

What kind of bond exists between two amino acids in a protein?

Which of the following is NOT found in every nucleotide?

Glucose and fructose are different

Chitin is a polysaccharide with __________ atoms attached to the glucose backbone.

An -NH2 group is a(n) __________ group.

_____ refers to activities by which cells acquire and use energy.

Sucrose is composed of

A -COOH group is a(n) _____ group.

The backbone of organic molecules consists of covalently bonded __________ atoms.

Condensation and hydrolysis are accomplished in cells by

The most plentiful sugar in nature is

Condensation reactions typically produce

The figure below has a majority of which of the following:

The dotted areas in the figure below indicate where __________ reactions will occur to produce __________ and __________.

Invitation to Biology

Lifes Chemical Basis

Cell Structure and Function

A Closer Look at Cell Membranes

Ground Rules of Metabolism

Where It Startsphotosynthesis

Energy-Releasing Pathways

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Dna Structure and Function

From Dna to Protein

Controls Over Genes

Recombinant Dna and Genetic Engineering

The Macroevolutionary Puzzle

Emergence of Evolutionary Thought

Organizing Information About Species

The Origin and Evolution of Life

Viruses and Prokaryotes

Protists the Simplest Eukaryotes

Plants

Fungi

Animals: the Invertebrates

Animal Evolution the Chordates

Human Evolution: a Case Study

Plant Tissues

Plant Nutrition and Transport

Plant Reproduction

Plant Growth and Development

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Protection, Support, and Movement

Circulation

Immunity

Respiration

Digestion and Human Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Population Ecology

Community Structure and Biodiversity

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters

A -CH₃ group is a(n) __________ group.

An -NH₂group is a(n) __________ group.

The dotted areas in the figure below indicate where reactions will occur to produce and __.