Question 1

Which of the following are lipids?

Accepted Answer

A) sterols 
B) triglycerides 
C) oils 
D) waxes 
E) all of these 
A) sterols 
B) triglycerides 
C) oils 
D) waxes 
E) all of these

Question 2

Which carbohydrate is used to strengthen the shell of crabs?

Accepted Answer

A) glucose 
B) lactose 
C) glycogen 
D) amylose 
E) chitin 
A) glucose 
B) lactose 
C) glycogen 
D) amylose 
E) chitin

Question 3

Which of the following is NOT one of the five categories of enzyme catalyzed reactions?

Accepted Answer

A) functional group transfer 
B) electron transfer 
C) condensation 
D) cleavage 
E) neutralization 
A) functional group transfer 
B) electron transfer 
C) condensation 
D) cleavage 
E) neutralization

Question 4

Amino acids in a polypeptide are part of

Accepted Answer

A) the primary structure. 
B) carbohydrates. 
C) lipids. 
D) nucleic acids. 
E) most macromolecules. 
A) the primary structure. 
B) carbohydrates. 
C) lipids. 
D) nucleic acids. 
E) most macromolecules.

Question 5

Glucose and fructose

Accepted Answer

A) form rings with the same number of carbon atoms. 
B) both have an oxygen atom as part of their ring structure. 
C) are alike in that both have identical functional groups. 
D) contain the same number of hydrogen atoms and hydroxyl groups. 
E) are disaccharides. 
A) form rings with the same number of carbon atoms. 
B) both have an oxygen atom as part of their ring structure. 
C) are alike in that both have identical functional groups. 
D) contain the same number of hydrogen atoms and hydroxyl groups. 
E) are disaccharides.

Question 6

Cellulose is

Accepted Answer

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

Question 7

Steroids

Accepted Answer

A) have no fatty-acid component. 
B) consist of four rings. 
C) may have different numbers, types, and positions of functional groups attached to them. 
D) are a specialized type of lipid. 
E) are all of these. 
A) have no fatty-acid component. 
B) consist of four rings. 
C) may have different numbers, types, and positions of functional groups attached to them. 
D) are a specialized type of lipid. 
E) are all of these.

Question 8

Amino acids are the building blocks for

Accepted Answer

A) proteins. 
B) carbohydrates. 
C) lipids. 
D) nucleic acids. 
E) most macromolecules. 
A) proteins. 
B) carbohydrates. 
C) lipids. 
D) nucleic acids. 
E) most macromolecules.

Question 9

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

Accepted Answer

A) 2 
B) 3 
C) 4 
D) 5 
E) 6 
A) 2 
B) 3 
C) 4 
D) 5 
E) 6

Question 10

Triglycerides are

Accepted Answer

A) carbohydrates. 
B) nucleotides. 
C) proteins. 
D) neutral fats. 
E) amino acids. 
A) carbohydrates. 
B) nucleotides. 
C) proteins. 
D) neutral fats. 
E) amino acids.

Question 11

Which of the following does not belong?

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 12

Which of the following is NOT true of polysaccharides?

Accepted Answer

A) composed of many linked monosaccharides 
B) may be straight and unbranched or highly branched 
C) most likely made of glucose molecules if they are one of the natural polysaccharides 
D) may be insoluble because of their large size and structure 
E) are formed by cleavage reactions   
A) composed of many linked monosaccharides 
B) may be straight and unbranched or highly branched 
C) most likely made of glucose molecules if they are one of the natural polysaccharides 
D) may be insoluble because of their large size and structure 
E) are formed by cleavage reactions

Question 13

Cholesterol

Accepted Answer

A) has a rigid backbone of four carbon rings. 
B) is the most common sterol in animal tissue. 
C) is a lipid without a fatty-acid component. 
D) is needed to produce sexual development and maturity. 
E) is all of these. 
A) has a rigid backbone of four carbon rings. 
B) is the most common sterol in animal tissue. 
C) is a lipid without a fatty-acid component. 
D) is needed to produce sexual development and maturity. 
E) is all of these.

Question 14

Hydrogenation is a chemical process that

Accepted Answer

A) turns liquid oil to solid fats. 
B) turns amino acids into proteins. 
C) turns DNA into lipids. 
D) creates stable alternative energy sources. 
E) does none of these. 
A) turns liquid oil to solid fats. 
B) turns amino acids into proteins. 
C) turns DNA into lipids. 
D) creates stable alternative energy sources. 
E) does none of these.

Question 15

The final by-products of many condensation reactions are

Accepted Answer

A) carbon dioxide molecules. 
B) hydrogen ions. 
C) hydroxyl ions. 
D) oxygen gas and hydrogen gas. 
E) water molecules. 
A) carbon dioxide molecules. 
B) hydrogen ions. 
C) hydroxyl ions. 
D) oxygen gas and hydrogen gas. 
E) water molecules.

Question 16

Which of these components of a tossed salad will pass through the human digestive tract with the least digestion?

Accepted Answer

A) sugar (in the dressing) 
B) oil (in the dressing) 
C) starch (in the croutons) 
D) cellulose (in the lettuce leaves) 
E) protein (in the bacon bits) 
A) sugar (in the dressing) 
B) oil (in the dressing) 
C) starch (in the croutons) 
D) cellulose (in the lettuce leaves) 
E) protein (in the bacon bits)

Question 17

Plants store their excess carbohydrates in the form of

Accepted Answer

A) starch. 
B) glycogen. 
C) glucose. 
D) cellulose. 
E) fats. 
A) starch. 
B) glycogen. 
C) glucose. 
D) cellulose. 
E) fats.

Question 18

_____ are 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 19

What kind of reaction produces large molecules by linking small molecules?

Accepted Answer

A) oxidation 
B) reduction 
C) condensation 
D) hydrolysis 
E) decarboxylation 
A) oxidation 
B) reduction 
C) condensation 
D) hydrolysis 
E) decarboxylation

Question 20

The figure below illustrates one possible __________ structure of __________.

Accepted Answer

A) primary; proteins 
B) primary; carbohydrates 
C) primary; lipids 
D) secondary; proteins 
E) tertiary; proteins 
A) primary; proteins 
B) primary; carbohydrates 
C) primary; lipids 
D) secondary; proteins 
E) tertiary; proteins

Exam 3: Molecules of Life

Which of the following are lipids?

Which carbohydrate is used to strengthen the shell of crabs?

Which of the following is NOT one of the five categories of enzyme catalyzed reactions?

Amino acids in a polypeptide are part of

Glucose and fructose

Cellulose is

Steroids

Amino acids are the building blocks for

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

Triglycerides are

Which of the following does not belong?

Which of the following is NOT true of polysaccharides?

Cholesterol

Hydrogenation is a chemical process that

The final by-products of many condensation reactions are

Which of these components of a tossed salad will pass through the human digestive tract with the least digestion?

Plants store their excess carbohydrates in the form of

_____ are long-chain fatty acids attached to long-chain alcohols.

What kind of reaction produces large molecules by linking small molecules?

The figure below illustrates one possible __________ structure of __________.

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

The figure below illustrates one possible structure of .