Question 1

Which of the following is an amino group?

Accepted Answer

A) -CO 
B) -OH 
C) -COOH 
D) -NH2 
A) -CO 
B) -OH 
C) -COOH 
D) -NH2

Question 2

Amino acids can be distinguished from one another by

Accepted Answer

A) the type of bond between the R group and the rest of the amino acid molecule. 
B) the chemical properties of their R groups. 
C) the number of R groups found on the amino acid molecules. 
D) the chemical properties of their amino and carboxyl groups. 
A) the type of bond between the R group and the rest of the amino acid molecule. 
B) the chemical properties of their R groups. 
C) the number of R groups found on the amino acid molecules. 
D) the chemical properties of their amino and carboxyl groups.

Question 3

Which of the following statements about animal cell lipids is false?

Accepted Answer

A) Fats are a form of lipid that function to store energy. 
B) Cholesterol is a type of lipid that is a component of cell membranes and steroid hormones. 
C) Many lipids function as enzymes. 
D) Phospholipids are important components of cell membranes. 
A) Fats are a form of lipid that function to store energy. 
B) Cholesterol is a type of lipid that is a component of cell membranes and steroid hormones. 
C) Many lipids function as enzymes. 
D) Phospholipids are important components of cell membranes.

Question 4

Lactose intolerance is the inability to

Accepted Answer

A) digest lactose. 
B) produce milk proteins. 
C) digest cellulose. 
D) produce lactose. 
A) digest lactose. 
B) produce milk proteins. 
C) digest cellulose. 
D) produce lactose.

Question 5

The storage form of carbohydrates is in animals and in plants.

Accepted Answer

A) glycogen ...cellulose 
B) glycogen ...starch 
C) starch ...glycogen 
D) cellulose ...glycogen 
A) glycogen ...cellulose 
B) glycogen ...starch 
C) starch ...glycogen 
D) cellulose ...glycogen

Question 6

If you were to add olive oil to your food as part of a diet to lower your risk of atherosclerotic disease,you would use olive oil that

Accepted Answer

A) is hydrogenated. 
B) is modified to be solid at room temperature. 
C) has lard added to it. 
D) is liquid at room temperature. 
A) is hydrogenated. 
B) is modified to be solid at room temperature. 
C) has lard added to it. 
D) is liquid at room temperature.

Question 7

Which of the following contains a carboxyl and an amino group?

Accepted Answer

A) vinegar 
B) fats 
C) sugars 
D) amino acids 
A) vinegar 
B) fats 
C) sugars 
D) amino acids

Question 8

Which of the following statements regarding carbon is false?

Accepted Answer

A) Carbon has the ability to bond with up to six other atoms. 
B) Carbon has the capacity to form single and double bonds. 
C) Carbon has a tendency to form covalent bonds. 
D) Carbon has the ability to bond together to form extensive,branched,or unbranched "carbon skeletons." 
A) Carbon has the ability to bond with up to six other atoms. 
B) Carbon has the capacity to form single and double bonds. 
C) Carbon has a tendency to form covalent bonds. 
D) Carbon has the ability to bond together to form extensive,branched,or unbranched "carbon skeletons."

Question 9

In what part of the world did the mutation for lactose tolerance first appear?

Accepted Answer

A) Northern Europe 
B) Eastern Asia 
C) South America 
D) North America 
A) Northern Europe 
B) Eastern Asia 
C) South America 
D) North America

Question 10

Sucrose is formed

Accepted Answer

A) from two glucose molecules. 
B) when glucose and lactose are combined. 
C) when ionic bonds link two monosaccharides. 
D) from two monosaccharides through dehydration synthesis. 
A) from two glucose molecules. 
B) when glucose and lactose are combined. 
C) when ionic bonds link two monosaccharides. 
D) from two monosaccharides through dehydration synthesis.

Question 11

A protein containing more than one polypeptide chain exhibits the level of protein structure.

Accepted Answer

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

Question 12

A phospholipid is composed of

Accepted Answer

A) one fatty acid molecule linked to one glycerol molecule and two phosphate groups. 
B) one fatty acid molecule linked to three glycerol molecules. 
C) one glycerol molecule linked to three phosphate groups. 
D) one glycerol molecule linked to one phosphate group and two fatty acids. 
A) one fatty acid molecule linked to one glycerol molecule and two phosphate groups. 
B) one fatty acid molecule linked to three glycerol molecules. 
C) one glycerol molecule linked to three phosphate groups. 
D) one glycerol molecule linked to one phosphate group and two fatty acids.

Question 13

How are genes used by cells to build proteins?

Accepted Answer

A) The genes in DNA direct the synthesis of an RNA molecule,which is used to build a protein. 
B) The genes in RNA direct the synthesis of a DNA molecule,which is used to build a protein. 
C) The genes in RNA direct the synthesis of proteins directly. 
D) DNA is transcribed into an amino acid sequence. 
A) The genes in DNA direct the synthesis of an RNA molecule,which is used to build a protein. 
B) The genes in RNA direct the synthesis of a DNA molecule,which is used to build a protein. 
C) The genes in RNA direct the synthesis of proteins directly. 
D) DNA is transcribed into an amino acid sequence.

Question 14

Cellulose differs from starch in that

Accepted Answer

A) most animals cannot break down cellulose,whereas starch is easily digested. 
B) starch is made of glucose monomers,whereas cellulose is made of fructose monomers. 
C) cellulose is highly branched,whereas starch is unbranched. 
D) glycogen is formed by plants and cellulose by animals. 
A) most animals cannot break down cellulose,whereas starch is easily digested. 
B) starch is made of glucose monomers,whereas cellulose is made of fructose monomers. 
C) cellulose is highly branched,whereas starch is unbranched. 
D) glycogen is formed by plants and cellulose by animals.

Question 15

The development of atherosclerotic disease can result from a diet high in

Accepted Answer

A) sugars. 
B) saturated fats. 
C) protein. 
D) fiber. 
A) sugars. 
B) saturated fats. 
C) protein. 
D) fiber.

Question 16

A hydroxyl group is

Accepted Answer

A) characteristic of proteins. 
B) characteristic of alcohols. 
C) basic. 
D) also called a carbonyl group. 
A) characteristic of proteins. 
B) characteristic of alcohols. 
C) basic. 
D) also called a carbonyl group.

Question 17

Peptide bonds

Accepted Answer

A) are used to form amino acids. 
B) are formed by a hydrolysis reaction. 
C) link amino acids. 
D) form between fatty acids. 
A) are used to form amino acids. 
B) are formed by a hydrolysis reaction. 
C) link amino acids. 
D) form between fatty acids.

Question 18

An oil may be converted into a substance that is solid at room temperature by

Accepted Answer

A) removing water,causing a dehydration synthesis reaction to occur. 
B) adding hydrogens,decreasing the number of double bonds in the molecules. 
C) removing hydrogens,increasing the number of double bonds. 
D) cooling it,so that double bonds form and the fats solidify. 
A) removing water,causing a dehydration synthesis reaction to occur. 
B) adding hydrogens,decreasing the number of double bonds in the molecules. 
C) removing hydrogens,increasing the number of double bonds. 
D) cooling it,so that double bonds form and the fats solidify.

Question 19

Cows can derive nutrients from cellulose because

Accepted Answer

A) they chew their food so thoroughly that cellulose fibers are broken down. 
B) their intestinal tract contains cellulose- hydrolyzing microorganisms. 
C) they convert cellulose into starch,which is easily broken down in the intestinal tract. 
D) they produce the enzymes that break down cellulose. 
A) they chew their food so thoroughly that cellulose fibers are broken down. 
B) their intestinal tract contains cellulose- hydrolyzing microorganisms. 
C) they convert cellulose into starch,which is easily broken down in the intestinal tract. 
D) they produce the enzymes that break down cellulose.

Question 20

What feature of fats makes them hydrophobic?

Accepted Answer

A) Fats have carboxyl groups. 
B) Fats include one glycerol molecule. 
C) Fats have nonpolar hydrocarbon chains. 
D) Fats have polar fatty acids. 
A) Fats have carboxyl groups. 
B) Fats include one glycerol molecule. 
C) Fats have nonpolar hydrocarbon chains. 
D) Fats have polar fatty acids.

Exam 3: The Molecules of Cells

Which of the following is an amino group?

Amino acids can be distinguished from one another by

Which of the following statements about animal cell lipids is false?

Lactose intolerance is the inability to

The storage form of carbohydrates is in animals and in plants.

If you were to add olive oil to your food as part of a diet to lower your risk of atherosclerotic disease,you would use olive oil that

Which of the following contains a carboxyl and an amino group?

Which of the following statements regarding carbon is false?

In what part of the world did the mutation for lactose tolerance first appear?

Sucrose is formed

A protein containing more than one polypeptide chain exhibits the level of protein structure.

A phospholipid is composed of

How are genes used by cells to build proteins?

Cellulose differs from starch in that

The development of atherosclerotic disease can result from a diet high in

A hydroxyl group is

Peptide bonds

An oil may be converted into a substance that is solid at room temperature by

Cows can derive nutrients from cellulose because

What feature of fats makes them hydrophobic?

Biology: Exploring Life

The Chemical Basis of Life

A Tour of the Cell

The Working Cell

How Cells Harvest Chemical Energy

Photosynthesis: Using Light to Make Food

The Cellular Basis of Reproduction and Inheritance

Patterns of Inheritance

Molecular Biology of the Gene

How Genes Are Controlled

Dna Technology and Genomics

How Populations Evolve

The Origin of Species

Tracing Evolutionary History

Microbial Life: Prokaryotes and Protists

The Evolution of Plant and Fungal Diversity

The Evolution of Invertebrate Diversity

The Evolution of Vertebrate Diversity

Unifying Concepts of Animal Structure and Function

Nutrition and Digestion

Gas Exchange

Circulation

The Immune System

Control of Body Temperature and Water Balance

Hormones and the Endocrine System

Reproduction and Embryonic Development

Nervous Systems

The Senses

How Animals Move

Plant Structure,growth,and Reproduction

Plant Nutrition and Transport

Control Systems in Plants

The Biosphere: an Introduction to Earths Diverse Environments

Behavioral Adaptations to the Environment

Population Ecology

Communities and Ecosystems

Conservation Biology

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