Question 1

An essential functional group involved in cellular energy transfer is the _______ group.

Accepted Answer

A)  phosphate 
B)  amino 
C)  sulfhydryl 
D)  hydroxyl 
E)  saccharide 
A)  phosphate 
B)  amino 
C)  sulfhydryl 
D)  hydroxyl 
E)  saccharide

Question 2

Polymerization reactions in which polysaccharides are synthesized from monosaccharides

Accepted Answer

A)  require the formation of phosphodiester bonds between the amino acids. 
B)  occur in the nucleus of the cell. 
C)  are hydrolysis reactions. 
D)  depend upon van der Waals forces to hold the amino acids together. 
E)  result in the formation of water. 
A)  require the formation of phosphodiester bonds between the amino acids. 
B)  occur in the nucleus of the cell. 
C)  are hydrolysis reactions. 
D)  depend upon van der Waals forces to hold the amino acids together. 
E)  result in the formation of water.

Question 3

Which of the following statements about polymers is false?

Accepted Answer

A)  Polymers are synthesized from monomers during condensation. 
B)  Polymers are synthesized from monomers during dehydration. 
C)  Polymers consist of at least two types of monomers. 
D)  Both a and c 
E)  Both b and c 
A)  Polymers are synthesized from monomers during condensation. 
B)  Polymers are synthesized from monomers during dehydration. 
C)  Polymers consist of at least two types of monomers. 
D)  Both a and c 
E)  Both b and c

Question 4

Carbohydrates made up of two simple sugars are called _______.

Accepted Answer

The answer of Carbohydrates made up of two simple sugars...

Question 5

Large molecules that contain carbon and are held together by covalent bonds are categorized as

Accepted Answer

A)  proteins. 
B)  polymers. 
C)  nucleic acids. 
D)  macromolecules. 
E)  monomers. 
A)  proteins. 
B)  polymers. 
C)  nucleic acids. 
D)  macromolecules. 
E)  monomers.

Question 6

Which of the following physiological functions is not usually served by proteins?

Accepted Answer

A)  Catalysis 
B)  Energy reserve 
C)  Structural support 
D)  Defense 
E)  Hormone binding 
A)  Catalysis 
B)  Energy reserve 
C)  Structural support 
D)  Defense 
E)  Hormone binding

Question 7

Which of the following is not a macromolecule?

Accepted Answer

A)  RNA 
B)  DNA 
C)  Vitamin D, E, or K 
D)  A protein 
E)  Salt 
A)  RNA 
B)  DNA 
C)  Vitamin D, E, or K 
D)  A protein 
E)  Salt

Question 8

A molecule that has an important role in long-term storage of energy is

Accepted Answer

A)  a steroid. 
B)  RNA. 
C)  glycogen. 
D)  an amino acid. 
E)  hexose. 
A)  a steroid. 
B)  RNA. 
C)  glycogen. 
D)  an amino acid. 
E)  hexose.

Question 9

An amino acid that is small enough to fit into tight corners of protein molecules is

Accepted Answer

A)  proline. 
B)  glycine. 
C)  cysteine. 
D)  asparagine. 
E)  glutamine. 
A)  proline. 
B)  glycine. 
C)  cysteine. 
D)  asparagine. 
E)  glutamine.

Question 10

Quaternary structure is found in proteins

Accepted Answer

A)  composed of subunits. 
B)  of membranes. 
C)  of the quadruple complex. 
D)  that change over time. 
E)  None of the above 
A)  composed of subunits. 
B)  of membranes. 
C)  of the quadruple complex. 
D)  that change over time. 
E)  None of the above

Question 11

Which of the following statements about starch is false?

Accepted Answer

A)  Starch may be partially branched. 
B)  Starch is a polymer of glucose. 
C)  Starch is formed by the condensation of monomers. 
D)  The properties of starch are very similar to those of cellulose. 
E)  Starch may be digested by people. 
A)  Starch may be partially branched. 
B)  Starch is a polymer of glucose. 
C)  Starch is formed by the condensation of monomers. 
D)  The properties of starch are very similar to those of cellulose. 
E)  Starch may be digested by people.

Question 12

A phospholipid differs from a triglyceride in that phospholipids

Accepted Answer

A)  are not derivatives of glycerol. 
B)  are amphipathic. 
C)  do not have both hydrophilic and hydrophobic parts. 
D)  are used to store energy for the cell. 
E)  do not contain fatty acids. 
A)  are not derivatives of glycerol. 
B)  are amphipathic. 
C)  do not have both hydrophilic and hydrophobic parts. 
D)  are used to store energy for the cell. 
E)  do not contain fatty acids.

Question 13

Quaternary structure of proteins refers to

Accepted Answer

A)  the arrangement of the protein's atoms in three-dimensional space. 
B)  whether the chain is an $\alpha$ helix or $\beta$ pleated sheet. 
C)  the number and kind of polypeptide subunits the protein has. 
D)  the four-fold symmetry of the protein. 
E)  the lipids or carbohydrates that are attached to the proteins. 
A)  the arrangement of the protein's atoms in three-dimensional space. 
B)  whether the chain is an $\alpha$ helix or $\beta$ pleated sheet. 
C)  the number and kind of polypeptide subunits the protein has. 
D)  the four-fold symmetry of the protein. 
E)  the lipids or carbohydrates that are attached to the proteins.

Question 14

The amino acid leucine

Accepted Answer

A)  is found in all proteins. 
B)  cannot form peptide linkages. 
C)  has a hydrophobic side chain. 
D)  has a hydrophilic side chain. 
E)  is identical to the amino acid lysine. 
A)  is found in all proteins. 
B)  cannot form peptide linkages. 
C)  has a hydrophobic side chain. 
D)  has a hydrophilic side chain. 
E)  is identical to the amino acid lysine.

Question 15

Which of the following statements about condensation reactions is not true?

Accepted Answer

A)  Protein synthesis results from them. 
B)  Polysaccharide synthesis results from them. 
C)  They involve covalent bonds. 
D)  They consume water as a reactant. 
E)  Different condensation reactions produce different kinds of macromolecules. 
A)  Protein synthesis results from them. 
B)  Polysaccharide synthesis results from them. 
C)  They involve covalent bonds. 
D)  They consume water as a reactant. 
E)  Different condensation reactions produce different kinds of macromolecules.

Question 16

A disulfide bridge is formed by

Accepted Answer

A)  two cysteine side chains. 
B)  two glycerol linkages. 
C)  two proline side chains. 
D)  condensation. 
E)  hydrolysis. 
A)  two cysteine side chains. 
B)  two glycerol linkages. 
C)  two proline side chains. 
D)  condensation. 
E)  hydrolysis.

Question 17

Which of the following amino acids would, when incorporated into a polypeptide chain (not at the N or C terminus), make the charge of the polypeptide more positive?

Accepted Answer

A)  Alanine 
B)  Arginine 
C)  Aspartate 
D)  Serine 
E)  Cysteine 
A)  Alanine 
B)  Arginine 
C)  Aspartate 
D)  Serine 
E)  Cysteine

Question 18

Which of the following characteristics distinguishes carbohydrates from other macromolecule types?

Accepted Answer

A)  Carbohydrates are constructed of monomers that always have a ring structure. 
B)  Carbohydrates never contain nitrogen. 
C)  Carbohydrates consist of a carbon bonded to hydrogen and a hydroxyl group. 
D)  Carbohydrates contain glycerol. 
E)  None of the above 
A)  Carbohydrates are constructed of monomers that always have a ring structure. 
B)  Carbohydrates never contain nitrogen. 
C)  Carbohydrates consist of a carbon bonded to hydrogen and a hydroxyl group. 
D)  Carbohydrates contain glycerol. 
E)  None of the above

Question 19

Lipids form the barriers surrounding various compartments within an organism. Which property of lipids makes them a good barrier?

Accepted Answer

A)  Many biologically important molecules are not soluble in lipids. 
B)  Lipids are polymers. 
C)  Lipids store energy. 
D)  Triglycerides are lipids. 
E)  Lipids release large amounts of energy when broken down. 
A)  Many biologically important molecules are not soluble in lipids. 
B)  Lipids are polymers. 
C)  Lipids store energy. 
D)  Triglycerides are lipids. 
E)  Lipids release large amounts of energy when broken down.

Question 20

Cholesterol is classified as a(n) _______.

Accepted Answer

The answer of Cholesterol is classified as a(n) _______....

Exam 3: Proteins, Carbohydrates, and Lipids

An essential functional group involved in cellular energy transfer is the _______ group.

Polymerization reactions in which polysaccharides are synthesized from monosaccharides

Which of the following statements about polymers is false?

Carbohydrates made up of two simple sugars are called _______.

Large molecules that contain carbon and are held together by covalent bonds are categorized as

Which of the following physiological functions is not usually served by proteins?

Which of the following is not a macromolecule?

A molecule that has an important role in long-term storage of energy is

An amino acid that is small enough to fit into tight corners of protein molecules is

Quaternary structure is found in proteins

Which of the following statements about starch is false?

A phospholipid differs from a triglyceride in that phospholipids

Quaternary structure of proteins refers to

The amino acid leucine

Which of the following statements about condensation reactions is not true?

A disulfide bridge is formed by

Which of the following amino acids would, when incorporated into a polypeptide chain (not at the N or C terminus), make the charge of the polypeptide more positive?

Which of the following characteristics distinguishes carbohydrates from other macromolecule types?

Lipids form the barriers surrounding various compartments within an organism. Which property of lipids makes them a good barrier?

Cholesterol is classified as a(n) _______.

Studying Life

Small Molecules and the Chemistry of Life

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Population Ecology

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

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