Question 1

Which of the following statements about proteins is true?

Accepted Answer

A)  Denaturation leads to bond disruption, and the molecule turns into liquid. 
B)  Denaturation is always irreversible. 
C)  Final folded structure can reveal the steps of protein folding. 
D)  Some proteins form a complete 3-D structure only when they interact with their targets. 
A)  Denaturation leads to bond disruption, and the molecule turns into liquid. 
B)  Denaturation is always irreversible. 
C)  Final folded structure can reveal the steps of protein folding. 
D)  Some proteins form a complete 3-D structure only when they interact with their targets.

Question 2

The following question is based on the 15 molecules illustrated in the figures.

Which of the following molecules is a disaccharide?

Accepted Answer

A)  1 and 4 
B)  3 
C)  6 
D)  15 
A)  1 and 4 
B)  3 
C)  6 
D)  15

Question 3

Which of the following can be used to predict the 3-D structure of the protein?

Accepted Answer

A)  peptide bonds between different amino acids 
B)  sequence of amino acids in the polypeptide chain 
C)  side chains of various amino acids 
D)  number of water molecules in the vicinity 
A)  peptide bonds between different amino acids 
B)  sequence of amino acids in the polypeptide chain 
C)  side chains of various amino acids 
D)  number of water molecules in the vicinity

Question 4

An amino acid is to a protein as a glucose molecule is to ________.

Accepted Answer

A)  glycogen 
B)  a lipid 
C)  nucleic acid 
D)  a tripeptide 
A)  glycogen 
B)  a lipid 
C)  nucleic acid 
D)  a tripeptide

Question 5

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

Accepted Answer

A)  The two strands of the double helix would separate. 
B)  The phosphodiester linkages of the polynucleotide backbone would be broken. 
C)  The pyrimidines would be separated from the deoxyribose sugars. 
D)  All bases would be separated from the deoxyribose sugars. 
A)  The two strands of the double helix would separate. 
B)  The phosphodiester linkages of the polynucleotide backbone would be broken. 
C)  The pyrimidines would be separated from the deoxyribose sugars. 
D)  All bases would be separated from the deoxyribose sugars.

Question 6

The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are in the α form. Which of the following could amylase break down?

Accepted Answer

A)  glycogen, starch, and amylopectin 
B)  glycogen and cellulose 
C)  cellulose and chitin 
D)  starch, chitin, and cellulose 
A)  glycogen, starch, and amylopectin 
B)  glycogen and cellulose 
C)  cellulose and chitin 
D)  starch, chitin, and cellulose

Question 7

Use the following figure to answer the question.   Which of the following chemical reactions is represented in the figure?

Accepted Answer

A)  is a hydrolysis reaction 
B)  results in a peptide bond 
C)  joins two fatty acids together 
D)  links two polymers to form a monomer 
A)  is a hydrolysis reaction 
B)  results in a peptide bond 
C)  joins two fatty acids together 
D)  links two polymers to form a monomer

Question 8

Based on the information in the passage, the total number of heme groups present in four hemoglobin protein molecules is ________.

Accepted Answer

A)  4 
B)  8 
C)  12 
D)  16 
A)  4 
B)  8 
C)  12 
D)  16

Question 9

Which of the following is a palindromic sequence?

Accepted Answer

A)  5′-AGGTCC-3′ 3′-TCCAGG-5′ 
B)  5′-CCTTCC-3′ 3′-GCAAGG-5′ 
C)  5′-GAATCC-3′ 3′-CTTAGG-5′ 
D)  5′-GGATCC-3′ 3′-CCTAGG-5′ 
A)  5′-AGGTCC-3′ 3′-TCCAGG-5′ 
B)  5′-CCTTCC-3′ 3′-GCAAGG-5′ 
C)  5′-GAATCC-3′ 3′-CTTAGG-5′ 
D)  5′-GGATCC-3′ 3′-CCTAGG-5′

Question 10

How many molecules of water are required for the polymerization of a 22 monomer-long cellulose molecule?

Accepted Answer

A)  11 
B)  21 
C)  22 
D)  44 
A)  11 
B)  21 
C)  22 
D)  44

Question 11

The term insoluble fiber on food packages refers to which of the following molecules?

Accepted Answer

A)  cellulose 
B)  polypeptides 
C)  starch 
D)  amylopectin 
A)  cellulose 
B)  polypeptides 
C)  starch 
D)  amylopectin

Question 12

Which parts of the amino acids AA1 and AA2 are involved in the formation of a peptide bond?
AA1-AA2

Accepted Answer

A)  amino group of AA1 and carboxyl group of AA2 
B)  carboxyl group of AA1 and amino group of AA2 
C)  carboxyl group of AA1 and side chain of AA2 
D)  side chains of both AA1 and AA2 
A)  amino group of AA1 and carboxyl group of AA2 
B)  carboxyl group of AA1 and amino group of AA2 
C)  carboxyl group of AA1 and side chain of AA2 
D)  side chains of both AA1 and AA2

Question 13

Chitin is composed of glucose and ________.

Accepted Answer

A)  fructose 
B)  lactose 
C)  amino acid 
D)  N-acetyl glucosamine 
A)  fructose 
B)  lactose 
C)  amino acid 
D)  N-acetyl glucosamine

Question 14

Which part of an amino acid gives it its unique identity?

Accepted Answer

A)  the long carbon-hydrogen tails of the molecule 
B)  the carboxyl and amino groups 
C)  the components of its side chain 
D)  the glycerol molecule that forms the backbone of the amino acid 
A)  the long carbon-hydrogen tails of the molecule 
B)  the carboxyl and amino groups 
C)  the components of its side chain 
D)  the glycerol molecule that forms the backbone of the amino acid

Question 15

The following question is based on the 15 molecules illustrated in the figures.

Which molecule has both hydrophilic and hydrophobic properties and is found in plasma membranes?

Accepted Answer

A)  1 
B)  5 
C)  12 
D)  14 
A)  1 
B)  5 
C)  12 
D)  14

Question 16

The following question is based on the 15 molecules illustrated in the figures.

Which of the following pairs of molecules could be joined together by a peptide bond in a dehydration reaction?

Accepted Answer

A)  2 and 3 
B)  7 and 8 
C)  8 and 9 
D)  12 and 13 
A)  2 and 3 
B)  7 and 8 
C)  8 and 9 
D)  12 and 13

Question 17

The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. Which of the following options describes the property of hydrogenated vegetable oil?

Accepted Answer

A)  It is solid at room temperature. 
B)  It has more double bonds in the fatty acid chains. 
C)  It has fewer trans fatty acids. 
D)  It is less likely to block arteries. 
A)  It is solid at room temperature. 
B)  It has more double bonds in the fatty acid chains. 
C)  It has fewer trans fatty acids. 
D)  It is less likely to block arteries.

Question 18

Ovalbumin, the egg white protein is denatured in scrambled egg. Which of the following is not affected?

Accepted Answer

A)  primary structure of ovalbumin 
B)  secondary structure of ovalbumin 
C)  tertiary structure of ovalbumin 
D)  quaternary structure of ovalbumin 
A)  primary structure of ovalbumin 
B)  secondary structure of ovalbumin 
C)  tertiary structure of ovalbumin 
D)  quaternary structure of ovalbumin

Question 19

Homo sapiens have 23 pairs of chromosomes. What does the number '23' represent here?

Accepted Answer

A)  46 double-stranded DNA molecules in each somatic cell 
B)  23 single-stranded DNA molecules in each somatic cell 
C)  23 double-stranded DNA molecules in each somatic cell 
D)  several hundreds of genes on DNA but not on the chromosomes 
A)  46 double-stranded DNA molecules in each somatic cell 
B)  23 single-stranded DNA molecules in each somatic cell 
C)  23 double-stranded DNA molecules in each somatic cell 
D)  several hundreds of genes on DNA but not on the chromosomes

Question 20

Misfolding of polypeptides is a serious problem in cells. Which of the following diseases are associated with an accumulation of misfolded polypeptides?

Accepted Answer

A)  Alzheimer's only 
B)  Parkinson's only 
C)  Diabetes mellitus 
D)  Alzheimer's and Parkinson's 
A)  Alzheimer's only 
B)  Parkinson's only 
C)  Diabetes mellitus 
D)  Alzheimer's and Parkinson's

Exam 5: Biological Macromolecules and Lipids

Which of the following statements about proteins is true?

The following question is based on the 15 molecules illustrated in the figures. Which of the following molecules is a disaccharide?

Which of the following can be used to predict the 3-D structure of the protein?

An amino acid is to a protein as a glucose molecule is to ________.

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?

The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are in the α form. Which of the following could amylase break down?

Use the following figure to answer the question. Which of the following chemical reactions is represented in the figure?

Based on the information in the passage, the total number of heme groups present in four hemoglobin protein molecules is ________.

Which of the following is a palindromic sequence?

How many molecules of water are required for the polymerization of a 22 monomer-long cellulose molecule?

The term insoluble fiber on food packages refers to which of the following molecules?

Which parts of the amino acids AA1 and AA2 are involved in the formation of a peptide bond? AA1-AA2

Chitin is composed of glucose and ________.

Which part of an amino acid gives it its unique identity?

The following question is based on the 15 molecules illustrated in the figures. Which molecule has both hydrophilic and hydrophobic properties and is found in plasma membranes?

The following question is based on the 15 molecules illustrated in the figures. Which of the following pairs of molecules could be joined together by a peptide bond in a dehydration reaction?

The label on a container of margarine lists "hydrogenated vegetable oil" as the major ingredient. Which of the following options describes the property of hydrogenated vegetable oil?

Ovalbumin, the egg white protein is denatured in scrambled egg. Which of the following is not affected?

Homo sapiens have 23 pairs of chromosomes. What does the number '23' represent here?

Misfolding of polypeptides is a serious problem in cells. Which of the following diseases are associated with an accumulation of misfolded polypeptides?

Biology and Its Themes

Atoms and Molecules

The Chemistry of Water

Carbon: the Basis of Molecular Diversity

Energy and Life

Cell Structure and Function

Cell Membranes

Cellular Signaling

Cell Respiration

Photosynthetic Processes

Mitosis

Sexual Life Cycles and Meiosis

Mendelian Genetics

Linkage and Chromosomes

Nucleic Acids and Inheritance

Expression of Genes

Control of Gene Expression

Dna Technology

The Evolution of Genomes

How Evolution Works

Phylogenetic Reconstruction

Microevolution

Species and Speciation

Macroevolution

Introduction to Viruses

Prokaryotes

The Origin and Evolution of Eukaryotes

Nonvascular and Seedless Vascular Plants

Seed Plants

Introduction to Fungi

An Introduction to Animal Diversity

Invertebrates

Vertebrates

Plant Structure and Growth

Transport in Vascular Plants

Plant Nutrition

Reproduction of Flowering Plants

Plant Signals and Behavior

The Animal Body

Chemical Signals in Animals

Animal Digestive Systems

Animal Transport Systems

Animal Excretory Systems

Animal Reproductive Systems

Development in Animals

Animal Defenses Against Infection

Electrical Signals in Animals

Neural Regulation in Animals

Sensation and Movement in Animals

An Overview of Ecology

Behavioral Ecology

Populations and Life History Traits

Biodiversity and Communities

Energy Flow and Chemical Cycling in Ecosystems

Conservation and Global Ecology

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