Question 1

If cells are grown in a medium containing radioactive ³²P-labelled phosphate,which of these molecules will be labelled?

Accepted Answer

A) phospholipids 
B) nucleic acids 
C) proteins 
D) amylose 
E) both phospholipids and nucleic acids 
A) phospholipids 
B) nucleic acids 
C) proteins 
D) amylose 
E) both phospholipids and nucleic acids E

Question 2

Which of these molecules is not formed by dehydration reactions?

Accepted Answer

A) fatty acids 
B) disaccharides 
C) DNA 
D) protein 
E) amylose 
A) fatty acids 
B) disaccharides 
C) DNA 
D) protein 
E) amylose A

Question 3

Use the following information to answer the questions below.
You have just had a breakfast of toast (high-fibre bread)with butter and jam (no added sugar)along with a glass of milk.
-What are the two major polysaccharides you have consumed?

Accepted Answer

A) fatty acids and pectin 
B) cellulose and fructose 
C) starch and fructose 
D) glucose and fructose 
E) cellulose and starch 
A) fatty acids and pectin 
B) cellulose and fructose 
C) starch and fructose 
D) glucose and fructose 
E) cellulose and starch E

Question 4

Which of the following statements concerning saturated fats is not true?

Accepted Answer

A) They are more common in animals than in plants. 
B) They have multiple double bonds in the carbon chains of their fatty acids. 
C) They generally solidify at room temperature. 
D) They contain more hydrogen than unsaturated fats having the same number of carbon atoms. 
E) They are one of several factors that contribute to atherosclerosis. 
A) They are more common in animals than in plants. 
B) They have multiple double bonds in the carbon chains of their fatty acids. 
C) They generally solidify at room temperature. 
D) They contain more hydrogen than unsaturated fats having the same number of carbon atoms. 
E) They are one of several factors that contribute to atherosclerosis.

Question 5

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

Accepted Answer

A) glycogen 
B) cellulose 
C) chitin 
D) glycogen and chitin only 
E) glycogen, cellulose, and chitin 
A) glycogen 
B) cellulose 
C) chitin 
D) glycogen and chitin only 
E) glycogen, cellulose, and chitin

Question 6

Nucleic acids are polymers made up of which of the following monomers?

Accepted Answer

A) nucleotides 
B) sugars 
C) amino acids 
D) nitrogenous bases 
E) deoxyribose 
A) nucleotides 
B) sugars 
C) amino acids 
D) nitrogenous bases 
E) deoxyribose

Question 7

How will brief heating (to 95°C)affect macromolecular structures in aqueous solution?

Accepted Answer

A) DNA duplexes will unwind and separate. 
B) Proteins will unfold (denature). 
C) Starch will hydrolyze into monomeric sugars. 
D) Proteins will hydrolyze into amino acids. 
E) DNA duplexes will unwind and separate, and proteins will unfold (denature). 
A) DNA duplexes will unwind and separate. 
B) Proteins will unfold (denature). 
C) Starch will hydrolyze into monomeric sugars. 
D) Proteins will hydrolyze into amino acids. 
E) DNA duplexes will unwind and separate, and proteins will unfold (denature).

Question 8

Use the following information to answer the questions below.
You have just had a breakfast of toast (high-fibre bread)with butter and jam (no added sugar)along with a glass of milk.
-Of these two,which one will not be hydrolyzed in your digestive tract?

Accepted Answer

A) fatty acids 
B) cellulose 
C) starch 
D) glucose 
E) fructose 
A) fatty acids 
B) cellulose 
C) starch 
D) glucose 
E) fructose

Question 9

The molecular formula for glucose is C₆H₁₂O₆.What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?

Accepted Answer

A) C₁₈H₃₆O₁₈ 
B) C₁₈H₃₂O₁₆ 
C) C₆H₁₀O₅ 
D) C₁₈H₁₀O₁₅ 
E) C₃H₆O₃ 
A) C₁₈H₃₆O₁₈ 
B) C₁₈H₃₂O₁₆ 
C) C₆H₁₀O₅ 
D) C₁₈H₁₀O₁₅ 
E) C₃H₆O₃

Question 10

Use the following figure to answer the questions below.
  
-If two molecules of the general type shown in the above figure were linked together,carbon-1 of one molecule to carbon-4 of the other,the single molecule that would result would be

Accepted Answer

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

Question 11

The R group or side chain of the amino acid serine is -CH₂-OH.The R group or side chain of the amino acid leucine is -CH₂-CH-(CH₃₎₂.Where would you expect to find these amino acids in a globular protein in aqueous solution?

Accepted Answer

A) Serine would be in the interior, and leucine would be on the exterior of the globular protein. 
B) Leucine would be in the interior, and serine would be on the exterior of the globular protein. 
C) Both serine and leucine would be in the interior of the globular protein. 
D) Both serine and leucine would be on the exterior of the globular protein. 
E) Both serine and leucine would be in the interior and on the exterior of the globular protein. 
A) Serine would be in the interior, and leucine would be on the exterior of the globular protein. 
B) Leucine would be in the interior, and serine would be on the exterior of the globular protein. 
C) Both serine and leucine would be in the interior of the globular protein. 
D) Both serine and leucine would be on the exterior of the globular protein. 
E) Both serine and leucine would be in the interior and on the exterior of the globular protein.

Question 12

Which modifications of fatty acids will best keep triglycerides solid at warmer temperatures?

Accepted Answer

A) creating cis double bonds to the fatty acids 
B) adding hydrogens to the fatty acids 
C) creating trans double bonds to the fatty acids 
D) adding hydrogens or trans double bonds to the fatty acids 
E) adding cis double bonds and trans double bonds to the fatty acids 
A) creating cis double bonds to the fatty acids 
B) adding hydrogens to the fatty acids 
C) creating trans double bonds to the fatty acids 
D) adding hydrogens or trans double bonds to the fatty acids 
E) adding cis double bonds and trans double bonds to the fatty acids

Question 13

How do phospholipids interact with water molecules?

Accepted Answer

A) The polar heads avoid water, and the nonpolar tails attract water. 
B) Phospholipids do not interact with water because water is polar and lipids are nonpolar. 
C) The polar heads interact with water, and the nonpolar tails do not. 
D) The hydrocarbon tails form hydrogen bonds with water. 
E) Both the polar head and lipid backbone from hydrogen bonds with water. 
A) The polar heads avoid water, and the nonpolar tails attract water. 
B) Phospholipids do not interact with water because water is polar and lipids are nonpolar. 
C) The polar heads interact with water, and the nonpolar tails do not. 
D) The hydrocarbon tails form hydrogen bonds with water. 
E) Both the polar head and lipid backbone from hydrogen bonds with water.

Question 14

What happens when nucleotides polymerize to form a nucleic acid?

Accepted Answer

A) A covalent bond forms between the sugar of one nucleotide and the phosphate of a second nucleotide. 
B) A hydrogen bond forms between the sugar of one nucleotide and the phosphate of a second nucleotide. 
C) Covalent bonds form between the bases of two nucleotides. 
D) Hydrogen bonds form between the bases of two nucleotides. 
E) A covalent bond forms between the sugar of one nucleotide and the base of a second nucleotide. 
A) A covalent bond forms between the sugar of one nucleotide and the phosphate of a second nucleotide. 
B) A hydrogen bond forms between the sugar of one nucleotide and the phosphate of a second nucleotide. 
C) Covalent bonds form between the bases of two nucleotides. 
D) Hydrogen bonds form between the bases of two nucleotides. 
E) A covalent bond forms between the sugar of one nucleotide and the base of a second nucleotide.

Question 15

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all.
  
-Which of the following molecules act as building blocks (monomers)of polypeptides?

Accepted Answer

A) 1, 4, and 6 
B) 2, 7, and 8 
C) 7, 8, and 13 
D) 11, 12, and 13 
E) 12, 13, and 15 
A) 1, 4, and 6 
B) 2, 7, and 8 
C) 7, 8, and 13 
D) 11, 12, and 13 
E) 12, 13, and 15

Question 16

All of the following are polysaccharides except

Accepted Answer

A) lactose. 
B) glycogen. 
C) chitin. 
D) cellulose. 
E) amylopectin. 
A) lactose. 
B) glycogen. 
C) chitin. 
D) cellulose. 
E) amylopectin.

Question 17

Which of the following techniques uses the amino acid sequences of polypeptides to predict a protein's three-dimensional structure?

Accepted Answer

A) X-ray crystallography 
B) bioinformatics 
C) analysis of amino acid sequence of small fragments 
D) NMR spectroscopy 
E) high-speed centrifugation 
A) X-ray crystallography 
B) bioinformatics 
C) analysis of amino acid sequence of small fragments 
D) NMR spectroscopy 
E) high-speed centrifugation

Question 18

Refer to the following figure to answer the questions below.
  
-Which bond is a peptide bond?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
E) E 
A) A 
B) B 
C) C 
D) D 
E) E

Question 19

Dehydration reactions are used in forming which of the following compounds?

Accepted Answer

A) triacylglycerides 
B) polysaccharides 
C) proteins 
D) triacylglycerides and proteins only 
E) triacylglycerides, polysaccharides, and proteins 
A) triacylglycerides 
B) polysaccharides 
C) proteins 
D) triacylglycerides and proteins only 
E) triacylglycerides, polysaccharides, and proteins

Question 20

The structural level of a protein least affected by a disruption in hydrogen bonding is the

Accepted Answer

A) primary level. 
B) secondary level. 
C) tertiary level. 
D) quaternary level. 
E) All structural levels are equally affected. 
A) primary level. 
B) secondary level. 
C) tertiary level. 
D) quaternary level. 
E) All structural levels are equally affected.

Exam 5: The Structure and Function of Large Biological Molecules

If cells are grown in a medium containing radioactive ³²P-labelled phosphate,which of these molecules will be labelled?

Which of these molecules is not formed by dehydration reactions?

Use the following information to answer the questions below. You have just had a breakfast of toast (high-fibre bread)with butter and jam (no added sugar)along with a glass of milk. -What are the two major polysaccharides you have consumed?

Which of the following statements concerning saturated fats is not true?

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

Nucleic acids are polymers made up of which of the following monomers?

How will brief heating (to 95°C)affect macromolecular structures in aqueous solution?

Use the following information to answer the questions below. You have just had a breakfast of toast (high-fibre bread)with butter and jam (no added sugar)along with a glass of milk. -Of these two,which one will not be hydrolyzed in your digestive tract?

The molecular formula for glucose is C₆H₁₂O₆.What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?

Use the following figure to answer the questions below. -If two molecules of the general type shown in the above figure were linked together,carbon-1 of one molecule to carbon-4 of the other,the single molecule that would result would be

The R group or side chain of the amino acid serine is -CH₂-OH.The R group or side chain of the amino acid leucine is -CH₂-CH-(CH₃₎₂.Where would you expect to find these amino acids in a globular protein in aqueous solution?

Which modifications of fatty acids will best keep triglycerides solid at warmer temperatures?

How do phospholipids interact with water molecules?

What happens when nucleotides polymerize to form a nucleic acid?

The following questions are based on the 15 molecules illustrated in the figure below.Each molecule may be used once,more than once,or not at all. -Which of the following molecules act as building blocks (monomers)of polypeptides?

All of the following are polysaccharides except

Which of the following techniques uses the amino acid sequences of polypeptides to predict a protein's three-dimensional structure?

Refer to the following figure to answer the questions below. -Which bond is a peptide bond?

Dehydration reactions are used in forming which of the following compounds?

The structural level of a protein least affected by a disruption in hydrogen bonding is the

Introduction: Evolution and Themes of Biology

The Chemical Context of Life

Water and Life

Carbon and the Molecular Diversity of Life

A Tour of the Cell

Membrane Structure and Function

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

Cell Communication

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

From Gene to Protein

Regulation of Gene Expression

Viruses

DNA Tools and Biotechnology

Genomes and Their Evolution

Descent with Modification: A Darwinian View of Life

The Evolution of Populations

The Origin of Species

The History of Life on Earth

Phylogeny and the Tree of Life

Bacteria and Archaea

Protists

Plant Diversity I: How Plants Colonized Land

Plant Diversity II: The Evolution of Seed Plants

Fungi

An Overview of Animal Diversity

An Introduction to Invertebrates

The Origin and Evolution of Vertebrates

Plant Structure,Growth,and Development

Resource Acquisition and Transport in Vascular Plants

Soil and Plant Nutrition

Angiosperm Reproduction and Biotechnology

Plant Responses to Internal and External Signals

Basic Principles of Animal Form and Function

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Osmoregulation and Excretion

Hormones and the Endocrine System

Animal Reproduction

Animal Development

Neurons,Synapses,and Signalling

Nervous Systems

Sensory and Motor Mechanisms

Animal Behaviour

An Introduction to Ecology and the Biosphere

Population Ecology

Community Ecology

Ecosystems and Restoration Ecology

Conservation Biology and Global Change

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