Question 1

Figure 3.5
-Which molecule shown in Figure 3.5 contains a carboxyl group?

Accepted Answer

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

Question 2

Figure 3.7
-If two of the molecules shown in Figure 3.7 are linked together,carbon-1 of one molecule to carbon-4 of the other,the bond that is formed would be found in which of the following polymers?

Accepted Answer

A) cellulose 
B) glycogen 
C) chitin 
D) polypeptide 
E) nucleic acid 
A) cellulose 
B) glycogen 
C) chitin 
D) polypeptide 
E) nucleic acid

Question 3

Figure 3.12
-At which bond in Figure 3.12 would water need to be added to achieve hydrolysis of the dipeptide resulting in production of its component amino acids?

Accepted Answer

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

Question 4

The molecular formula for glucose is C6H12O6.What would be the molecular formula for a polymer made by linking 10 glucose molecules together by dehydration reactions?

Accepted Answer

A) C60H120O60 
B) C60H102O51 
C) C60H100O50 
D) C60H111O51 
A) C60H120O60 
B) C60H102O51 
C) C60H100O50 
D) C60H111O51

Question 5

A nutritional supplement developed for athletes is shown to contain only carbon,hydrogen,and oxygen.Based on these data,you may safely conclude that

Accepted Answer

A) the food may contain carbohydrates and protein. 
B) the food may contain carbohydrates and nucleic acids. 
C) the food may contain lipids and protein. 
D) the food may contain carbohydrates and lipids but not protein. 
A) the food may contain carbohydrates and protein. 
B) the food may contain carbohydrates and nucleic acids. 
C) the food may contain lipids and protein. 
D) the food may contain carbohydrates and lipids but not protein.

Question 6

If cells are grown in a medium containing radioactive 32P,which of these molecules will be radioactively labeled?

Accepted Answer

A) triacylglycerols 
B) nucleic acids 
C) fatty acids 
D) starch 
A) triacylglycerols 
B) nucleic acids 
C) fatty acids 
D) starch

Question 7

When two carbon atoms are joined by a double bond,the carbons and atoms bound to them form which of the following structures?

Accepted Answer

A) sphere 
B) cube 
C) tetrahedron 
D) line 
E) plane. 
A) sphere 
B) cube 
C) tetrahedron 
D) line 
E) plane.

Question 8

Which of the following polymers lacks nitrogen?

Accepted Answer

A) protein 
B) RNA 
C) glycogen 
D) chitin 
A) protein 
B) RNA 
C) glycogen 
D) chitin

Question 9

How many electron pairs does carbon share in order to complete its valence shell?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 8 
A) 1 
B) 2 
C) 3 
D) 4 
E) 8

Question 10

A carbon atom is most likely to form which of the following bonds with other atoms?

Accepted Answer

A) ionic bonds 
B) hydrogen bonds 
C) covalent bonds 
D) covalent bonds and hydrogen bonds 
A) ionic bonds 
B) hydrogen bonds 
C) covalent bonds 
D) covalent bonds and hydrogen bonds

Question 11

Figure 3.6
-Which molecule shown in Figure 3.6 can form a covalent bond between side chains (R groups)in a polypeptide?

Accepted Answer

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

Question 12

Figure 3.4
-Which of the groups in Figure 3.4 is a basic functional group that can accept H+ ions and become positively charged?

Accepted Answer

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

Question 13

The α helix and β pleated sheet are examples of which level of protein structure?

Accepted Answer

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

Question 14

Which of the following will be most soluble in water?

Accepted Answer

A) organic hydrocarbons 
B) organic hydrocarbons with hydroxyl groups attached 
C) organic hydrocarbons with sulfhydryl groups attached 
D) organic hydrocarbons with methyl groups attached 
A) organic hydrocarbons 
B) organic hydrocarbons with hydroxyl groups attached 
C) organic hydrocarbons with sulfhydryl groups attached 
D) organic hydrocarbons with methyl groups attached

Question 15

Figure 3.3
-Which of the structures illustrated in Figure 3.3 contain(s)only nonpolar single covalent bonds?

Accepted Answer

A) A only 
B) B only 
C) B and C 
D) B and D 
E) B and E 
A) A only 
B) B only 
C) B and C 
D) B and D 
E) B and E

Question 16

Figure 3.11
Which of the following statements regarding the chemical reaction illustrated in Figure 3.11 is true?

Accepted Answer

A) It is a hydrolysis reaction. 
B) It results in a peptide bond. 
C) It forms a disaccharide. 
D) It forms two amino acids. 
A) It is a hydrolysis reaction. 
B) It results in a peptide bond. 
C) It forms a disaccharide. 
D) It forms two amino acids.

Question 17

Bonds formed between the side chains (R groups)in a polypeptide are most important in stabilizing which of the following?

Accepted Answer

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

Question 18

Figure 3.9
-Which of the following statements regarding the molecule illustrated in Figure 3.9 is true?

Accepted Answer

A) It is a saturated fatty acid. 
B) It is an entirely nonpolar molecule. 
C) Molecules of this type are usually liquid at room temperature. 
D) It is highly soluble in water. 
A) It is a saturated fatty acid. 
B) It is an entirely nonpolar molecule. 
C) Molecules of this type are usually liquid at room temperature. 
D) It is highly soluble in water.

Question 19

Which of the following statements concerning unsaturated fats is true?

Accepted Answer

A) They are more common in animals than in plants. 
B) They have double bonds in their fatty acid chains. 
C) They generally solidify at room temperature. 
D) They contain more hydrogen than do saturated fats having the same number of carbon atoms. 
A) They are more common in animals than in plants. 
B) They have double bonds in their fatty acid chains. 
C) They generally solidify at room temperature. 
D) They contain more hydrogen than do saturated fats having the same number of carbon atoms.

Question 20

Which of the following classes of biological molecules consist of both small molecule monomers and macromolecular polymers?

Accepted Answer

A) lipids 
B) carbohydrates 
C) proteins 
D) nucleic acids 
A) lipids 
B) carbohydrates 
C) proteins 
D) nucleic acids

Exam 3: Carbon and the Molecular Diversity of Life

Figure 3.5 -Which molecule shown in Figure 3.5 contains a carboxyl group?

Figure 3.7 -If two of the molecules shown in Figure 3.7 are linked together,carbon-1 of one molecule to carbon-4 of the other,the bond that is formed would be found in which of the following polymers?

Figure 3.12 -At which bond in Figure 3.12 would water need to be added to achieve hydrolysis of the dipeptide resulting in production of its component amino acids?

The molecular formula for glucose is C6H12O6.What would be the molecular formula for a polymer made by linking 10 glucose molecules together by dehydration reactions?

A nutritional supplement developed for athletes is shown to contain only carbon,hydrogen,and oxygen.Based on these data,you may safely conclude that

If cells are grown in a medium containing radioactive 32P,which of these molecules will be radioactively labeled?

When two carbon atoms are joined by a double bond,the carbons and atoms bound to them form which of the following structures?

Which of the following polymers lacks nitrogen?

How many electron pairs does carbon share in order to complete its valence shell?

A carbon atom is most likely to form which of the following bonds with other atoms?

Figure 3.6 -Which molecule shown in Figure 3.6 can form a covalent bond between side chains (R groups)in a polypeptide?

Figure 3.4 -Which of the groups in Figure 3.4 is a basic functional group that can accept H+ ions and become positively charged?

The α helix and β pleated sheet are examples of which level of protein structure?

Which of the following will be most soluble in water?

Figure 3.3 -Which of the structures illustrated in Figure 3.3 contain(s)only nonpolar single covalent bonds?

Figure 3.11 Which of the following statements regarding the chemical reaction illustrated in Figure 3.11 is true?

Bonds formed between the side chains (R groups)in a polypeptide are most important in stabilizing which of the following?

Figure 3.9 -Which of the following statements regarding the molecule illustrated in Figure 3.9 is true?

Which of the following statements concerning unsaturated fats is true?

Which of the following classes of biological molecules consist of both small molecule monomers and macromolecular polymers?

Introduction: Evolution and the Foundations of Biology

The Chemical Context of Life

A Tour of the Cell

Membrane Transport and Cell Signaling

An Introduction to Metabolism

Cellular Respiration and Fermentation

Photosynthesis

The Cell Cycle

Meiosis and Sexual Life Cycles

Mendel and the Gene Idea

The Chromosomal Basis of Inheritance

The Molecular Basis of Inheritance

Gene Expression: From Gene to Protein

Regulation of Gene Expression

Development,stem Cells,and Cancer

Viruses

Genomes and Their Evolution

Descent With Modification

Phylogeny

The Evolution of Populations

The Origin of Species

Broad Patterns of Evolution

Early Life and the Diversification of Prokaryotes

The Origin and Diversification of Eukaryotes

The Colonization of Land by Plants and Fungi

The Rise of Animal Diversity

Plant Structure and Growth

Resource Acquisition,nutrition,and Transport in Vascular Plants

Reproduction and Domestication of Flowering Plants

Plant Responses to Internal and External Signals

Homeostasis and Endocrine Signaling

Animal Nutrition

Circulation and Gas Exchange

The Immune System

Reproduction and Development

Neurons,synapses,and Signaling

Nervous and Sensory Systems

Motor Mechanisms and Behavior

Population Ecology and the Distribution of Organisms

Ecological Communities

Ecosystems and Energy

Conservation Biology and Global Change

Filters

The molecular formula for glucose is C₆H₁₂O₆.What would be the molecular formula for a polymer made by linking 10 glucose molecules together by dehydration reactions?

If cells are grown in a medium containing radioactive ³²P,which of these molecules will be radioactively labeled?

Figure 3.4 -Which of the groups in Figure 3.4 is a basic functional group that can accept H⁺ ions and become positively charged?