Question 1

Which of the following amino acids is a nonpolar (hydrophobic)amino acid?

Accepted Answer

A) tyrosine 
B) aspartate 
C) serine 
D) lysine 
E) valine 
A) tyrosine 
B) aspartate 
C) serine 
D) lysine 
E) valine E

Question 2

Which of the following is NOT a characteristic of DNA?

Accepted Answer

A) antiparallel 
B) double- stranded 
C) complementary 
D) contains ribose 
E) composed of nucleotides 
A) antiparallel 
B) double- stranded 
C) complementary 
D) contains ribose 
E) composed of nucleotides D

Question 3

Which of the following is true of fatty acids?

Accepted Answer

A) Fatty acids are synthesized by the stepwise addition of three carbon units. 
B) Saturated fatty acids have no double bonds between carbons. 
C) Unsaturated fatty acids are usually branched. 
D) Laurate is an unsaturated fatty acid. 
E) Fatty acids with 24 carbons are most common. 
A) Fatty acids are synthesized by the stepwise addition of three carbon units. 
B) Saturated fatty acids have no double bonds between carbons. 
C) Unsaturated fatty acids are usually branched. 
D) Laurate is an unsaturated fatty acid. 
E) Fatty acids with 24 carbons are most common. B

Question 4

Which of the following is a terpene?

Accepted Answer

A) testosterone 
B) dolichol 
C) glycerol 
D) phenanthrene 
E) vitamin A 
A) testosterone 
B) dolichol 
C) glycerol 
D) phenanthrene 
E) vitamin A

Question 5

The primary structure of a protein

Accepted Answer

A) is important for determining the secondary and tertiary structure of a protein. 
B) is important both genetically and structurally. 
C) is the linear sequence of amino acids that are linked together by peptide bonds. 
D) is simply the order of amino acids from one end of the protein to another. 
E) all of the above 
A) is important for determining the secondary and tertiary structure of a protein. 
B) is important both genetically and structurally. 
C) is the linear sequence of amino acids that are linked together by peptide bonds. 
D) is simply the order of amino acids from one end of the protein to another. 
E) all of the above

Question 6

Which of the following is a disaccharide?

Accepted Answer

A) lactose 
B) fructose 
C) galactose 
D) glucose 
E) amylose 
A) lactose 
B) fructose 
C) galactose 
D) glucose 
E) amylose

Question 7

Which of the following is true of purines?

Accepted Answer

A) Adenine's bonding to thymine is stronger than is guanine's to cytosine. 
B) Cytosine is a purine. 
C) Purines have a double- ringed structure. 
D) Purines bind readily to deoxyribose, but not ribose. 
E) Both adenine and thymine are purines. 
A) Adenine's bonding to thymine is stronger than is guanine's to cytosine. 
B) Cytosine is a purine. 
C) Purines have a double- ringed structure. 
D) Purines bind readily to deoxyribose, but not ribose. 
E) Both adenine and thymine are purines.

Question 8

Which of the following is true of transfer RNA?

Accepted Answer

A) It is an important component of ribosomes. 
B) It serves as the site of protein synthesis. 
C) It is responsible for correct positioning of amino acids in a polypeptide. 
D) It functions in replication only. 
E) It is responsible for the correct positioning of amino acids in a nascent polypeptide. 
A) It is an important component of ribosomes. 
B) It serves as the site of protein synthesis. 
C) It is responsible for correct positioning of amino acids in a polypeptide. 
D) It functions in replication only. 
E) It is responsible for the correct positioning of amino acids in a nascent polypeptide.

Question 9

Based on the following amino acid sequence, which region(s)is/are hydrophobic? 1[K- K- N- Q] - 2[A- G- G- V] - 3[Y- C- S- R] - 4[H- E- C- Y]

Accepted Answer

A) region 2 
B) region 4 
C) region 1 
D) region 3 
E) Both regions 1 and 3 
A) region 2 
B) region 4 
C) region 1 
D) region 3 
E) Both regions 1 and 3

Question 10

Structurally, starch exists as both unbranched polysaccharide chains called and branched polysaccharide chains called .

Accepted Answer

amylose; a

Question 11

Which of the following is NOT true of phospholipids?

Accepted Answer

A) Phospholipids are important in membrane structure. 
B) Phosphatidic acid contains two fatty acids and a phosphate group. 
C) Serine is a molecule that may be part of a phosphoglyceride. 
D) Sphingolipids are the predominant phospholipid in membranes. 
E) Phospholipids are amphipathic. 
A) Phospholipids are important in membrane structure. 
B) Phosphatidic acid contains two fatty acids and a phosphate group. 
C) Serine is a molecule that may be part of a phosphoglyceride. 
D) Sphingolipids are the predominant phospholipid in membranes. 
E) Phospholipids are amphipathic.

Question 12

Which of the following is NOT a major functional class of proteins?

Accepted Answer

A) structural 
B) regulatory 
C) enzymes 
D) trifunctional 
E) motility 
A) structural 
B) regulatory 
C) enzymes 
D) trifunctional 
E) motility

Question 13

Which of the following is true of glycolipids?

Accepted Answer

A) Glycolipids are usually found on the exterior surface of the plasma membrane. 
B) Usually more than 10 sugar units are attached to the glycolipid. 
C) Laurate is a glycolipid. 
D) Fructose and sucrose are often part of glycolipids. 
E) Glycolipids contain phosphatidic acid. 
A) Glycolipids are usually found on the exterior surface of the plasma membrane. 
B) Usually more than 10 sugar units are attached to the glycolipid. 
C) Laurate is a glycolipid. 
D) Fructose and sucrose are often part of glycolipids. 
E) Glycolipids contain phosphatidic acid.

Question 14

Hydrogen bonding is most important in stabilizing the structure of many proteins.

Accepted Answer

A) tertiary 
B) quaternary 
C) primary 
D) secondary 
E) all of the above 
A) tertiary 
B) quaternary 
C) primary 
D) secondary 
E) all of the above

Question 15

Which of the following is an example of a defensive protein?

Accepted Answer

A) cell surface receptor 
B) keratin 
C) antibody 
D) hormone 
E) myosin 
A) cell surface receptor 
B) keratin 
C) antibody 
D) hormone 
E) myosin

Question 16

Which of the following is NOT one of the six classes of lipids?

Accepted Answer

A) steroids 
B) fatty acids 
C) terpenes 
D) pectins 
E) triacylglycerols 
A) steroids 
B) fatty acids 
C) terpenes 
D) pectins 
E) triacylglycerols

Question 17

Which of the following is NOT a polymer of numerous monomer units?

Accepted Answer

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

Question 18

The level of protein structure that is even higher than quaternary structure is

Accepted Answer

A) the linear sequence of amino acids. 
B) subunit interactions and assembly. 
C) hydrogen bond formation. 
D) enzyme complex formation. 
E) R- group interactions. 
A) the linear sequence of amino acids. 
B) subunit interactions and assembly. 
C) hydrogen bond formation. 
D) enzyme complex formation. 
E) R- group interactions.

Question 19

Which of the following has the greatest number of glycosidic bonds?

Accepted Answer

A) glucose 
B) DNA 
C) amylose 
D) vitamin A 
E) triacylglycerol 
A) glucose 
B) DNA 
C) amylose 
D) vitamin A 
E) triacylglycerol

Question 20

Which of the following is NOT correctly matched?

Accepted Answer

A) enzymatic protein - collagen 
B) hormonal protein - insulin 
C) storage protein - seed proteins 
D) defense protein - antibody 
E) motility proteins - actin and myosin 
A) enzymatic protein - collagen 
B) hormonal protein - insulin 
C) storage protein - seed proteins 
D) defense protein - antibody 
E) motility proteins - actin and myosin

Exam 3: The Macromolecules of the Cell

Which of the following amino acids is a nonpolar (hydrophobic)amino acid?

Which of the following is NOT a characteristic of DNA?

Which of the following is true of fatty acids?

Which of the following is a terpene?

The primary structure of a protein

Which of the following is a disaccharide?

Which of the following is true of purines?

Which of the following is true of transfer RNA?

Based on the following amino acid sequence, which region(s)is/are hydrophobic? 1[K- K- N- Q] - 2[A- G- G- V] - 3[Y- C- S- R] - 4[H- E- C- Y]

Structurally, starch exists as both unbranched polysaccharide chains called and branched polysaccharide chains called .

Which of the following is NOT true of phospholipids?

Which of the following is NOT a major functional class of proteins?

Which of the following is true of glycolipids?

Hydrogen bonding is most important in stabilizing the structure of many proteins.

Which of the following is an example of a defensive protein?

Which of the following is NOT one of the six classes of lipids?

Which of the following is NOT a polymer of numerous monomer units?

The level of protein structure that is even higher than quaternary structure is

Which of the following has the greatest number of glycosidic bonds?

Which of the following is NOT correctly matched?

A Preview of the Cell

The Chemistry of the Cell

Cells and Organelles

Bioenergetics: The Flow of Energy in the Cell

Enzymes: The Catalysts of Life

Membranes: Their Structure, Function, and Chemistry

Transport Across Membranes: Overcoming the Permeability Barrier

Chemotrophic Energy Metabolism: Glycolysis and Fermentation

Chemotrophic Energy Metabolism: Aerobic Respiration

Phototrophic Energy Metabolism: Photosynthesis

The Endomembrane System and Peroxisomes

Signal Transduction Mechanisms: I Electrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Ii Messengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesion, Cell Junctions, and Extracellular Structures

The Structural Basis of Cellular Information: DNA, Chromosomes, and the Nucleus

The Cell Cycle, Dna Replication, and Mitosis

Sexual Reproduction, Meiosis, and Genetic Recombination

Gene Expression: I the Genetic Code and Transcription

Gene Expression: II Protein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

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