Question 1

Because of their structure,trans fats resemble ________ fatty acids in shape and are produced artificially during the manufacture of shortening and margarine.

Accepted Answer

The answer of Because of their structure,trans fats resemble ________...

Question 2

Cellulose is a polymer of ________,a common monosaccharide.

Accepted Answer

The answer of Cellulose is a polymer of ________,a common...

Question 3

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

Accepted Answer

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

Question 4

________ are small oligonucleotides,20-30 nucleotides in length,that bind specifically to mRNA and facilitate the destruction of the mRNA.

Accepted Answer

Silencing

Question 5

Which of the following is most similar to the Watson-Crick helix?

Accepted Answer

A) B-DNA 
B) C-DNA 
C) A-DNA 
D) mRNA 
E) Z-DNA 
A) B-DNA 
B) C-DNA 
C) A-DNA 
D) mRNA 
E) Z-DNA

Question 6

Which of the following is not correctly matched?

Accepted Answer

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

Question 7

Disulfide bonds are often found to stabilize which of the following levels of protein structure?

Accepted Answer

A) primary 
B) secondary 
C) tertiary 
D) all of the above 
E) none of the above 
A) primary 
B) secondary 
C) tertiary 
D) all of the above 
E) none of the above

Question 8

Which of the following is not a base used in DNA replication?

Accepted Answer

A) thymine 
B) guanine 
C) uracil 
D) adenine 
E) cytosine 
A) thymine 
B) guanine 
C) uracil 
D) adenine 
E) cytosine

Question 9

Triglycerides are composed of three fatty acids attached to a molecule of ________.

Accepted Answer

The answer of Triglycerides are composed of three fatty acids...

Question 10

Which of the following is not a characteristic of DNA?

Accepted Answer

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

Question 11

Which of the following is not true of phospholipids?

Accepted Answer

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

Question 12

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

Accepted Answer

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

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

Question 14

Which of the following is true of purines?

Accepted Answer

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

Question 15

Which of the following does not represent the correct pairing of the three-letter abbreviation with the one-letter abbreviation of an amino acid?

Accepted Answer

A) pro-P 
B) met-M 
C) glu-E 
D) phe-F 
E) arg-A 
A) pro-P 
B) met-M 
C) glu-E 
D) phe-F 
E) arg-A

Question 16

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

Accepted Answer

amylose; a

Question 17

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

Accepted Answer

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

Question 18

________ and ________ are the two kinds of sugars found in bacterial cell walls.

Accepted Answer

N-acetylglucosamine

Question 19

Which of the following is a purine?

Accepted Answer

A) guanine 
B) cytosine 
C) thymine 
D) uracil 
E) cysteine 
A) guanine 
B) cytosine 
C) thymine 
D) uracil 
E) cysteine

Question 20

Lipid rafts are

Accepted Answer

A) regions of the membrane that are high in sphingolipids, which facilitate communication with the external environment of the cell. 
B) important regions of membrane structure and are comprised of phospholipids. 
C) regions not typically associated with signal transduction. 
D) regions where greater concentrations of sphingolipids are on the inner side of the membrane. 
E) great for white-water rafting. 
A) regions of the membrane that are high in sphingolipids, which facilitate communication with the external environment of the cell. 
B) important regions of membrane structure and are comprised of phospholipids. 
C) regions not typically associated with signal transduction. 
D) regions where greater concentrations of sphingolipids are on the inner side of the membrane. 
E) great for white-water rafting.

Exam 3: The Macromolecules of the Cell

Because of their structure,trans fats resemble ________ fatty acids in shape and are produced artificially during the manufacture of shortening and margarine.

Cellulose is a polymer of ________,a common monosaccharide.

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

________ are small oligonucleotides,20-30 nucleotides in length,that bind specifically to mRNA and facilitate the destruction of the mRNA.

Which of the following is most similar to the Watson-Crick helix?

Which of the following is not correctly matched?

Disulfide bonds are often found to stabilize which of the following levels of protein structure?

Which of the following is not a base used in DNA replication?

Triglycerides are composed of three fatty acids attached to a molecule of ________.

Which of the following is not a characteristic of DNA?

Which of the following is not true of phospholipids?

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

Which of the following is true of glycolipids?

Which of the following is true of purines?

Which of the following does not represent the correct pairing of the three-letter abbreviation with the one-letter abbreviation of an amino acid?

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

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

________ and ________ are the two kinds of sugars found in bacterial cell walls.

Which of the following is a purine?

Lipid rafts are

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: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

Cytoskeletal Systems

Cellular Movement: Motility and Contractility

Beyond the Cell: Cell Adhesions, 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: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Cancer Cells

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

and are the two kinds of sugars found in bacterial cell walls.