Question 1

Which of the following is a unit of energy?

Accepted Answer

A) calorie 
B) bond 
C) watt 
D) mole 
E) both A and B 
A) calorie 
B) bond 
C) watt 
D) mole 
E) both A and B

Question 2

TMV,or ________,is a rodlike particle with a genome of ________ and a ________ consisting of 2130 copies of a single polypeptide.

Accepted Answer

tobacco mo

Question 3

While fishing,you make the following observations: 
A.Water spiders appear to be able walk on the surface of the water. 
B.Flat rocks may be made to skip across the water.
Which of the following properties of water can explain these observations?

Accepted Answer

A) Water is an excellent solvent. 
B) Water molecules are heavy. 
C) Water molecules are cohesive. 
D) Water molecules are polar. 
E) Both B and C 
A) Water is an excellent solvent. 
B) Water molecules are heavy. 
C) Water molecules are cohesive. 
D) Water molecules are polar. 
E) Both B and C

Question 4

Which of the following macromolecules is insoluble in water?

Accepted Answer

A) lipids 
B) sugars 
C) amino acids 
D) disaccharides 
E) nucleic acids 
A) lipids 
B) sugars 
C) amino acids 
D) disaccharides 
E) nucleic acids

Question 5

Which of the following is an informational macromolecule?

Accepted Answer

A) DNA 
B) ATP 
C) starch 
D) glycogen 
E) polypeptide 
A) DNA 
B) ATP 
C) starch 
D) glycogen 
E) polypeptide

Question 6

An enzyme synthesized in the laboratory is found to have little activity when compared to the enzyme extracted from cell culture.Both enzymes were examined and have identical amino acid composition.What is the best explanation for the lack of activity of the synthesized enzyme?

Accepted Answer

A) The van der Waals radius was altered during laboratory synthesis. 
B) The synthetic enzyme was not made of amino acids. 
C) The ATP required for self-assembly was present in the cell extract but not in the laboratory synthesis. 
D) Denaturation of the synthesized enzyme was not complete. 
E) The synthesized enzyme was not folded correctly because molecular chaperones were not present. 
A) The van der Waals radius was altered during laboratory synthesis. 
B) The synthetic enzyme was not made of amino acids. 
C) The ATP required for self-assembly was present in the cell extract but not in the laboratory synthesis. 
D) Denaturation of the synthesized enzyme was not complete. 
E) The synthesized enzyme was not folded correctly because molecular chaperones were not present.

Question 7

Polymers are synthesized by ________ reactions and broken down into their constituent monomers by ________ reactions.

Accepted Answer

condensati

Question 8

Carbon can form ________ covalent bonds.

Accepted Answer

A) single 
B) double 
C) triple 
D) single and double 
E) single,double,and triple 
A) single 
B) double 
C) triple 
D) single and double 
E) single,double,and triple

Question 9

Ribose has five carbon atoms,of which three are asymmetric.What is the maximum number of stereoisomers that may exist for ribose?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 8 
E) 10 
A) 2 
B) 4 
C) 6 
D) 8 
E) 10

Question 10

Why do ionic substances such as NaCl dissolve so readily in water?

Accepted Answer

A) NaCl is a very dry powder,and the water is able to soak into the salt. 
B) The sodium ions repel the negative end of the water molecule. 
C) Water molecules form spheres of hydration around the sodium and chloride ions. 
D) The charged ends of the water molecules are able to surround the oppositely charged salt ion. 
E) Both C and D 
A) NaCl is a very dry powder,and the water is able to soak into the salt. 
B) The sodium ions repel the negative end of the water molecule. 
C) Water molecules form spheres of hydration around the sodium and chloride ions. 
D) The charged ends of the water molecules are able to surround the oppositely charged salt ion. 
E) Both C and D

Question 11

Detergents are best able to dissolve oil from fabric or dishes during washing because

Accepted Answer

A) the positively charged end is associated with water molecules,while the negatively charged end interacts with the oil droplet. 
B) the negatively charged end is associated with water molecules,while the positively charged end interacts with the oil droplet. 
C) the nonpolar end is associated with water molecules,while the charged end interacts with the oil droplet. 
D) the charged end is associated with water molecules,while the nonpolar end interacts with the oil droplet. 
E) detergents are nonpolar,they increase the size of the oil droplet,allowing the water to be more effective at removing the oil. 
A) the positively charged end is associated with water molecules,while the negatively charged end interacts with the oil droplet. 
B) the negatively charged end is associated with water molecules,while the positively charged end interacts with the oil droplet. 
C) the nonpolar end is associated with water molecules,while the charged end interacts with the oil droplet. 
D) the charged end is associated with water molecules,while the nonpolar end interacts with the oil droplet. 
E) detergents are nonpolar,they increase the size of the oil droplet,allowing the water to be more effective at removing the oil.

Question 12

In order to facilitate polymerization,monomers must be ________.

Accepted Answer

The answer of In order to facilitate polymerization,monomers must be...

Question 13

Which of the following is false regarding water's specific heat?

Accepted Answer

A) The specific heat of water is 1.0 calorie per gram. 
B) Heat applied to water must initially break a number of hydrogen bonds. 
C) Water's high specific heat has a temperature-buffering effect. 
D) Water gains and loses heat more slowly than most other liquids do. 
E) The specific heat of water is similar to that of most liquids. 
A) The specific heat of water is 1.0 calorie per gram. 
B) Heat applied to water must initially break a number of hydrogen bonds. 
C) Water's high specific heat has a temperature-buffering effect. 
D) Water gains and loses heat more slowly than most other liquids do. 
E) The specific heat of water is similar to that of most liquids.

Question 14

All of the following are common functional groups found in biological molecules except

Accepted Answer

A) phosphate groups. 
B) carbonyl groups. 
C) amino groups. 
D) sulfhydryl groups. 
E) butyl groups. 
A) phosphate groups. 
B) carbonyl groups. 
C) amino groups. 
D) sulfhydryl groups. 
E) butyl groups.

Question 15

What inorganic precursors are needed to synthesize proteins?

Accepted Answer

A) carbon,water,and oxygen 
B) carbon,water,oxygen,and phosphate 
C) carbon,water,oxygen,nitrogen,and phosphate 
D) carbon,water,oxygen,nitrogen,and sulfur 
E) carbon,water,oxygen,sodium,and phosphate 
A) carbon,water,and oxygen 
B) carbon,water,oxygen,and phosphate 
C) carbon,water,oxygen,nitrogen,and phosphate 
D) carbon,water,oxygen,nitrogen,and sulfur 
E) carbon,water,oxygen,sodium,and phosphate

Question 16

Describe how the amphipathic nature of phospholipids leads to the formation of the phospholipid bilayer organization observed in membrane structure.Based upon this information,how would you design a drug delivery system to cross the cell membrane?

Accepted Answer

Basically,student answers should include

Question 17

Which of the following statements about self-assembly is false?

Accepted Answer

A) The noncovalent interactions that drive supramolecular assembly processes are similar to those that dictate the folding of individual protein molecules. 
B) Self-assembly only occurs in structures composed of protein. 
C) Self-assembly requires specific chemical conditions. 
D) Molecular chaperones are sometimes required for the proper folding and assembly of complex proteins. 
E) All of the above. 
A) The noncovalent interactions that drive supramolecular assembly processes are similar to those that dictate the folding of individual protein molecules. 
B) Self-assembly only occurs in structures composed of protein. 
C) Self-assembly requires specific chemical conditions. 
D) Molecular chaperones are sometimes required for the proper folding and assembly of complex proteins. 
E) All of the above.

Exam 2: The Chemistry of the Cell

Which of the following is a unit of energy?

TMV,or ________,is a rodlike particle with a genome of ________ and a ________ consisting of 2130 copies of a single polypeptide.

While fishing,you make the following observations: A.Water spiders appear to be able walk on the surface of the water. B.Flat rocks may be made to skip across the water. Which of the following properties of water can explain these observations?

Which of the following macromolecules is insoluble in water?

Which of the following is an informational macromolecule?

An enzyme synthesized in the laboratory is found to have little activity when compared to the enzyme extracted from cell culture.Both enzymes were examined and have identical amino acid composition.What is the best explanation for the lack of activity of the synthesized enzyme?

Polymers are synthesized by ________ reactions and broken down into their constituent monomers by ________ reactions.

Carbon can form ________ covalent bonds.

Ribose has five carbon atoms,of which three are asymmetric.What is the maximum number of stereoisomers that may exist for ribose?

Why do ionic substances such as NaCl dissolve so readily in water?

Detergents are best able to dissolve oil from fabric or dishes during washing because

In order to facilitate polymerization,monomers must be ________.

Which of the following is false regarding water's specific heat?

All of the following are common functional groups found in biological molecules except

What inorganic precursors are needed to synthesize proteins?

Describe how the amphipathic nature of phospholipids leads to the formation of the phospholipid bilayer organization observed in membrane structure.Based upon this information,how would you design a drug delivery system to cross the cell membrane?

Which of the following statements about self-assembly is false?

A Preview of Cell Biology

The Macromolecules 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

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

DNA Replication, repair, and Recombination

Gene Expression: Ithe Genetic Code and Transcription

Gene Expression: Iiprotein Synthesis and Sorting

The Regulation of Gene Expression

Molecular Biology Techniques for Cell Biology

Signal Transduction Mechanisms: Ielectrical and Synaptic Signaling in Neurons

Signal Transduction Mechanisms: Iimessengers and Receptors

The Cell Cycle and Mitosis

Sexual Reproduction,meiosis,and Genetic Recombination

Filters

TMV,or ,is a rodlike particle with a genome of and a consisting of 2130 copies of a single polypeptide.

Polymers are synthesized by reactions and broken down into their constituent monomers by reactions.