Question 1

Which of the following is NOT a possible noncovalent interaction?

Accepted Answer

A) van der Waals interactions 
B) polar covalent bonding 
C) ionic bonding 
D) hydrogen bonding 
E) hydrophobic interactions 
A) van der Waals interactions 
B) polar covalent bonding 
C) ionic bonding 
D) hydrogen bonding 
E) hydrophobic interactions

Question 2

Which of the following was NOT considered part of the "alphabet of biochemistry" by George Wald?

Accepted Answer

A) seven proteins 
B) the 20 amino acids 
C) the 5 nucleotide bases 
D) two sugars 
E) three lipids 
A) seven proteins 
B) the 20 amino acids 
C) the 5 nucleotide bases 
D) two sugars 
E) three lipids

Question 3

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

Question 4

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

Question 5

Which of the following is NOT a fundamental property of carbon?

Accepted Answer

A) Carbon- containing molecules form stereoisomers. 
B) Carbon- containing molecules are diverse. 
C) Carbon has a valence of 4. 
D) Carbon atoms are most likely to form ionic bonds with one another. 
E) Carbon- containing molecules are stable. 
A) Carbon- containing molecules form stereoisomers. 
B) Carbon- containing molecules are diverse. 
C) Carbon has a valence of 4. 
D) Carbon atoms are most likely to form ionic bonds with one another. 
E) Carbon- containing molecules are stable.

Question 6

The cell membrane can be described most accurately as

Accepted Answer

A) impermeable to all polar molecules. 
B) permeable to only larger molecules. 
C) permeable to most small molecules, but impermeable to larger ones. 
D) permeable to all molecules. 
E) permeable to some molecules and impermeable to others. 
A) impermeable to all polar molecules. 
B) permeable to only larger molecules. 
C) permeable to most small molecules, but impermeable to larger ones. 
D) permeable to all molecules. 
E) permeable to some molecules and impermeable to others.

Question 7

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the bond.

Accepted Answer

The answer of The purpose of reducing and oxidizing agents...

Question 8

Which of the following molecules is involved with assisted assembly?

Accepted Answer

A) water molecules 
B) helper proteins 
C) tobacco mosaic viruses 
D) molecular chaperones 
E) none of the above 
A) water molecules 
B) helper proteins 
C) tobacco mosaic viruses 
D) molecular chaperones 
E) none of the above

Question 9

The moon lacks life and varies dramatically in temperature. If we could keep a layer of water spread on the surface of the moon, what effect would it have?

Accepted Answer

A) The temperatures would drop to the lower extremes. 
B) Physical conditions would remain the same. 
C) Life would be possible, but it would have to withstand these extremes in temperature. 
D) Water would absorb and hold heat and moderate the temperature extremes. 
E) Because water has a high heat of vaporization, the temperatures would rise to the upper extremes. 
A) The temperatures would drop to the lower extremes. 
B) Physical conditions would remain the same. 
C) Life would be possible, but it would have to withstand these extremes in temperature. 
D) Water would absorb and hold heat and moderate the temperature extremes. 
E) Because water has a high heat of vaporization, the temperatures would rise to the upper extremes.

Question 10

Which of the following biological polymers is mismatched with its monomer?

Accepted Answer

A) DNA - nucleotide 
B) chitin - monosaccharide 
C) enzyme - amino acid 
D) cellulose - amino acid 
E) protein - amino acid 
A) DNA - nucleotide 
B) chitin - monosaccharide 
C) enzyme - amino acid 
D) cellulose - amino acid 
E) protein - amino acid

Question 11

carbon atoms allow for the formation of , which are mirror images of each other.

Accepted Answer

Asymmetric

Question 12

and groups are negatively charged functional groups of carbon, whereas the group is a positively charged functional group.

Accepted Answer

Carboxyl;

Question 13

Which of the following is NOT true of hydrocarbons?

Accepted Answer

A) Many hydrocarbons are used in living systems. 
B) Phospholipids have hydrocarbon tails. 
C) Hydrocarbons are insoluble in water. 
D) Only hydrogen atoms are used to complete the valence requirements of carbon. 
E) Octane is a hydrocarbon. 
A) Many hydrocarbons are used in living systems. 
B) Phospholipids have hydrocarbon tails. 
C) Hydrocarbons are insoluble in water. 
D) Only hydrogen atoms are used to complete the valence requirements of carbon. 
E) Octane is a hydrocarbon.

Question 14

Due to the directionality of polymer synthesis, proteins have a distinct _ and
end.

Accepted Answer

amino (- N

Question 15

In order to facilitate polymerization, monomers must be .

Accepted Answer

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

Question 16

A hypothetical automobile has 100 parts that are to be assembled by four workers. During the car's assembly, each worker constructs 25 parts individually, and then the four resulting components are assembled together. The manner in which the car was assembled is much like which cellular strategy?

Accepted Answer

A) renaturation 
B) self- assembly 
C) assisted self- assembly 
D) hierarchical assembly 
E) electrostatic assembly 
A) renaturation 
B) self- assembly 
C) assisted self- assembly 
D) hierarchical assembly 
E) electrostatic assembly

Which of the following is NOT a possible noncovalent interaction?

Which of the following was NOT considered part of the "alphabet of biochemistry" by George Wald?

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

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?

Which of the following is NOT a fundamental property of carbon?

The cell membrane can be described most accurately as

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the bond.

Which of the following molecules is involved with assisted assembly?

The moon lacks life and varies dramatically in temperature. If we could keep a layer of water spread on the surface of the moon, what effect would it have?

Which of the following biological polymers is mismatched with its monomer?

carbon atoms allow for the formation of , which are mirror images of each other.

and groups are negatively charged functional groups of carbon, whereas the group is a positively charged functional group.

Which of the following is NOT true of hydrocarbons?

Due to the directionality of polymer synthesis, proteins have a distinct _ and end.

In order to facilitate polymerization, monomers must be .

A hypothetical automobile has 100 parts that are to be assembled by four workers. During the car's assembly, each worker constructs 25 parts individually, and then the four resulting components are assembled together. The manner in which the car was assembled is much like which cellular strategy?

A Preview of the Cell

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 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

Filters

Exam 2: The Chemistry of the Cell

Which of the following is NOT a possible noncovalent interaction?

Which of the following was NOT considered part of the "alphabet of biochemistry" by George Wald?

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

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?

Which of the following is NOT a fundamental property of carbon?

The cell membrane can be described most accurately as

The purpose of reducing and oxidizing agents in denaturation and renaturation is the breaking and reforming of the bond.

Which of the following molecules is involved with assisted assembly?

The moon lacks life and varies dramatically in temperature. If we could keep a layer of water spread on the surface of the moon, what effect would it have?

Which of the following biological polymers is mismatched with its monomer?

carbon atoms allow for the formation of , which are mirror images of each other.

and groups are negatively charged functional groups of carbon, whereas the group is a positively charged functional group.

Which of the following is NOT true of hydrocarbons?

Due to the directionality of polymer synthesis, proteins have a distinct _ and end.

In order to facilitate polymerization, monomers must be .

A hypothetical automobile has 100 parts that are to be assembled by four workers. During the car's assembly, each worker constructs 25 parts individually, and then the four resulting components are assembled together. The manner in which the car was assembled is much like which cellular strategy?

A Preview of the Cell

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 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

Filters