Question 1

Osmosis is movement of a:

Accepted Answer

A)  charged solute molecule (ion) across a membrane. 
B)  gas molecule across a membrane. 
C)  nonpolar solute molecule across a membrane. 
D)  polar solute molecule across a membrane. 
E)  water molecule across a membrane. 
A)  charged solute molecule (ion) across a membrane. 
B)  gas molecule across a membrane. 
C)  nonpolar solute molecule across a membrane. 
D)  polar solute molecule across a membrane. 
E)  water molecule across a membrane.

Question 2

Water can act as _____ in biological reactions.

Accepted Answer

A)  a solvent 
B)  a reactant 
C)  a product 
D)  both a solvent and reactant 
E)  a solvent, reactant, and product 
A)  a solvent 
B)  a reactant 
C)  a product 
D)  both a solvent and reactant 
E)  a solvent, reactant, and product

Question 3

What is the CORRECT terminology for reactions A and B in the diagram?

Accepted Answer

A)  A = hydrolysis, B = condensation 
B)  A = condensation, B = hydrolysis 
C)  A = dehydrolysis, B = condensation 
D)  A = phosphorylation, B = phosphatase 
E)  A = metabolism, B = catabolism 
A)  A = hydrolysis, B = condensation 
B)  A = condensation, B = hydrolysis 
C)  A = dehydrolysis, B = condensation 
D)  A = phosphorylation, B = phosphatase 
E)  A = metabolism, B = catabolism

Question 4

Which statement CORRECTLY describes the forces that drive micelle formation from amphipathic molecules, such as fatty acids, dissolved in water?

Accepted Answer

A)  Head groups of the molecules are sequestered in the interior of the micelle, maximizing hydrogen bonding of the hydrophobic tail with surrounding solvent molecules. 
B)  Head groups of the molecules are exposed on the outer surface of the micelle, maximizing hydrogen bonding between hydrophobic tails. 
C)  Head groups of the molecules are exposed on the outer surface of the micelle, minimizing the order of the surrounding solvent molecules. 
D)  Hydrophilic tails are exposed on the outer surface of the micelle, maximizing hydrogen bonding between the tails and surrounding solvent molecules. 
E)  Hydrophobic tails are exposed on the outer surface of the micelle, maximizing hydrogen bonding between head groups. 
A)  Head groups of the molecules are sequestered in the interior of the micelle, maximizing hydrogen bonding of the hydrophobic tail with surrounding solvent molecules. 
B)  Head groups of the molecules are exposed on the outer surface of the micelle, maximizing hydrogen bonding between hydrophobic tails. 
C)  Head groups of the molecules are exposed on the outer surface of the micelle, minimizing the order of the surrounding solvent molecules. 
D)  Hydrophilic tails are exposed on the outer surface of the micelle, maximizing hydrogen bonding between the tails and surrounding solvent molecules. 
E)  Hydrophobic tails are exposed on the outer surface of the micelle, maximizing hydrogen bonding between head groups.

Question 5

A hydronium ion:

Accepted Answer

A)  has the structure H3O+. 
B)  is a hydrated hydrogen ion. 
C)  is a hydrated proton. 
D)  is the usual form of one of the dissociation products of water in solution. 
E)  All of the answers are correct. 
A)  has the structure H3O+. 
B)  is a hydrated hydrogen ion. 
C)  is a hydrated proton. 
D)  is the usual form of one of the dissociation products of water in solution. 
E)  All of the answers are correct.

Question 6

If the pH of a solution is 5.5, what is the pOH?

Accepted Answer

A)  8.5 
B)  -5.5 
C)  -8.5 
D)  14 
E)  6.5 
A)  8.5 
B)  -5.5 
C)  -8.5 
D)  14 
E)  6.5

Question 7

The Henderson-Hasselbalch equation:

Accepted Answer

A)  allows the graphic determination of the molecular weight of a weak acid from its pH alone. 
B)  does not explain the behavior of di- or tri-basic weak acids. 
C)  employs the same value for pKa for all weak acids. 
D)  is equally useful with solutions of acetic acid and of hydrochloric acid. 
E)  relates the pH of a solution to the pKa and the concentrations of acid and conjugate base. 
A)  allows the graphic determination of the molecular weight of a weak acid from its pH alone. 
B)  does not explain the behavior of di- or tri-basic weak acids. 
C)  employs the same value for pKa for all weak acids. 
D)  is equally useful with solutions of acetic acid and of hydrochloric acid. 
E)  relates the pH of a solution to the pKa and the concentrations of acid and conjugate base.

Osmosis is movement of a:

Water can act as _____ in biological reactions.

What is the CORRECT terminology for reactions A and B in the diagram?

Which statement CORRECTLY describes the forces that drive micelle formation from amphipathic molecules, such as fatty acids, dissolved in water?

A hydronium ion:

If the pH of a solution is 5.5, what is the pOH?

The Henderson-Hasselbalch equation:

The Foundations of Biochemistry

Amino Acids, Peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

DNA-Based Information Technologies

Lipids

Biological Membranes and Transport

Biosignaling

Bioenergetics and Biochemical Reaction Types

Glycolysis, Gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Carbohydrate Biosynthesis in Plants and Bacteria

Lipid Biosynthesis

Biosynthesis of Amino Acids, Nucleotides, and Related Molecules

Hormonal Regulation and Integration of Mammalian Metabolism

Genes and Chromosomes

DNA Metabolism

RNA Metabolism

Protein Metabolism

Regulation of Gene Expression

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Exam 2: Water

Osmosis is movement of a:

Water can act as _____ in biological reactions.

What is the CORRECT terminology for reactions A and B in the diagram?

Which statement CORRECTLY describes the forces that drive micelle formation from amphipathic molecules, such as fatty acids, dissolved in water?

A hydronium ion:

If the pH of a solution is 5.5, what is the pOH?

The Henderson-Hasselbalch equation:

The Foundations of Biochemistry

Amino Acids, Peptides, and Proteins

The Three-Dimensional Structure of Proteins

Protein Function

Enzymes

Carbohydrates and Glycobiology

Nucleotides and Nucleic Acids

DNA-Based Information Technologies

Lipids

Biological Membranes and Transport

Biosignaling

Bioenergetics and Biochemical Reaction Types

Glycolysis, Gluconeogenesis, and the Pentose Phosphate Pathway

Principles of Metabolic Regulation

The Citric Acid Cycle

Fatty Acid Catabolism

Amino Acid Oxidation and the Production of Urea

Oxidative Phosphorylation and Photophosphorylation

Carbohydrate Biosynthesis in Plants and Bacteria

Lipid Biosynthesis

Biosynthesis of Amino Acids, Nucleotides, and Related Molecules

Hormonal Regulation and Integration of Mammalian Metabolism

Genes and Chromosomes

DNA Metabolism

RNA Metabolism

Protein Metabolism

Regulation of Gene Expression

Filters