Question 1

The simplest way to depict stereochemistry is to use

Accepted Answer

A)  ball-and-stick models. 
B)  ribbon diagrams. 
C)  space-filling models. 
D)  Fisher projections. 
E)  None of the answers is correct. 
A)  ball-and-stick models. 
B)  ribbon diagrams. 
C)  space-filling models. 
D)  Fisher projections. 
E)  None of the answers is correct.

Question 2

What two properties of water are important for biological interactions?

Accepted Answer

A)  the polarity of water 
B)  the density of water 
C)  the cohesive properties of water 
D)  the polarity of water and the cohesive properties of water 
E)  the density of water and the cohesive properties of water 
A)  the polarity of water 
B)  the density of water 
C)  the cohesive properties of water 
D)  the polarity of water and the cohesive properties of water 
E)  the density of water and the cohesive properties of water

Question 3

The term _____ is used to indicate Gibbs free energy.

Accepted Answer

A)  $\Delta$H 
B)  $\Delta$E 
C) $\Delta$S 
D)  $\Delta$G 
E)  $\Delta$T 
A)  $\Delta$H 
B)  $\Delta$E 
C) $\Delta$S 
D)  $\Delta$G 
E)  $\Delta$T

Question 4

What is the [A-]/[HA] ratio when a weak acid is in a solution one pH unit below its pKa?

Accepted Answer

A)  1:1 
B)  1:10 
C)  10:1 
D)  2:1 
E)  None of the answers is correct. 
A)  1:1 
B)  1:10 
C)  10:1 
D)  2:1 
E)  None of the answers is correct.

Question 5

How do hydrophobic interactions aid in protein folding?

Accepted Answer

Hydrophobic interactions cause

Question 6

If the whole chain is used in a nonoverlapping frame, how many amino acids are defined by this DNA sequence: ATGTTTGGACTA?

Accepted Answer

A)  two 
B)  three 
C)  four 
D)  six 
E)  twelve 
A)  two 
B)  three 
C)  four 
D)  six 
E)  twelve

Question 7

Entropy is defined as

Accepted Answer

A)  a spontaneous reaction. 
B)  the enthalpy of the system. 
C)  the measure of randomness of a system. 
D)  the amount of heat exchanged. 
E)  None of the answers is correct. 
A)  a spontaneous reaction. 
B)  the enthalpy of the system. 
C)  the measure of randomness of a system. 
D)  the amount of heat exchanged. 
E)  None of the answers is correct.

Question 8

The energies for hydrogen bonds are approximately

Accepted Answer

A)  400 kJ mol-1. 
B)  100-240 kJ mol-1. 
C)  4-20 kJ mol-1. 
D)  200 kJ mol-1. 
E)  None of the answers is correct. 
A)  400 kJ mol-1. 
B)  100-240 kJ mol-1. 
C)  4-20 kJ mol-1. 
D)  200 kJ mol-1. 
E)  None of the answers is correct.

Question 9

What are the enthalpy and entropy changes that accompany the formation of DNA double helices from complementary single strands of DNA?

Accepted Answer

There is a loss of entropy from the syst

Question 10

What is the [H+] concentration in a urine sample that has a pH of 6?

Accepted Answer

A)  10-6 M 
B)  10-8 M 
C)  106 M 
D)  10-14 M 
E)  6 M 
A)  10-6 M 
B)  10-8 M 
C)  106 M 
D)  10-14 M 
E)  6 M

Exam 1: Biochemistry: an Evolving Science

The simplest way to depict stereochemistry is to use

What two properties of water are important for biological interactions?

The term _____ is used to indicate Gibbs free energy.

What is the [A-]/[HA] ratio when a weak acid is in a solution one pH unit below its pKa?

How do hydrophobic interactions aid in protein folding?

If the whole chain is used in a nonoverlapping frame, how many amino acids are defined by this DNA sequence: ATGTTTGGACTA?

Entropy is defined as

The energies for hydrogen bonds are approximately

What are the enthalpy and entropy changes that accompany the formation of DNA double helices from complementary single strands of DNA?

What is the [H+] concentration in a urine sample that has a pH of 6?

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Oxidative Phosphorylation

Catalytic Strategies

Regulatory Strategies

Carbohydrates

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, Repair, and Recombination

Rna Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

What is the [A^-]/[HA] ratio when a weak acid is in a solution one pH unit below its pK_a?

What is the [H⁺] concentration in a urine sample that has a pH of 6?