Question 1

How do hydrophobic interactions aid in protein folding?

Accepted Answer

Hydrophobic interactions cause

Question 2

The number of hydrogen bonds formed between A and T is _____.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  2 if in DNA, 3 if in RNA 
A)  1 
B)  2 
C)  3 
D)  4 
E)  2 if in DNA, 3 if in RNA

Question 3

The number of hydrogen bonds formed between G and C is _____.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  2 if in RNA, 3 if in DNA 
A)  1 
B)  2 
C)  3 
D)  4 
E)  2 if in RNA, 3 if in DNA

Question 4

Which of the following is considered a metabolite,a substance that is chemically transformed in a biochemical process?

Accepted Answer

A)  deoxyribonucleic acid 
B)  glycerol 
C)  protein 
D)  ribonucleic acid 
E)  polysaccharide 
A)  deoxyribonucleic acid 
B)  glycerol 
C)  protein 
D)  ribonucleic acid 
E)  polysaccharide

Question 5

Typical van der Waals energies are about

Accepted Answer

A)  4-20 kJ mol-1. 
B)  2-4 kJ mol-1. 
C)  200 kJ mol-1. 
D)  500-1000 kJ mol-1. 
E)  None of the answers is correct. 
A)  4-20 kJ mol-1. 
B)  2-4 kJ mol-1. 
C)  200 kJ mol-1. 
D)  500-1000 kJ mol-1. 
E)  None of the answers is correct.

Question 6

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 7

What are the primary chemical components present in a phosphate buffer at pH 7.4?

Accepted Answer

A)  H3PO4 and PO43- 
B)  H2PO4- and PO43- 
C)  HPO42- and PO43- 
D)  H2PO4- and HPO42- 
E)  H3PO4 and HPO42- 
A)  H3PO4 and PO43- 
B)  H2PO4- and PO43- 
C)  HPO42- and PO43- 
D)  H2PO4- and HPO42- 
E)  H3PO4 and HPO42-

Question 8

What did Watson and Crick suggest to be significant about the base pairing found in the helix?

Accepted Answer

A)  It allowed the DNA to twist in a helix. 
B)  The DNA could be circular. 
C)  It was a mechanism for copying. 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  It allowed the DNA to twist in a helix. 
B)  The DNA could be circular. 
C)  It was a mechanism for copying. 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Question 9

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

Question 10

If the First Law of Thermodynamics is true,how can biological processes be carried out?

Accepted Answer

Although energy cannot be crea

Exam 1: Biochemistry: An Evolving Science

How do hydrophobic interactions aid in protein folding?

The number of hydrogen bonds formed between A and T is _____.

The number of hydrogen bonds formed between G and C is _____.

Which of the following is considered a metabolite,a substance that is chemically transformed in a biochemical process?

Typical van der Waals energies are about

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

What are the primary chemical components present in a phosphate buffer at pH 7.4?

What did Watson and Crick suggest to be significant about the base pairing found in the helix?

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

If the First Law of Thermodynamics is true,how can biological processes be carried out?

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

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

Oxidative Phosphorylation

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?