Question 1

Which of the following would likely form micelles in an aqueous solution?

Accepted Answer

A) hexane 
B) glucose 
C) glutamic acid 
D) dodecanoic acid 
E) none of the above 
A) hexane 
B) glucose 
C) glutamic acid 
D) dodecanoic acid 
E) none of the above

Question 2

Lysine contains two amine groups (pKa values of 9.0 and 10.0)and a carboxylic acid group (pKa 2.2).In a solution of pH 9.5,which of the following would best describe the protonation and charge state of lysine?

Accepted Answer

A) carboxylic acid: deprotonated and neutral;both amines: protonated and positive 
B) carboxylic acid: deprotonated and negative;both amines: deprotonated and neutral 
C) carboxylic acid: deprotonated and negative;amine (pKa 9.0): deprotonated and neutral;amine (pKa 10.0): protonated and positive 
D) carboxylic acid: deprotonated and negative;amine (pKa 9.0): protonated and positive;amine (pKa 10.0): deprotonated and neutral 
E) carboxylic acid: deprotonated and neutral;amine (pKa 9.0): deprotonated and neutral;amine (pKa 10.0): protonated and positive 
A) carboxylic acid: deprotonated and neutral;both amines: protonated and positive 
B) carboxylic acid: deprotonated and negative;both amines: deprotonated and neutral 
C) carboxylic acid: deprotonated and negative;amine (pKa 9.0): deprotonated and neutral;amine (pKa 10.0): protonated and positive 
D) carboxylic acid: deprotonated and negative;amine (pKa 9.0): protonated and positive;amine (pKa 10.0): deprotonated and neutral 
E) carboxylic acid: deprotonated and neutral;amine (pKa 9.0): deprotonated and neutral;amine (pKa 10.0): protonated and positive

Question 3

Formic acid is the active agent in an ant bite.What is the ratio of base/acid for formic acid (pKa 3.9)in the blood stream at pH 7.4?

Accepted Answer

A) 3.16 $\times$ 10-4 
B) 3.16 $\times$ 103 
C) 3.5 
D) 0.54 
E) 1.90 
A) 3.16 $\times$ 10-4 
B) 3.16 $\times$ 103 
C) 3.5 
D) 0.54 
E) 1.90

Question 4

Which of the following represents the breaking of a noncovalent interaction?

Accepted Answer

A) hydrolysis of an ester 
B) dissolving of salt crystals 
C) ionization of water 
D) decomposition of hydrogen peroxide 
E) none of the above 
A) hydrolysis of an ester 
B) dissolving of salt crystals 
C) ionization of water 
D) decomposition of hydrogen peroxide 
E) none of the above

Which of the following would likely form micelles in an aqueous solution?

Lysine contains two amine groups (pK_a values of 9.0 and 10.0)and a carboxylic acid group (pK_a 2.2).In a solution of pH 9.5,which of the following would best describe the protonation and charge state of lysine?

Formic acid is the active agent in an ant bite.What is the ratio of base/acid for formic acid (pK_a 3.9)in the blood stream at pH 7.4?

Which of the following represents the breaking of a noncovalent interaction?

The Scope of Biochemistry

The Energetics of Life

Nucleic Acids

Introduction to Proteins: the Primary Level of Protein Structure

The Three-Dimensional Structure of Proteins

Protein Function and Evolution

Contractile Proteins and Molecular Motors

Carbohydrates: Sugars,saccharides,glycans

Lipids,membranes and Cellular Transport

Enzymes: Biological Catalysts

Chemical Logic of Metabolism

Carbohydrate Metabolism: Glycolysis, gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Citric Acid Cycle and Glyoxylate Cycle

Electron Transport, oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism I: Fatty Acids,triacylglycerols,and Lipoproteins

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Lipid Metabolism Ii: Membrane Lipids, steroids, isoprenoids, and Eicosanoids

Metabolism of Nitrogenous Compounds I: Principles of Biosynthesis, utilization, and Turnover

Metabolism of Nitogenous Compounds Ii: Amino Acids, porphyrins, and Neurotransmitters

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes,genomes and Chromosomes

Dna Replication

Dna Restructuring: Repair,recombination,rearrangement,amplification

Information Readout: Transcription and Post-Transcriptional Processing

Information Decoding: Translation and Post-Translational Protein Processing

Regulation of Gene Expression

Filters

Exam 2: The Matrix of Life: Weak Interactions in an Aqueous Environment

Which of the following would likely form micelles in an aqueous solution?

Lysine contains two amine groups (pKa values of 9.0 and 10.0)and a carboxylic acid group (pKa 2.2).In a solution of pH 9.5,which of the following would best describe the protonation and charge state of lysine?

Formic acid is the active agent in an ant bite.What is the ratio of base/acid for formic acid (pKa 3.9)in the blood stream at pH 7.4?

Which of the following represents the breaking of a noncovalent interaction?

The Scope of Biochemistry

The Energetics of Life

Nucleic Acids

Introduction to Proteins: the Primary Level of Protein Structure

The Three-Dimensional Structure of Proteins

Protein Function and Evolution

Contractile Proteins and Molecular Motors

Carbohydrates: Sugars,saccharides,glycans

Lipids,membranes and Cellular Transport

Enzymes: Biological Catalysts

Chemical Logic of Metabolism

Carbohydrate Metabolism: Glycolysis, gluconeogenesis, glycogen Metabolism, and the Pentose Phosphate Pathway

Citric Acid Cycle and Glyoxylate Cycle

Electron Transport, oxidative Phosphorylation, and Oxygen Metabolism

Photosynthesis

Lipid Metabolism I: Fatty Acids,triacylglycerols,and Lipoproteins

Interorgan and Intracellular Coordination of Energy Metabolism in Vertebrates

Lipid Metabolism Ii: Membrane Lipids, steroids, isoprenoids, and Eicosanoids

Metabolism of Nitrogenous Compounds I: Principles of Biosynthesis, utilization, and Turnover

Metabolism of Nitogenous Compounds Ii: Amino Acids, porphyrins, and Neurotransmitters

Nucleotide Metabolism

Mechanisms of Signal Transduction

Genes,genomes and Chromosomes

Dna Replication

Dna Restructuring: Repair,recombination,rearrangement,amplification

Information Readout: Transcription and Post-Transcriptional Processing

Information Decoding: Translation and Post-Translational Protein Processing

Regulation of Gene Expression

Filters

Lysine contains two amine groups (pK_a values of 9.0 and 10.0)and a carboxylic acid group (pK_a 2.2).In a solution of pH 9.5,which of the following would best describe the protonation and charge state of lysine?

Formic acid is the active agent in an ant bite.What is the ratio of base/acid for formic acid (pK_a 3.9)in the blood stream at pH 7.4?