Question 1

The transient force which, while weak, still has a large impact on how macromolecules interact is the ____________.

Accepted Answer

Van der Wa

Question 2

Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
-Movement of particles due to the random fluctuations of energy content of the environment is known as ____________.

Accepted Answer

A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative 
A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative

Question 3

What charged group(s) are present in glycine at a pH of 7?

Accepted Answer

A)  -NH3+ 
B)  -COO- 
C)  -NH2+ 
D)  A and B 
E)  A, B, and C 
A)  -NH3+ 
B)  -COO- 
C)  -NH2+ 
D)  A and B 
E)  A, B, and C

Question 4

List atoms commonly found in biological molecules that are often hydrogen-bond acceptors.

Accepted Answer

A)  carbon 
B)  oxygen 
C)  nitrogen 
D)  B and C 
E)  All of the above. 
A)  carbon 
B)  oxygen 
C)  nitrogen 
D)  B and C 
E)  All of the above.

Question 5

The source of the key buffering component of blood is ____________.

Accepted Answer

The answer of The source of the key buffering component...

Question 6

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

Question 7

Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The charge of the side group of aspartate when the pH is more than one pH unit above the pKa.

Accepted Answer

A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative 
A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative

Question 8

A solvent with a low dielectric constant would be a ____________ solvent for salts.

Accepted Answer

The answer of A solvent with a low dielectric constant...

Question 9

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

Question 10

When the pH is more than two pH units above the pKa of a carboxyl group, the acid is ____________.

Accepted Answer

The answer of When the pH is more than two...

Question 11

Lipids that interact with both the water and the hydrophobic regions of the membrane are considered ____________.

Accepted Answer

The answer of Lipids that interact with both the water...

Question 12

Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: A molecule with two distinctive chemical properties or characteristics.

Accepted Answer

A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative 
A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative

Question 13

Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The type of bond found between an oxygen on one water molecule and hydrogen on a different water molecule.

Accepted Answer

A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative 
A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative

Question 14

Which of the following is considered a noncovalent bond?

Accepted Answer

A)  electrostatic interactions 
B)  hydrogen bonds 
C)  van der Waals interactions 
D)  All of the above. 
E)  None of the above. 
A)  electrostatic interactions 
B)  hydrogen bonds 
C)  van der Waals interactions 
D)  All of the above. 
E)  None of the above.

Question 15

An acid ionizes to form a proton and its ________________.

Accepted Answer

base or co

Question 16

Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
-Water weakens the electrostatic interaction of ions due to its high ____________.

Accepted Answer

A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative 
A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative

Question 17

What is the net effect of many van der Waals interactions?

Accepted Answer

At the interface of two large

Question 18

Use the following to answer questions 1-10:
Choose the correct answer from the list below. Not all of the answers will be used.
-____________: The charge of an amino group when the pH is one pH unit below the pKa.

Accepted Answer

A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative 
A) ionic bonds or salt bridges 
B) Brownian motion 
C) hydrophobic 
D) hydrogen 
E) polar
F)nonpolar
G)van der Waals
H)entropy
I)zwitterion
J)amphipathic
K)positive
L)dielectric constant
M)negative

Question 19

What is the concentration of acetic acid in 250 ml of a 100 mM acetate buffer at pH 4.76?

Accepted Answer

A)  250 mM 
B)  100 mM 
C)  50 mM 
D)  75 mM 
E)  There is not enough information to tell. 
A)  250 mM 
B)  100 mM 
C)  50 mM 
D)  75 mM 
E)  There is not enough information to tell.

Question 20

How is protein folding driven?

Accepted Answer

Nonpolar amino acids associate

Exam 2: Water, Weak Bonds, and the Generation of Order Out of Chaos

The transient force which, while weak, still has a large impact on how macromolecules interact is the ____________.

Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. -Movement of particles due to the random fluctuations of energy content of the environment is known as ____________.

What charged group(s) are present in glycine at a pH of 7?

List atoms commonly found in biological molecules that are often hydrogen-bond acceptors.

The source of the key buffering component of blood is ____________.

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

Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. -____________: The charge of the side group of aspartate when the pH is more than one pH unit above the pKa.

A solvent with a low dielectric constant would be a ____________ solvent for salts.

What two properties of water are important for biological interactions?

When the pH is more than two pH units above the pKa of a carboxyl group, the acid is ____________.

Lipids that interact with both the water and the hydrophobic regions of the membrane are considered ____________.

Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. -____________: A molecule with two distinctive chemical properties or characteristics.

Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. -____________: The type of bond found between an oxygen on one water molecule and hydrogen on a different water molecule.

Which of the following is considered a noncovalent bond?

An acid ionizes to form a proton and its ________________.

Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. -Water weakens the electrostatic interaction of ions due to its high ____________.

What is the net effect of many van der Waals interactions?

Use the following to answer questions 1-10: Choose the correct answer from the list below. Not all of the answers will be used. -____________: The charge of an amino group when the pH is one pH unit below the pKa.

What is the concentration of acetic acid in 250 ml of a 100 mM acetate buffer at pH 4.76?

How is protein folding driven?

Biochemistry and the Unity of Life

Amino Acids

Protein Three-Dimensional Structure

Techniques in Protein Biochemistry

Basic Concepts of Enzyme Action

Kinetics and Regulation

Mechanisms and Inhibitors

Hemoglobin: an Allosteric Protein

Carbohydrates

Lipids

Membrane Structure and Function

Signal Transduction Pathways

Digestion: Turning a Meal Into Cellular Biochemicals

Metabolism: Basic Concepts and Design

Glycolysis

Gluconeogenesis

Preparation for the Cycle

Harvesting Electrons From the Cycle

The Electron Transport Chain

The Proton-Motive Force

The Light Reactions

The Calvin Cycle

Glycogen Degradation

Glycogen Synthesis

The Pentose Phosphate Pathway

Fatty Acid Degredation

Fatty Acid Synthesis

Lipid Synthesis

Amino Acid Degradation and the Urea Cycle

Amino Acids Synthesis

Nucleotide Metabolism

The Structure of Informational Macromolecules: Dna and Rna

DNA Replication

DNA Repair and Recombination

RNA Synthesis and Regulation in Prokaryotes

Gene Expression in Eukaryotes

RNA Processing in Eukaryotes

The Genetic Code

The Mechanism of Protein Synthesis

Recombinant Dna Techniques

Filters