Question 1

The interaction between nonpolar molecules is best characterized as

Accepted Answer

A)  a hydrogen bond. 
B)  ionic interactions. 
C)  van der Waals interactions. 
D)  a covalent bond. 
A)  a hydrogen bond. 
B)  ionic interactions. 
C)  van der Waals interactions. 
D)  a covalent bond.

Question 2

The endomembrane system encompasses which part of the cell?

Accepted Answer

A)  organelles 
B)  nucleus 
C)  cytoplasmic membrane structures 
D)  entire cell 
A)  organelles 
B)  nucleus 
C)  cytoplasmic membrane structures 
D)  entire cell

Question 3

What are the three major types of membranes?

Accepted Answer

Plasma mem

Question 4

The oxidation of glucose releases 15.7 kJ/g.Is this reaction spontaneous?

Accepted Answer

A)  Yes, because it is exothermic. 
B)  No, because it is exothermic. 
C)  Yes, because it is endothermic. 
D)  The answer cannot be determined. 
A)  Yes, because it is exothermic. 
B)  No, because it is exothermic. 
C)  Yes, because it is endothermic. 
D)  The answer cannot be determined.

Question 5

Describe how an antifreeze protein functions.

Accepted Answer

A)  Regularly spaced tyrosine residues prevent the ice crystals from growing. 
B)  Regularly spaced threonine resides prevent the ice crystals from growing. 
C)  Flickering clusters of hydrogen bonds prevent the ice crystals from growing. 
D)  The antifreeze protein prevents the water wires from forming. 
A)  Regularly spaced tyrosine residues prevent the ice crystals from growing. 
B)  Regularly spaced threonine resides prevent the ice crystals from growing. 
C)  Flickering clusters of hydrogen bonds prevent the ice crystals from growing. 
D)  The antifreeze protein prevents the water wires from forming.

Question 6

Which of the following are true about buffers?

Accepted Answer

A)  An effective buffer is made from a strong acid and strong base. 
B)  A buffer is most resistant to changes in pH when [HA] = [A-]. 
C)  A buffer is only resistant to changes in pH when acid is added. 
D)  The pH range of a buffering system is 0 to 14. 
A)  An effective buffer is made from a strong acid and strong base. 
B)  A buffer is most resistant to changes in pH when [HA] = [A-]. 
C)  A buffer is only resistant to changes in pH when acid is added. 
D)  The pH range of a buffering system is 0 to 14.

Question 7

Hydrogen bonds in liquid water are formed between

Accepted Answer

A)  two hydrogen atoms on the same molecule. 
B)  the oxygen of one molecule and the hydrogen of another. 
C)  protons and hydroxides. 
D)  two oxygen atoms on different molecules. 
A)  two hydrogen atoms on the same molecule. 
B)  the oxygen of one molecule and the hydrogen of another. 
C)  protons and hydroxides. 
D)  two oxygen atoms on different molecules.

Question 8

Calculate the   for the net reaction given the following two reactions:
Reaction 1:     
.
Reaction 2:     .

Accepted Answer

The net reaction is

Question 9

Calculate   for a reaction given  = 15.4 kJ/mole and   
= 2.0 J/K at 298 K.Is this reaction spontaneous in the forward direction?

Accepted Answer

Using the equation @#IMG-DLM&_TB6697_11a

Question 10

Compare a catabolic pathway versus an anabolic pathway.

Accepted Answer

Anabolic pathways synthesize b

Question 11

Differentiate between autotrophs and heterotrophs.

Accepted Answer

Autotrophs convert s

Question 12

Explain why a negative   does not necessarily mean it will be a rapid reaction.

Accepted Answer

@#IMG-DLM&_TB6697_11tells you whether a reaction i

Question 13

The endomembrane system is/are

Accepted Answer

A)  an intracellular network of lipid bilayers. 
B)  energy converting organelles. 
C)  a membrane surrounding the cell. 
D)  nucleotide-containing membranes. 
A)  an intracellular network of lipid bilayers. 
B)  energy converting organelles. 
C)  a membrane surrounding the cell. 
D)  nucleotide-containing membranes.

Question 14

Explain the first and second laws of thermodynamics and how they are relevant to the field of biochemistry.

Accepted Answer

The first law of thermodynamics states t

Question 15

Given the figure below,label the following: hydration layer,electrostatic interaction,hydrogen bond,van der Waals interaction.

Accepted Answer

The answer of Given the figure below,label the following: hydration...

Question 16

For a given reaction with a   ,the reaction is

Accepted Answer

A)  favorable in the reverse direction. 
B)  favorable in the forward direction. 
C)  unfavorable in both directions. 
D)  favorable in both directions. 
A)  favorable in the reverse direction. 
B)  favorable in the forward direction. 
C)  unfavorable in both directions. 
D)  favorable in both directions.

Question 17

The fluidity of a membrane depends on

Accepted Answer

A)  the degree of saturation of the phospholipids. 
B)  the number of phospholipids in the membrane. 
C)  the size of the polar head group. 
D)  osmotic pressure. 
A)  the degree of saturation of the phospholipids. 
B)  the number of phospholipids in the membrane. 
C)  the size of the polar head group. 
D)  osmotic pressure.

Question 18

Given a solution with pH > pKa,what are the relative concentrations of A- and HA?

Accepted Answer

A)  [HA] > [A-] 
B)  [HA] -] 
C)  [HA] = [A-] 
D)  [HA] = [A-] = 1 
A)  [HA] > [A-] 
B)  [HA] -] 
C)  [HA] = [A-] 
D)  [HA] = [A-] = 1

Question 19

Calculate the pH of a solution that contains 7.8   10-6 M OH-.

Accepted Answer

A)  1.28 
B)  5.11 
C)  12.72 
D)  8.89 
A)  1.28 
B)  5.11 
C)  12.72 
D)  8.89

Question 20

A hot pack on your arm is an example of what kind of system?

Accepted Answer

A)  open 
B)  closed 
C)  isolated 
D)  surroundings 
A)  open 
B)  closed 
C)  isolated 
D)  surroundings

Exam 2: Physical Biochemistry: Energy Conversion,water,and Membranes

The interaction between nonpolar molecules is best characterized as

The endomembrane system encompasses which part of the cell?

What are the three major types of membranes?

The oxidation of glucose releases 15.7 kJ/g.Is this reaction spontaneous?

Describe how an antifreeze protein functions.

Which of the following are true about buffers?

Hydrogen bonds in liquid water are formed between

Calculate the for the net reaction given the following two reactions: Reaction 1: . Reaction 2: .

Calculate for a reaction given = 15.4 kJ/mole and = 2.0 J/K at 298 K.Is this reaction spontaneous in the forward direction?

Compare a catabolic pathway versus an anabolic pathway.

Differentiate between autotrophs and heterotrophs.

Explain why a negative does not necessarily mean it will be a rapid reaction.

The endomembrane system is/are

Explain the first and second laws of thermodynamics and how they are relevant to the field of biochemistry.

Given the figure below,label the following: hydration layer,electrostatic interaction,hydrogen bond,van der Waals interaction.

For a given reaction with a ,the reaction is

The fluidity of a membrane depends on

Given a solution with pH > pKa,what are the relative concentrations of A- and HA?

Calculate the pH of a solution that contains 7.8 10-6 M OH-.

A hot pack on your arm is an example of what kind of system?

Principles of Biochemistry

Nucleic Acid Structure and Function

Protein Structure

Methods in Protein Biochemistry

Protein Function

Enzyme Mechanisms

Cell Signaling Systems

Glycolysis: a Paradigm of Metabolic Regulation

The Citrate Cycle

Oxidative Phosphorylation

Photosynthesis

Carbohydrate Structure and Function

Carbohydrate Metabolism

Lipid Structure and Function

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Metabolic Integration

Dna Replication, repair, and Recombination

Rna Synthesis, processing, and Gene Silencing

Protein Synthesis, posttranslational Modification, and Transport

Gene Regulation

Filters

Given a solution with pH > pKa,what are the relative concentrations of A^- and HA?

Calculate the pH of a solution that contains 7.8 10^-6 M OH^-.