Question 1

In the figure below,identify the adenine base,ribose,and phosphoanhydride bonds.

Accepted Answer

The answer of In the figure below,identify the adenine base,ribose,and...

Question 2

Using the figure below,which of the following best describes the titration curve?

Accepted Answer

A)  The equivalence point for the titration is pH = 7. 
B)  The midpoint of the titration is pH = 7. 
C)  The pKa for this weak acid is 4.76. 
D)  This is a titration of a weak base by NaOH. 
A)  The equivalence point for the titration is pH = 7. 
B)  The midpoint of the titration is pH = 7. 
C)  The pKa for this weak acid is 4.76. 
D)  This is a titration of a weak base by NaOH.

Question 3

Energy conversion in a biological system operates under constant __________ and constant __________.

Accepted Answer

A)  heat; pressure 
B)  work; heat 
C)  pressure; volume 
D)  volume; heat 
A)  heat; pressure 
B)  work; heat 
C)  pressure; volume 
D)  volume; heat

Question 4

What is the concentration of H+ in a solution of 0.05 M NaOH?

Accepted Answer

A)  5   10-16 M 
B)  2   10-13 M 
C)  5   1012 M 
D)  140 M 
A)  5   10-16 M 
B)  2   10-13 M 
C)  5   1012 M 
D)  140 M

Question 5

Gibbs free energy can best be defined as the

Accepted Answer

A)  difference between the enthalpy and entropy of a system at a given temperature. 
B)  difference between exothermic and endothermic energy of a system at a given temperature. 
C)  addition of enthalpy and entropy of a system at a given temperature. 
D)  difference between pressure and volume at a given temperature. 
A)  difference between the enthalpy and entropy of a system at a given temperature. 
B)  difference between exothermic and endothermic energy of a system at a given temperature. 
C)  addition of enthalpy and entropy of a system at a given temperature. 
D)  difference between pressure and volume at a given temperature.

Question 6

A hydrogen bond can form between a hydrogen atom on a(n)

Accepted Answer

A)  electronegative donor group and another electronegative atom. 
B)  cationic atom and another hydrogen. 
C)  nonpolar donor group and an electronegative atom. 
D)  ionic atom and another anion. 
A)  electronegative donor group and another electronegative atom. 
B)  cationic atom and another hydrogen. 
C)  nonpolar donor group and an electronegative atom. 
D)  ionic atom and another anion.

Question 7

Limonene is a nonpolar molecule.The water molecules around it forms

Accepted Answer

A)  hydrogen bonds with itself and entropy decreases. 
B)  ionic bonds with itself and the entropy decreases. 
C)  hydrogen bonds with limonene and the entropy increases. 
D)  covalent bonds with limonene and entropy increases. 
A)  hydrogen bonds with itself and entropy decreases. 
B)  ionic bonds with itself and the entropy decreases. 
C)  hydrogen bonds with limonene and the entropy increases. 
D)  covalent bonds with limonene and entropy increases.

Question 8

Under steady-state conditions in a mammalian cell,the adenine nucleotide concentrations are [ATP] = 3.3 mM,[ADP] = 1.2 mM,and [AMP] = 0.2 mM.What is the energy charge of this cell?

Accepted Answer

A)  0.83 
B)  0.95 
C)  0.72 
D)  1.2 
A)  0.83 
B)  0.95 
C)  0.72 
D)  1.2

Question 9

If a reaction has a   and  
,under which conditions would the reaction be spontaneous in the forward direction?

Accepted Answer

A)  low temperatures 
B)  high temperatures 
C)  high pressure 
D)  low pressure 
A)  low temperatures 
B)  high temperatures 
C)  high pressure 
D)  low pressure

Question 10

Calculate the pH of a solution that contains 3.9   10-4M H+.

Accepted Answer

A)  4.59 
B)  10.59 
C)  3.41 
D)  9.41 
A)  4.59 
B)  10.59 
C)  3.41 
D)  9.41

Question 11

The change in entropy of a system is a function of a change in

Accepted Answer

A)  temperature and pressure. 
B)  volume and pressure. 
C)  enthalpy and pressure. 
D)  enthalpy and temperature. 
A)  temperature and pressure. 
B)  volume and pressure. 
C)  enthalpy and pressure. 
D)  enthalpy and temperature.

Question 12

Calculate the concentration of pH of a 0.023 M HCl solution.

Accepted Answer

A)  12.36 
B)  3.68 
C)  1.64 
D)  2.30 
A)  12.36 
B)  3.68 
C)  1.64 
D)  2.30

Question 13

Which of the following correctly describes the relationship between an ice cube melting on the table and the air surrounding it?

Accepted Answer

A)  The ice cube is the system and the air is the surroundings. 
B)  The air is the system and the ice cube is the surroundings. 
C)  The ice cube is the system and only the air is the universe. 
D)  The air is the system and only the ice cube is the universe. 
A)  The ice cube is the system and the air is the surroundings. 
B)  The air is the system and the ice cube is the surroundings. 
C)  The ice cube is the system and only the air is the universe. 
D)  The air is the system and only the ice cube is the universe.

Question 14

How do plants,fungi,and bacteria avoid the damaging effects of a hypotonic environment?

Accepted Answer

A)  flexible cells walls 
B)  rigid cells walls 
C)  semipermeable cell walls 
D)  photosynthesis 
A)  flexible cells walls 
B)  rigid cells walls 
C)  semipermeable cell walls 
D)  photosynthesis

Question 15

Osmosis occurs when water diffuses through a

Accepted Answer

A)  semipermeable membrane from high water to low water concentration. 
B)  nonpermeable membrane from high water to low water concentration. 
C)  semipermeable membrane from low water to high water concentration. 
D)  semipermeable membrane from high solute to low solute concentration. 
A)  semipermeable membrane from high water to low water concentration. 
B)  nonpermeable membrane from high water to low water concentration. 
C)  semipermeable membrane from low water to high water concentration. 
D)  semipermeable membrane from high solute to low solute concentration.

Question 16

Which of the following is the Kw value for pure water at   ?

Accepted Answer

A)  1   1014 
B)  1   10-14 
C)  7 
D)  14 
A)  1   1014 
B)  1   10-14 
C)  7 
D)  14

Question 17

Freezing point depression,boiling point elevation,and osmotic pressure are all what kind of properties?

Accepted Answer

A)  intrinsic properties 
B)  colligative properties 
C)  state functions 
D)  hydrophobic effects 
A)  intrinsic properties 
B)  colligative properties 
C)  state functions 
D)  hydrophobic effects

Question 18

If an unknown solution has low pKa value,it can be said with certainty that it is

Accepted Answer

A)  a weak acid. 
B)  a strong acid. 
C)  pure water. 
D)  a nonpolar solution. 
A)  a weak acid. 
B)  a strong acid. 
C)  pure water. 
D)  a nonpolar solution.

Question 19

In a hydrogen bond between a water molecule and another water molecule,

Accepted Answer

A)  a hydrogen ion on the water molecule forms an ionic bond with the oxygen ion on the other water. 
B)  the hydrogen bond typically forms between the oxygen atom of the water and the hydrogen on the other water. 
C)  a hydrogen on the water molecule forms a covalent bond to a hydrogen atom on the other water. 
D)  the hydrogen atom forms an ionic bond with a carbon on the other water. 
A)  a hydrogen ion on the water molecule forms an ionic bond with the oxygen ion on the other water. 
B)  the hydrogen bond typically forms between the oxygen atom of the water and the hydrogen on the other water. 
C)  a hydrogen on the water molecule forms a covalent bond to a hydrogen atom on the other water. 
D)  the hydrogen atom forms an ionic bond with a carbon on the other water.

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

In the figure below,identify the adenine base,ribose,and phosphoanhydride bonds.

Using the figure below,which of the following best describes the titration curve?

Energy conversion in a biological system operates under constant __________ and constant __________.

What is the concentration of H+ in a solution of 0.05 M NaOH?

Gibbs free energy can best be defined as the

A hydrogen bond can form between a hydrogen atom on a(n)

Limonene is a nonpolar molecule.The water molecules around it forms

Under steady-state conditions in a mammalian cell,the adenine nucleotide concentrations are [ATP] = 3.3 mM,[ADP] = 1.2 mM,and [AMP] = 0.2 mM.What is the energy charge of this cell?

If a reaction has a and ,under which conditions would the reaction be spontaneous in the forward direction?

Calculate the pH of a solution that contains 3.9 10-4M H+.

The change in entropy of a system is a function of a change in

Calculate the concentration of pH of a 0.023 M HCl solution.

Which of the following correctly describes the relationship between an ice cube melting on the table and the air surrounding it?

How do plants,fungi,and bacteria avoid the damaging effects of a hypotonic environment?

Osmosis occurs when water diffuses through a

Which of the following is the Kw value for pure water at ?

Freezing point depression,boiling point elevation,and osmotic pressure are all what kind of properties?

If an unknown solution has low pKa value,it can be said with certainty that it is

In a hydrogen bond between a water molecule and another water molecule,

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

Energy conversion in a biological system operates under constant and constant .

What is the concentration of H⁺ in a solution of 0.05 M NaOH?

Calculate the pH of a solution that contains 3.9 10^-⁴M H⁺.

Which of the following is the K_w value for pure water at ?