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

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

Using the figure below, explain how having unsaturated fatty acid tails on phospholipids affects the fluidity of the membrane.

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

The main function of the chloroplast is

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

List the three chemical properties of ATP that account for the large standard free energy change that occurs when a phosphoanhydride bond is cleaved.

Red blood cells are placed into a solution of unknown solute concentration. After an hour they have all burst open. The best explanation is that the solution

The inclusion of cholesterol in a membrane can change the behavior of the membrane. Compare how the membrane behaves at low cholesterol concentration compared with high cholesterol concentration.

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?

Describe how an antifreeze protein functions.

Energy conversion in living systems is required for what three types of work?

For a given reaction with a $\Delta$ G $\lt$ 0, the reaction is

Compare the reaction conditions under which you measure K_eq versus Q.

How can a reaction that is endergonic occur in a biological system?

Calculate the $\Delta$ G $\degree$ for the net reaction given the following two reactions:

If the Gibbs free energy change value for a reaction is less than zero, this reaction is

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

Which of the following is true?

The endomembrane system encompasses which part of the cell?

The fluidity of a membrane depends on