The pathway for polypeptides exported from E. coli includes the following steps, which occur in what order for correct export?

1.  A chaperone, SecA, binds to the polypeptide.

2.  A chaperone, SecB, binds to the polypeptide.

3.  ATP is hydrolyzed by Sec A.

4.  SecA pushes 20 amino acids of the polypeptide into the translocation complex.

#Question id: 464

#Section 4: Fundamentals of Biological Engineering

Calculate the equilibrium constant for an oxidation-reduction reaction involving the transfer of 1 mole of electrons with DE0ʹ= 0.25 V. (R = 8.315 JK-1mol-1, F = 96.48 kJV-1mol-1, T = 298 K)

#Question id: 465

#Section 4: Fundamentals of Biological Engineering

If the standard reduction potential of a certain half-reaction is -0.30 V, which statement below is true for this half-reaction to proceed as a reduction?

#Question id: 466

#Section 4: Fundamentals of Biological Engineering

When a reduction half-reaction is ________ (negative, positive), electrons flow to the more readily reduced substance which is ________ (negative, positive) in value.

#Question id: 467

#Section 4: Fundamentals of Biological Engineering

The standard potential for electron transfer can be related to the standard free-energy change for redox reactions by using

#Question id: 469

#Section 2: General Biology

The anaerobic conversion of 1 mol of glucose to 2 mol of lactate by fermentation is accompanied by a net gain of:

#Question id: 532

#Section 4: Fundamentals of Biological Engineering

In glycolysis, fructose 1,6-bisphosphate is converted to two products with a standard free-energy change (DG'°) of 23.8 kJ/mol.  Under what conditions (encountered in a normal cell) will the free-energy change (DG) be negative, enabling the reaction to proceed to the right?