TLS Online TPP Program

#Question id: 117


Which of the following is not true of sterols?

#Section 2: General Biology
  1. Cholesterol is a sterol that is commonly found in mammals.

  2. They are commonly found in bacterial membranes.

  3. They are more common in plasma membranes than in intracellular membranes (mitochondria, lysosomes, etc.).

  4. They are precursors of steroid hormones.

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TLS Online TPP Program

#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)

TLS Online TPP Program

#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?

TLS Online TPP Program

#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.

TLS Online TPP Program

#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

TLS Online TPP Program

#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:

TLS Online TPP Program

#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?