Multiple Choice
At one time the uncoupler 2,4-dinitrophenol was used as a weight reducing drug. Its side-effects, including death, resulted in its discontinued use. How could this drug cause weight loss?
A) The uncoupler allows the oxidation of fats from adipose tissue without the production of ATP. This allows the oxidation to proceed continuously and use up the fats.
B) The uncoupler causes ATP to be produced at a much higher rate than normal and this causes weight loss.
C) The uncoupler inhibits the transport of pyruvate into the matrix of the mitochondria. Fats are then degraded to glycerol and subsequently to pyruvate to provide the necessary energy. Thereby depleting fat stores.
D) The uncoupler is an allosteric activator of ATP synthase. This increases the rate of translocation of H+ and the oxidation of fuels, including fats.
Correct Answer:

Verified
Correct Answer:
Verified
Q17: The source of energy to produce ATP
Q24: Fumarate reductase essentially catalyzes the reverse reaction
Q51: How many protons are translocated across the
Q62: Rotation of the subunit of ATP synthase
Q63: Which component of ATP synthase is the
Q64: In mammals the enzyme complexes of oxidative
Q65: A lipid-soluble cofactor that can diffuse freely
Q73: The presence of superoxide dismutase (SOD)in mammalian
Q82: The chemiosmotic theory explains that the energy
Q93: Which complex in the electron transport chain