alanwalkzzz

Which of the following description(s) regarding cellular respiration is/are correct?

I. ATP hydrolysis is used to drive reactions that require an input of free energy.

II. The oxidation of food molecules forms ATP from ADP + Pi.

III. A transmembrane proton-motive force drives ATP synthesis.

a) I only b) I and II only c) I and III only d) II and III only e) I, II, and III

11. Which of the following features are not part of the ATP-ADP cycle in biological systems>

a. ATP hydrolysis is used to drive reactions that require an input of free energy

b. The oxidation of fuel molecules forms ADP + Pi from ATP

c. A transmembrane proton-motive force drives ATP synthesis

d. The oxidation of fuel molecules forms ATP from ADP + Pi

12. Why can’t cells use the breakdown of glucose to pyruvate to generate energy without further conversion of pyruvate via fermentation or respiration?

a. The amount of energy produced by glycolysis alone is insufficient to fuel cell growth

b. The electron acceptor reduced during glycolysis must be generated

c. The amount of inorganic phosphate available becomes limiting

d. The rate of energy production by glycolysis alone is too slow for cells’ biochemical reactions

e. The complete breakdown of pyruvate is necessary to produce the carbon dioxide needed by cells

13. If you were studying enzymes involved in the citric acid cycle, you would isolate the following organelle:

a. Nucleus

b. Peroxisomes

c. Mitochondria

d. Lysosomes

e. Endoplasmic reticulum

14. Which of the following enzymes will not be impaired by a vitamin B1 deficiency?

a. Transketolase

b. Isocitrate dehydrogenase

c. Pyruvate dehydrogenase

d. Alpha-ketoglutarate dehydrogenase

15. The rate of flow of electrons through the electron transport chain is most directly regulated by:

a. ATP:ADP ratio

b. Acetyl CoA concentration

c. Rate of oxidative phophorylation

d. Catalytic rate of cytochrome oxidase

e. Feedback inhibition by water