The stages of respiration take place within an organelle enclosed by a double membrane, the mitochondrion. Which of the following processes occur only inside the mitochondria?

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#Question id: 12179

#Unit 2. Cellular Organization

Match the following human ABC proteins (Column I) with their function (Column II)

Column I	Column II
A. ABCB1	i. Transports Cl- ions
B. ABCB4	ii. Exports phosphatidylcholine into bile
C. CFTR	iii. Exports cholesterol and phospholipid for uptake into high-density lipoprotein (HDL)
	iv. Exports lipophilic drugs

Which of the following is correct?

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#Question id: 12178

#Unit 2. Cellular Organization

Following statements are regarding to V-class ATPases.

A. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the same direction.

B. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the same direction.

C. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the opposite direction.

D. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the opposite direction.

Which of the following combination is correct?

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#Question id: 12177

#Unit 2. Cellular Organization

Calculate the free energy required to move 1 mol of K+ ions from the outside of the cell (where [K+] = 4 mM) to the inside (where [K+] = 140 mM) when the membrane potential is –70 mV and the temperature is 37°C.

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#Question id: 11523

#Unit 2. Cellular Organization

In the given figure, which of the following complex represents high energy intermediate?

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#Question id: 11522

#Unit 2. Cellular Organization

What is the major function of the actuator domain in Na+-K+ ATPase?

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#Question id: 11521

#Unit 2. Cellular Organization

The Na+-K+ ATPase is responsible for maintaining: