Exam 4: Physiology of Cells

Which of the following is true of catabolic pathways?

Oxygen is used in the citric acid cycle in cell respiration.

Most of the chemical energy released by the citric acid cycle is in the form of ATP.

For osmosis to occur,there must be at least one impermeable solute present.

The proteins in the cell membrane that can open and close are called:

Which of the following is true of anabolic pathways?

Protein synthesis is an anabolic pathway for cells.

Facilitated diffusion and simple diffusion move substances in opposite directions.

Glycolysis produces very little ATP,but produces several molecules of NADH and FADH₂.

Proenzymes are unable to act as a catalyst in any type of chemical reaction.

The process of glycolysis produces two molecules of pyruvic acid for every one molecule of glucose.

Materials can be moved from a low concentration to a high concentration through:

The vesicles used in exocytosis have broken off from the mitochondria and are pulled to the cell membrane by the cytoskeleton.

Gated channels in the cell membrane can be "opened" by:

The sodium-potassium pump is an example of a passive transport process.

One possible end product of glycolysis is lactic acid.

Dialysis is a form of filtration that results in a separation of small and large solute particles.

Protein anabolism is a rarely used cellular activity.

Anaerobic respiration is about 17 times more efficient in producing ATP than is aerobic respiration.

Phagocytosis and exocytosis are opposite processes.