Bio 111-01 Chapter 6

Which statement about ATP is true? A) The synthesis of ATP is an energy-neutral reaction. B) The hydrolysis of ATP to ADP and Pi is an exergonic reaction. C) The phosphate bond energy of ATP is used to power catabolic metabolism. D) ATP is a building block of protein. E) The phosphate bond energy of ATP may be transformed into the energy in a magnetic field.

Reagents, such as dinitrophenol, increase the permeability of the mitochondrial inner membrane to protons. The addition of dinitrophenol to a suspension of animal cells should, over the short term, A) decrease the rate of oxidation of NADH. B) inhibit mitochondrial ATP synthesis. C) increase lactic acid production. D) decrease the rate of pyruvate oxidation. E) stimulate ATP synthesis by mitochondria.

The mitochondrial ATP synthase A) is an entirely integral membrane protein. B) couples the synthesis of ATP to the flow of protons across the inner membrane from the mitochondrial matrix to the intermembrane space. C) is a soluble protein located in the mitochondrial matrix. D) makes ATP at the expense of the proton gradient established by electron transport. E) usually hydrolyzes ATP to establish a proton gradient.

The mitochondrial electron transport chain A) is the site of most of the reactions of the citric acid cycle. B) synthesizes ATP. C) pumps protons into the mitochondrial matrix during electron transport. D) oxidizes water to ½ O2 and 2 H+. E) oxidizes the intermediate electron carriers, NADH and FADH2.

Glycolysis A) is the conversion of glucose to two molecules of lactate. B) is an endergonic reaction. C) results in the net consumption of ATP. D) is an oxidation-reduction process. E) releases carbon dioxide.

The end products of glycolysis are A) pyruvate, ATP, and NADH. B) pyruvate, ATP, and NAD+. C) acetyl CoA, ATP, and NAD+. D) pyruvate. E) acetyl CoA, ATP, and NADH.

In the complete oxidation of glucose, 6 CO2 molecules are formed per glucose molecule oxidized. From the list below, choose the correct numbers of CO2 molecules released by glycolysis (Gly), the citric acid cycle (CAC), and pyruvate oxidation (Pyr). A) Gly 1; CAC 3; Pyr 2 B) Gly 0; CAC 4; Pyr 2 C) Gly 1; CAC 4; Pyr 1 D) Gly 2; CAC 2; Pyr 2 E) Gly 0; CAC 6; Pyr 0

Which statement about the citric acid cycle is true? A) It releases less energy than glycolysis. B) CO2 is absorbed during operation of the cycle. C) It takes place in the mitochondrial outer membrane. D) It requires NAD+ and FAD. E) It operates under anaerobic conditions.

Fermentation A) results in the formation of lactic acid or ethanol. B) completely oxidizes glucose to CO2 and H2O. C) is not coupled to ATP synthesis. D) occurs under aerobic conditions in yeasts. E) is endergonic.

The ultimate source of energy for ATP synthesis in chloroplasts is A) electron transport. B) the electrochemical proton gradient. C) light. D) energized chlorophylls. E) NADPH.

Which statement best characterizes the properties of a photosystem? A) A photosystem consists of antennae pigments only. B) Photosystems do not contain proteins. C) A photosystem consists of reaction center chlorophylls only. D) There is only one photosystem in green plants. E) A photosystem is a complex of pigments, proteins, and reaction center chlorophyll.

The immediate source of energy for ATP synthesis in chloroplasts is A) electron transport. B) the electrochemical proton gradient. C) light. D) energized chlorophylls. E) NADPH.

During photosynthesis in green plants, water is A) oxidized to O2 in the light. B) reduced to hydrogen gas. C) used to hydrolyze ATP. D) oxidized to O2 in the dark. E) an electron acceptor

In photosynthesis, NADPH is used for the A) reduction of O2 to water. B) synthesis of ATP. C) regeneration phase of the Calvin cycle. D) formation of 3-phosphoglycerate (3PG). E) reduction of 3-phosphoglycerate (3PG).

The major product of photosynthesis that is exported from the leaves to the rest of the plant is/are A) glucose. B) amino acids. C) starch. D) sucrose. E) nucleotides.