MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Use the following ﬁgure and the stages labeled A, B, C, D, and E to answer the following questions.
Figure 10.2 1) If ATP used by this plant is labeled with radioactive phosphorus, in which molecules will the radioactivity be measurable after one "turn" of the cycle? A) in B and E only B) in B, C, D, and E C) in B and C only D) in B only E) in B, C, and D only 1)
2) If the carbon atom of the incoming CO2 molecule is labeled with a radioactive isotope of carbon, where will the radioactivity be measurable after one cycle? A) in C only B) in B and C C) in A, B, and C D) in E only E) in C, D, and E 3) Which molecule(s) of the Calvin cycle is/are most like molecules found in glycolysis? A) B, C, and E B) E only C) C and D only D) A only E) A, B, C, and E 4) What is the reducing agent in the following reaction? Pyruvate + NADH + H+ → Lactate + NAD + A) NAD+ B) oxygen C) NADH D) pyruvate E) lactate
5) The immediate energy source that drives ATP synthesis by ATP synthase during oxidative phosphorylation is A) the ﬂow of electrons down the electron transport chain. B) the oxidation of glucose and other organic compounds. C) the H+ concentration gradient across the inner mitochondrial membrane. D) the afﬁnity of oxygen for electrons. E) the transfer of phosphate to ADP. 6) Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule? A) the electron transport chain B) synthesis of acetyl CoA from pyruvate C) the citric acid cycle D) reduction of pyruvate to lactate E) glycolysis 7) In mitochondria, exergonic redox reactions A) provide the energy that establishes the proton gradient. B) reduce carbon atoms to carbon dioxide. C) are directly coupled to substrate-level phosphorylation. D) are the source of energy driving prokaryotic ATP synthesis. E) are...