Biology multiple choice questions
How many ATP are produced by complete eukaryotic Aerobic Respiration of glucose? Select one: a. 4 b. 22 c. 28 d. 36 e. 38
The final product of the Krebs Cycle is Select one: a. H2O. b. CO2. c. oxaloacetate. d. Co-A. e. ATP.
Activation energy is Select one: a. released during a chemical reaction. b. unusable heat. c. reduced by low temperatures. d. required to start a chemical reaction. e. usable heat.
A compound is reduced if it Select one: a. loses an electron. b. loses an atom. c. gains an electron. d. gains an atom. e. is a cation. O2 produced by the light-dependent reaction is Select one: a. concentrated for later use. b. lost as a waste product. c. part of the light-independent reaction. d. used to make carbohydrates. e. None of these.
Which glycolysis reaction step produces water? Select one: a. phosphorylation of glucose b. DHAP becomes G3P c. 3PG becomes 2PG d. 2PG becomes PEP e. PEP becomes pyruvate
An exergonic reaction Select one: a. requires more energy than it releases. b. creates an explosion. c. does not require energy to start. d. releases more energy than it requires. e. absorbs heat from the environment.
How many carbons from glucose enter the metabolic pathway Krebs Cycle? Select one: a. one b. two c. three d. four e. six Athletes that push their cells to use up O2 can produce more energy by producingSelect one: a. ethanol. b. lactate. c. methane. d. acetone. e. butanol.
Excited P680 electrons eventually contribute to the formation of Select one: a. O2. b. H2. c. H2O. d. NADPH. e. ATP.
Pi is added to Select one: a. glucose. b. glucose phosphate. c. G3P. d. NAD+. e. pyruvate. If there is no O2 in the mitochondrion, what process STOPS first? Select one: a. pyruvate oxidation. b. oxidative phosphorylation. c. Krebs Cycle d. glycolysis. e. active transport of ATP.
The light-dependent reaction takes place Select one: a. outside the chloroplast. b. inside the chloroplast. c. on the thylakoid membrane. d. in the stroma. e. inside the granum.
Which molecule is produced with the help of electron carriers and chemiosmosis? Select one: a. O2. b. H2. c. H2O. d. NADPH. e. ATP. Carbon dioxide loss, or decarboxylation, occurs in the Krebs Cycle with the transition of Select one: a. citrate to isocitrate. b. isocitrate to a-ketoglutarate. c. succinate to fumarate. d. fumarate to malate. e. malate to oxaloacetate.
To start the Krebs Cylce Acetyl-CoA combines with Select one: a. citrate. b. succinate. c. fumarate, d. malate. e. oxaloacetate.
Enzymes inhibited by high levels of intermediate molecules for cellular respiration Select one: a. reduce O2 levels in the cell. b. control lactic acid levels in blood. c. maintain CO2 levels in the cell. d. control the level of ATP in the cell. e. maintain glucose levels in the blood.
Which product from the Krebs Cycle take energy to Oxidative Phosphorylation? Select one: a. NADH b. CO2 c. H2O d. Co-A e. ATP
The Light-Dependent Reactions rely on all of these EXCEPT Select one: a. chemiosmosis.b. P680.c. CO2.d. H2O.e. photons.
NADP reductase makes NADPH with electrons donated by Select one: a. H2O. b. Photosystem I. c. Photosystem II. d. an electron acceptor. e. chemiosmosis.
How does the light dependent reactions contribute to the production of carbohydrates? Select one: a. O2 is used to power the Calvin cycle. b. ATP and NADPH power the Calvin cycle. c. Photon energy is passed to RuBP. d. CO2 is modified to join the Calvin cycle. e. ATP and NADPH combine 2 G3P molecules to make glucose.
Fixing CO2 requires the action of the enzyme Select one: a. b6-f complex. b. synthase. c. rubisco. d. carotenase. e. cytochrome oxidase complex. Photosynthetic pigments are Select one: a. bright. b. embedded in the leaf surface. c. dull. d. embedded in thylakoid membrane. e. colourless.