Who Wants To Be A Science Expert? With your host, Ms. Beth Walker

$100 The oxygen consumed during cellular respiration is directly involved in: The oxygen consumed during cellular respiration is directly involved in: A) Glycolysis B) Accepting electrons at the end of the ETC c) The citric acid cycle D) The oxidation of pyruvate to acetyl CoA

$100 - Answer The correct answer is B!! The correct answer is B!! Oxygen is very electronegative and pulls the electrons down the ETC to itself Oxygen is very electronegative and pulls the electrons down the ETC to itself

$500 Cyclic electron flow in the chloroplast produces: Cyclic electron flow in the chloroplast produces: A) ATP B) NADPH C) Glucose D) A and B E) A, B and C

$500 - Answer The correct answer is A!!! The correct answer is A!!! Cyclic electron flow is a part of the light-dependent reactions. This part of the light reactions makes ATP, which goes to the dark reactions to make glucose. Cyclic electron flow is a part of the light-dependent reactions. This part of the light reactions makes ATP, which goes to the dark reactions to make glucose.

$1000 In a plant cell, where is ATP synthase located? In a plant cell, where is ATP synthase located? A) Thylakoid membrane B) Plasma membrane C) Inner mitochondrial membrane D) A and C E) A, B, and C

$ Answer The correct answer is D!! The correct answer is D!! Plant cells have both mitochondria and chloroplast. ATP is made in both of these organelles by chemiosmosis. Plant cells have both mitochondria and chloroplast. ATP is made in both of these organelles by chemiosmosis.

$2000 All of the following statements about NAD+ are true EXCEPT: All of the following statements about NAD+ are true EXCEPT: A) NAD+ is reduced to NADH during both glycolysis and the Kreb’s Cycle B) NAD+ has more chemical energy than NADH. C) NAD+ can receive electrons for use in oxidative phosphorylation D) In the absence of NAD+, glycolysis cannot function

$ Answer The correct answer is B!!! The correct answer is B!!! NAD+ loses an electron (b/c’s oxidized) to NADH (gets reduced). NADH has accepted an electron, which means it has more energy. NAD+ loses an electron (b/c’s oxidized) to NADH (gets reduced). NADH has accepted an electron, which means it has more energy.

$4000 All of the following are products or intermediaries in glycolysis EXCEPT: All of the following are products or intermediaries in glycolysis EXCEPT: A) ATP B) NADH C) FADH 2 D) Pyruvate E) Phosphoenol- pyruvate

$4000- Answer The correct answer is C!!! The correct answer is C!!! FADH 2 is created during the Kreb’s Cycle. FADH 2 leaves the Kreb’s Cycle and carries electrons to the ETC. FADH 2 is created during the Kreb’s Cycle. FADH 2 leaves the Kreb’s Cycle and carries electrons to the ETC.

$8000 What is the primary function of the light reactions of photosynthesis? What is the primary function of the light reactions of photosynthesis? A) Make energy-rich glucose from CO 2 & H 2 O B) Make ATP & NADPH C) Make NADPH used in respiration D) Use ATP to make glucose

$ Answer The correct answer is B!!! The correct answer is B!!! The light reactions make the ATP and NADPH which supply the energy needed to fuel the Calvin Cycle. The light reactions make the ATP and NADPH which supply the energy needed to fuel the Calvin Cycle.

$15,000 As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin Cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from? As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin Cycle in 1 hour. You find 30,000 molecules of ATP consumed, but only 20,000 molecules of NADPH. Where did the extra ATP molecules come from? A) Photosystem II B) Photosystem I C) Cyclic electron flow D) Noncyclic electron flow E) chlorophyll

$15,000 - Answer The correct answer is C!!! The correct answer is C!!! Cyclic electron flow only makes ATP, while noncyclic flow makes ATP and NADPH. The dark reactions require 9 ATP for every 6 NADPH to make glucose. Cyclic electron flow only makes ATP, while noncyclic flow makes ATP and NADPH. The dark reactions require 9 ATP for every 6 NADPH to make glucose.

$20,000 During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level? During aerobic respiration, which of the following directly donates electrons to the electron transport chain at the lowest energy level? A) NAD+ B) NADH C) ATP D) ADP + P E) FADH 2

$20,000 - Answer The correct answer is E!! The correct answer is E!! FADH 2 donates electrons further down the ETC than NADH. This means the ATP yield for every FADH 2 is only about 2 ATP, as opposed to 3 ATP per molecule of NADH. FADH 2 donates electrons further down the ETC than NADH. This means the ATP yield for every FADH 2 is only about 2 ATP, as opposed to 3 ATP per molecule of NADH.

$25,000 CAM plants can keep stomates closed in daytime, thus reducing the loss of water. They can do this because they: CAM plants can keep stomates closed in daytime, thus reducing the loss of water. They can do this because they: A) Fix CO 2 into organic acids at night B) Fix CO 2 into sugars in the bundle- sheath cells C) Fix CO 2 into pyruvic acid in the mesophyll cells D) Use photosystems I and II at night.

$25,000 - Answer The correct answer is A!! The correct answer is A!! Since the stomates are closed during the day, they cannot take in CO 2 and lose O 2 during the day. Instead, they fix CO 2 at night when it comes in through the stomata. Since the stomates are closed during the day, they cannot take in CO 2 and lose O 2 during the day. Instead, they fix CO 2 at night when it comes in through the stomata.

$36,000 When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs? When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs? A) The pH of the matrix increases B) ATP synthase pumps protons by active transport C) The electrons gain free energy D) The cytochromes of the chain phosphorylate ADP to form ATP E) NAD+ is oxidized

$36,000 - Answer The correct answer is A!! The correct answer is A!! As the H+ are pumped from the inner mitochondrial space through the cristae into the intermembrane matrix between the cristae and the outer mitochondrial membrane, the As the H+ are pumped from the inner mitochondrial space through the cristae into the intermembrane matrix between the cristae and the outer mitochondrial membrane, the

$64,000 If photosynthesizing green algae are provided with CO 2 synthesized with heavy oxygen ( 18 O), later analysis will show that all but one of the following compounds produced by the algae contain the 18 O label. That one exception is: If photosynthesizing green algae are provided with CO 2 synthesized with heavy oxygen ( 18 O), later analysis will show that all but one of the following compounds produced by the algae contain the 18 O label. That one exception is: A) PGA B) PGAL C) Glucose D) RuBP E) O 2

$64,000 - Answer The correct answer is E!! The correct answer is E!! The oxygen in photosynthesis is made from the splitting of water, not from carbon dioxide. The oxygen in photosynthesis is made from the splitting of water, not from carbon dioxide.

$125,000 Which of the following is(are) true of the enzyme ribulose biphosphate carboxylase? Which of the following is(are) true of the enzyme ribulose biphosphate carboxylase? A) It participates in the Calvin Cycle B) It catalyzes a phosphorylation reaction. C) It has an affinity for both O 2 and CO 2 D) A and C are true E) A, B, and C are true

$125,000 - Answer The correct answer is D!! The correct answer is D!! RuBP is necessary for the Calvin Cycle and can accept both oxygen and carbon dioxide as discussed in the process of photorespiration. RuBP is necessary for the Calvin Cycle and can accept both oxygen and carbon dioxide as discussed in the process of photorespiration.

$250,000 When H+ are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is: When H+ are pumped from the mitochondrial matrix across the inner membrane and into the intermembrane space, the result is: A) The reduction of NAD+ B) The restoration of the NA+/K+ balance C) The formation of ATP across the membrane D) The creation of a proton gradient E) The lowering of pH in the mitochondrial matrix

$250,000 - Answer The correct answer is D!! The correct answer is D!! Many H+ gather between the inner membrane and the outer membrane. There are more protons b/w the two membranes and they want to move from high (b/w membranes) to where they are low (in the inner mitochondrial matrix) Many H+ gather between the inner membrane and the outer membrane. There are more protons b/w the two membranes and they want to move from high (b/w membranes) to where they are low (in the inner mitochondrial matrix)

$500,000 All of the following are directly associated with photosystem I except: All of the following are directly associated with photosystem I except: A) Harvesting of light energy by chlorophyll B) P700 C) Photolysis D) Passing electrons down a chain

$500,000 - Answer The correct answer is C!! The correct answer is C!! Photolysis or the splitting of water occurs in non-cyclic electron flow to replaced the electrons lost from Photosystem II. Photolysis or the splitting of water occurs in non-cyclic electron flow to replaced the electrons lost from Photosystem II.

$1,000,000 Glycolysis is believed to be one of the most ancient of metabolic processes. Which statement below least supports this idea? Glycolysis is believed to be one of the most ancient of metabolic processes. Which statement below least supports this idea? A) If run in reverse, glycolysis will build glucose molecules. B) Glycolysis neither uses nor needs O 2 C) Glycolysis is found in all eukaryotic cells. D) The enzymes of glycolysis are found in the cytosol rather than in a membrane- bound organelle. E) Bacteria, the most primitive of cells, make extensive use of glycolysis.

$1,000,000 - Answer The correct answer is A!! The correct answer is A!! Statement A is false and all others statements are true. Glycolysis does not require O 2 so it occurs in aerobic respiration and fermentation. Statement A is false and all others statements are true. Glycolysis does not require O 2 so it occurs in aerobic respiration and fermentation.

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