Review the image(s) and answer the following questions.

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1		What will happen to this biochemical pathway if a metabolic disorder prevents the cell from manufacturing enzyme 3?
			A)	The pathway will skip the missing enzyme and continue as before.
			B)	The pathway will stop at the point of the missing enzyme, and the amount of an intermediate product will accumulate.
			C)	The two enzymes adjacent to the missing enzyme will take over its duties and keep the metabolic pathway going.
			D)	An alternate metabolic pathway will produce the same product for the cell.
2		Select the statement that is not true about this biochemical pathway.
			A)	Each enzyme in the pathway acts on the product of the previous stage.
			B)	The enzymes must act in the sequence shown.
			C)	The rate of the pathway is limited by the speed of the rate-limiting enzyme.
			D)	Each enzyme in the pathway can act on the original substrate.

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3		Why is the analogy of a downhill bucket brigade used to represent the electron transport system?
			A)	This analogy illustrates the movement of water within the electron transport chain.
			B)	This analogy represents diffusion, such as occurs through the cristae of the mitochondria.
			C)	Each electron carrier is alternately reduced and oxidized, as if the electron were a bucket being passed down the bucket brigade.
			D)	The bucket brigade represents the energy used during the electron transport system.
4		What is the final electron acceptor in the electron transport system?
			A)	cytochrome complex 3
			B)	cytochrome complex 4
			C)	oxygen
			D)	water

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5		During ATP synthesis, what is occurring at step 2?
			A)	Protons are diffusing inward, driving the synthesis of ATP.
			B)	Water is moving toward the intermembrane space.
			C)	Electrons are providing energy to pump protons across the membrane.
			D)	The channel proteins are closing.
6		During ATP synthesis, what us taking place at step 4?
			A)	Water is moving toward the intermembrane space.
			B)	Protons are diffusing inward, driving the synthesis of ATP.
			C)	The channel proteins are closing.
			D)	Electrons are providing energy to pump protons across the membrane.

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7		How many molecules of ATP (net) are yielded via substrate-level phosphorylation during glycolysis?
			A)	2
			B)	4
			C)	6
			D)	10
8		How many molecules of ATP are generated through the electron carriers during glycolysis, the transition reaction, and Krebs cycle combined?
			A)	36
			B)	32
			C)	26
			D)	28