20-Which of the following fatty acids will produce the MOST amount of enengy upo
ID: 217512 • Letter: 2
Question
20-Which of the following fatty acids will produce the MOST amount of enengy upon complee oxidation to CO, and HO? CH-CH-CHa-CH-CH-CH-CH-CH-CH-COOH CH-CH-CH-CH-CH-CH-CH-CH-CH:-COOH CHi-CH-CH-CH-CH CH-CH-CH-CH-COOH CHi-CH-CH-CH-CHa-CH-CH-COOH e- CHCH-CH-CH-CH-CH-CH-CH-CH-COOH 21- Which of the following fatty acids will produce the LEAST amount of eneng upon complete oxidation to CO, and H0 a- CH-CH-CH-CH-CH-CH-CH-CH-CH-COOH b-CH.??-01-01-01-01-01-01-01:001. c CH-CH-CH-CH-CH-CH-CH-CH-CH-COOH CH-CH-CH-CH-CH-CH-CH-COOH CH-CH-CH-CH-CH-CH-CH-CH-CH-COOH 22- Which of the following is the correct yield in ATP and reduced cony mes for one nound of the citric acid cycle? a INADH 1FADH+ATP b3NADH IFHAD, 1ATP ?. INADI1+ IFADH,+3???. d. 3NADI1+3FADH: + ????. e. None of the above 23- Which of the following enrymes generates high-energy electrons in form of FADH? b. a-ketoglutarate dehydrogenase d. Malate dehydrogenase e. Pyruvate dehydrogenase 24- Which type of energy conversion takes place on the inner mitocbondrial membrane? a. Phontonschemical bond eneng b. High-energy electrons ? highenergy phapho bonds. c. Heat ? chemical bond energy. d. Phontons+ heat c. All of the above 25- During electron transfer, electron carriers function in a sequence dictated by a. Their respective b. Their overall charge. c. Their standard roduction potentials d. Their size c. None of the above. 26- During oxidative phosphorylation in a cularyotic cell, the peotons that are pumped as coenrymes are being oxidized initially accumulate a. In the extracellular space b. In the plasma membeane c In the intermembrane space. d. In the inner mitochondrial membrane e. In the mitochondrial matrixExplanation / Answer
?20. ans B. This is because staurated fats yield more energy than unsaturated fats (fats containing double bonds)
21. ans E. Unsaturated fats require more energy to break down and so the energy that is available at the end of the reaction consequently becomes less.
22. ans D. Each round of the citric acid cycle generates 3NADH, 1 FADH2 (not FHAD2) and 1 ATP equivalent in the form of GTP.
23. ans C. Succinate dehydrogenase oxidises succinate to fumarate producing FADH2.
24. ans B. The inner mitochondrial membrane contains proteins of the electron transport chain (ETC) through which high energy electrions are transported from one protein complex to the next which results in ATP synthesis.
25. ans C. The unidirectional flow of electrons from NADH to oxygen across the electron transport carriers occurs because of their increasing redox potential or increasing affinity for electrons. That is the electron carriers are arranged in order from most negative redox potential (least affinity for electrons) to most positive redox potential (highest affinity of electrons).
26. ans C. The protons are pumped from the matrix into the intermembrane space by the ETC protein complexes. This concentration gradient of protons is then used by ATP synthase to generate ATP from ADP.
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