SOLVED

31) Isopentenyl pyrophosphate is the precursor for which of the following? A) Terpenes. B) Vitamin K. C) Quinones. D) All of the above. E) None of the above. 32) Which lipid form is transported across the inner mitochondrial membrane before β-oxidation? A) Acylcarnitine. B) Fatty acyl CoA. C) Acetoacetyl CoA. D) Lysophospholipid CoA. 33) What structure is shown below and what is its main function? A) Coenzyme A; activation of fatty acids before β-oxidation. B) Carnitine; transport of fatty acyl CoA into the mitochondrial matrix. C) Taurocholate; one of the bile salts. D) Acetoacetate; synthesis of fatty acids. 34) Fatty acids are oxidized in the ________. A) mitochondrial matrix B) cytosol C) endoplasmic reticulum D) mitochondrial inner membrane space 35) There are four steps in the β-oxidation pathway. Some reaction types are listed below. Give the proper reaction types in the order that they occur in the β-oxidation pathway. 1.condensation 2.oxidation 3.reduction 4.thiolysis 5.hydration 6.phosphorylation 7.rearrangement A) 1, 7, 2, 2 B) 6, 3, 4, 2 C) 1, 2, 3, 5 D) 2, 5, 2, 4 36) Which of the following is a true statement for fatty acid oxidation? A) It occurs in the cytosol. B) Oxidation requires a three carbon substrate, which transfers a two-carbon unit to the chain. C) Both NADH and QH2 are produced. D) None of the above. 37) If the carbonyl carbon of a fatty acyl CoA molecule with a C10 chain is labeled with 14C, how many rounds of β-oxidation are required to produce a radioactively labeled acetyl CoA? A) One B) Two C) Four D) Five 38) How many cycles of β-oxidation are required to completely process a saturated C18 fatty acid? A) 6 B) 8 C) 9 D) 18 39) A trifunctional enzyme for β-oxidation containing sites for activities for an entire pathway is an example of A) cooperative control. B) metabolic channeling. C) energy loss. D) separation of biosynthetic and degradation pathways. 40) Which enzyme is needed for the oxidation of odd-chain saturated fatty acids that is not needed for even-chain fatty acids? A) Methylmalonyl-CoA mutase. B) Propionyl-CoA carboxylase. C) Methylmalonyl-CoA racemase. D) All of the above.