Question
What kind of interaction is NOT involved in the binding of a substrate to a normally functioning enzyme? a. H bonds b. ionic bonds c a transient covalent bond d. a permanent covalent bond e. hydrophobic interactions (Which one is FALSE) The transition state during an enzymatic reaction a. Eliminates the energy of activation (E_A) for a specific chemical reaction b. Refers to chemical changes in the substrate c Results from the binding of substrate and enzyme d. Is formed within the catalytic site e. Is transitory (short-lived) Mitochondria are produced by fission from preexisting mitochondria. a. True b. False From an evolutionary point of view, mitochondria appear to be derived from a. Eukaryotes b. Bacteria c. Gene duplication d. Extraterrestrial life e. ATP synthase Which is an integral protein in the inner mitochondrial membrane? a. Pyruvate b. NADH c. ATP synthase d. ATP e. Phosphofructokinase This molecule holds most of the energy at the end of glycolysis? a. coenzyme A b. pyruvate c. NADH d fatty acids e. ADP What molecule is responsible for conveying 2 carbons from pyruvate to the Krebs cycle? a. Coenzyme Q b. Coenzyme A c. Acetate d. ATP e. oxaloacetate Which is NOT involved with electron transport during respiration? a. NADH dehydrogenase b. Cytochrome bc1 c. Succinate dehydrogenase d. Glucokinase e. Cytochrome c oxidase Where are most of the enzymes of the Krebs cycle located? a. in the intermembrane or intercristal space b. on the cristae c. on the ribosomes d. in the mitochondrial matrix e. In the extracellular space.
Explanation / Answer
Ans.)
13.) “a”
(It is true that mitochondria evolved from pre-existing mitochondria by binary fission.)
14.) “b”
(Mitochondria are derived from bacteria and endured endocytosis.)
15.) “c”
(ATP synthase is integral protein preset at the inner mitochondrial membrane.)
16.) “b”
(Pyruvate is the end product of glycolysis and has lots of extractable energy.)
17.) “b”
(Coenzyme A helps pyruvate to lose two carbon molecules in Kreb’s cycle.)
18.) “d”
(Glucokinase is not involved in electron transport chain. It involves in phosphorylation of glucose to glucose-6-phosphate during glycolysis.)
19.) “d”
(Most of the enzymes of Kreb’s cycle are located in mitochondrial matrix space.)
