52) All but which of the following statements are true regarding cell respiratio

Question

52) All but which of the following statements are true regarding cell respiration? a) the reduced form of NAD and FAD carry H'le to the Krebs cycle b) the 2 acetyl groups produced in the transition step enter the Krebs cycle c) the hydrogens liberated during the Krebs cycle are carried to the ETS d) the ATP produced directly in the Krebs cycle are likely used by the cell e) the citric acid formed in the Krebs cycle is catabolized to oxaloacetic acicd 53) Enzymes function primarily by disrupting the chemical structure of a substrate thereby de-stabilizing the molecule which ultimately: a) equilibrates the activation energy required to break down the substrate b) increases the activation energy required to break down the substrate c) prevents the substrate from binding to the inducer d) decreases the activation energy required to break down the substrate e) creates an anabolic reaction producing larger substrate molecules 54) Which of the following choices correctly sequences Koch's Postulates? 1) Microbe must cause the disease when inoculated into a healthy, susceptible organism 2) Microbe must be isolated from second diseased host and grown in pure culture 3) Microbe must always be associated with a given disease 4) Microbe must be isolated from original diseased host and grown in pure culture a) 1,2,3,4 b) 2,3,4,1 c) 3,4,2,1 d) 4.1.3.2 e) 3,4,1,2

Explanation / Answer

52:(d) the ATP produces directly in the kreb cycle are likely used by cell

Reason:The ATP produced in kreb cycle is further used in elecron transport chain for transporting electrons. Oxygen use this elecrons and protons to form water molecule.

53:(d)decreases activation energy required to break down substrate

Reason:when active site of enzyme bind to substrate it causes formation and disruption of bonds and transition state structure is formed and this transition state intermediate is stabilized by lowering of activation energy

54:(e)3,4,1,2

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