Question

Part 1: Multiple-choice questions (2 points each) - Which of the following steps or processes in aerobic respiration DIRECTLY consumes molecular oxygen (O2)? a. Glycolysis. b. Oxidative decarboxylation of pyruvate. c. The citric acid cycle. d. Oxidative phosphorylation. Beta-oxidation. 2- Gluconeogenesis is a(n) pathway. a condensation. b. catabolic c.) anabolic d. amphibolic e. photosynthetic 3. Because it is a degradative pathway that also generates biosynthetic precursors, the citric acid cycle is an) pathway. a. condensation. b) catabolic c. anabolic d. amphibolic e. photosynthetic 4. Unlike direct combustion, cellular respiration a. is a stepwise process b. requires multiple low activation energies releases energy gradually, in forms and amounts that are usable All of the above c. None of the above 5. During which phase (s) of glycolysis is energy consumed as ATP? a. Phase 1. Phase 2 c. Phase 3. d. Phases 1 and 2. e. Phases 2 and 3.

Answer 1

Glycolysis Oxidative de carboxylation of pyruvate mocht u These does not processes consume The citric acid cycle Oxidation phosphorylation oxygen directly But for B- oxidation, which transfers the hydrogen to oxygen producing H₂O2 (Hydrogen peroxide) of instead of producing FADH OL OKU 6 Glycolysis is an oxygen independent metabolic pathway The Glycolysis pathway can be seperated into two phases : I. The preparatory phase - wherein Atp is consumed 2. The pay off phase - wherein ATP is produced

@ Gluconeogenesis is an anabolic pathway in this pathway Pyruvate is converted into glucose (i.e; Synthesizes glucose from non-glucose Precursors such as lactate, amino acids and glycerol) ndrų 2 - ③ In Critic acid cycle, the primary pathway is Catabolic Catabolism is a degradative phase of metabolism or which larger ones are converted into Smaller Ci-e; Sugars and fate are broken down into energy I energ YA a down are ino ose wn © During cellular respiration, glucose is broken dou in the presence of oxygen to produce Carbondioxide and water. It is a combustion reaction, it clearly does not resemble one when it occurs in a living organism cell because of the slow release of energy from Series of reactions

Answer 2

correct options are:

1. c

2. c

3. b

4. e

5. b