During the process of nutrition, the first step is the break-down of glucose into a pyruvate in the cytoplasm. Further, the pyruvate may be converted into ethanol and CO2 (anaerobic respiration). Breakdown of pyruvate into 3- molecules of CO2 using oxygen (aerobic respiration) releases a lot greater energy than in the anaerobic process. When there is a lack of oxygen, pyruvate is converted into lactic acid. ATP, after the energy released during cellular respiration, is synthesised and it drives the endothermic reactions taking place in the cell. I. ATP molecule is made from a) ADP b) IADP c) GADP d) Nucleotide with 3 phosphates II. Energy equivalent to ......... is released when an ATP molecule is broken a) 15 kJ/mol b) 30 kJ/mol c) 45 kJ/mol d) 65 kJ/mol III. How many carbons are there in a pyruvate molecule? a) 6 b) 5 c) 4 d) 3 IV. An example of micro-organism where pyruvate is converted into C2H5OH and CO2 during fermentation is: a) Bacteria b) Algae c) Yeast d) None V. Breakdown of pyruvate into CO2 using oxygen takes place in: a) Golgi bodies b) Mitochondria c) Centrosomes d) None