Respiration Questions, Paper 09, Subject: Biology, Topic: Respiration, Type: MCQs (Multiple Choice Questions)
| 1. | The energy yield as a result of total oxidation of one molecule of glucose during cellular respiration is sufficient to convert (Karnataka CET 1998) (a) 30 molecules of ADP to 30 molecules of ATP (b) 32 molecules of ADP to 32 molecules of ATP (c) 36 molecules of ADP to 36 molecules of ATP (d) 38 molecules of ADP to 38 molecules of ATP Answer: (c) |
| 2. | The enzyme which converts glucose to glucose 6-phosphate is (a) Phosphorylase (b) Glucose- 6- phosphatase (c) Hexokinase (d) Glucose synthetase Answer: (c) |
| 3. | The enzymes which take part in glycolysis are found in (PM PMT 1996) (a) Mitochondria (b) Cytoplasm (c) Mitochondria and cytoplasm (d) Vacuoles Answer: (b) |
| 4. | The formation of acetyl coenzyme-A from pyruvic acid is the result of its (CPMT 1990) (a) Reduction (b) Dehydration (c) Dephosphorylation (d) Oxidative decarboxylation Answer: (d) |
| 5. | The glycolate metabolism occurs in (MP PMT 1995) (a) Lysosomes (b) Ribosomes (c) Glyoxysomes (d) Peroxisomes Answer: (d) |
| 6. | The importance Krebs cycle is in the production of (MP PMT 1996) (a) Acetyl CoA (b) Water (c) ATP (d) ADP Answer: (c) |
| 7. | The last of terminal cytochrome in respiratory chain is (CBSE 1992; Rajasthan PMT 1997) (a) Cyt b (b) Cyt a3 (c) Cyt a1 (d) Cyt c Answer: (b) |
| 8. | The maximum potential difference between the electron carries required for ATP synthesis is (a) 0.05 ev (b) 0.15 ev (c) 0.27 ev (d) 0.45 ev Answer: (c) |
| 9. | The membrane bound enzyme involved in Krebs cycle is (AIIMS 1994) (a) Malate dehydrogenase (b) Fumarase (c) Cis acotinase (d) Succinic dehydgenase Answer: (d) |
| 10. | The net gain of energy from one gram mole of glucose during aerobic respiration is (a) 2 ATP (b) 4 ATP (c) 38 ATP (d) 40 ATP Answer: (c) |
| 11. | The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is (a) 1 (b) 2 (c) 3 (d) 4 Answer: (b) |
| 12. | The plants similar to animals in their requirement of oxygen for cellular respiration belong to (a) Red algae (b) Blue-green algae (c) Fungi (d) Lichens Answer: (c) |
| 13. | The pyruvic acid formed in Glycolysis is oxidised to CO2 and H2O in a cycle called (MP PMT 1999) (a) Calvin cycle (b) Hill reaction (c) Krebs (d) Nitrogen cycle Answer: (c) |
| 14. | The R.Q. (Respiratory quotient) of C39 H72 O6 is (CPMT 1992) (a) 2.71 (b) 1.32 (c) 0.72 (d) 3.250 Answer: (c) |
| 15. | The rate of respiration of young maturing seeds is quite high but as water content decreases during further maturation, respiration (Delhi PMT 1986) (a) Remains high (b) Stops completely (c) Increases steadily (d) Decreases steadily Answer: (d) |
| 16. | The reactions of Krebs cycle take place (a) In the cytoplasm (b) In ER (c) In matrix of mitochondria (d) On the surface of mitochondria Answer: (d) |
| 17. | The tissue of highest respiratory activity is (a) Meristems (b) Ground tissue (c) Phloem (d) Mechanical tissue Answer: (a) |
| 18. | What is produced when succinyl CoA is changed to succinate? (a) ATP (b) GTP (c) CTP (d) ATP in plants and GTP in animals Answer: (d) |
| 19. | What is the other name of glycolysis. (PM PMT 1986; CET Pune 1998; CPMT 1998) (a) EMP pathway (b) TCA pathway (c) HMS pathway (d) None of the above Answer: (a) |
| 20. | When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is (a) Loss of 3 ATP , molecules (b) Loss of 6 ATP , molecules (c) Gain of 2 ATP , molecules (d) Gain of 4 ATP , molecules Answer: (a) |