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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Respiration Set 5
Q1 | Oxidation of a molecule of acetyl CoA produces (RPMT. 1990)
- 12 ATP
- 15 ATP
- 6 ATP
- 19 ATP
Q2 | Maximum amount of energy/ATP is liberated on oxidation of (AFMC 1984, 1988; CPMT. 1988; CB.S.E. 1994; AMU 1996)
- Fat
- Proteins
- Starch
- Vitamins
Q3 | R.Q. is ratio of ; (C.B.S.E.’1990;A.P.M.E.E. 1999, Glijarat GET Q.B.)
- CO2 produced to substrate consumed
- CO2 produced to O2 consumed
- Oxygen consumed to water produced
- Oxygen consumed to CO2 produced
Q4 | Connecting link between glycolysis and Krebs cycle is/before entering Krebs cycle pyruvate is changed to (A.F.M.C, 1988; CB.S.E. 1992, 1997; R.PMT. 1992; M.P.P.M.T. 1987, 88, 93, 98, 2001, 2002; AMU. 1987, 2001; J.LPME.R; 1989; C.PMT. 1991, 94; D.P.M.T. 1999; A.UMS. 1994, Mampal 200l, BV. 2002, Kerala 2003, 2004)
- Oxaloacetate
- PEP
- Pyruvate
- Acetyl CoA
Q5 | Apparatus to measure rate of respiration and R.Q. is (C.P.M.T. 1991; C.B.S.E. 1992)
- Auxanometer
- Potometer
- Respirometer
- Manometer
Q6 | Terminal cytochrome of respiratory chain which donates electrons to oxygen is (CPMT 1989; CBSE, 1992)
- Cyt b
- Cyt c
- Cyt a
- Cyt a3
Q7 | R.Q. is maximum when respiratory substrate is (MPPMT. 1992; A.U.M.S. 1992)
- Glucose
- Fat
- Protein
- Malic acid.
Q8 | End product of citric add/Krebs cycle is (CBSE. 1993; Har. P.M.T. 1994)
- Citric acid
- Lactic acid
- Pyruvic acid
- CO2 + H2O
Q9 | Krebs cycle is (AMU. 1993)
- Oxidation of glucose to alcohol and water
- Oxidation of acetyl CoA to carbon dioxide and water involving electron transport
- Complete oxidation of acetyl CoA without electron transport
- Complete reduction of acetyl CoA to carbon dioxide and water.
Q10 | Most of the biological energy is supplied by mitochondria through (M.P.PMT.1994, AMU. 1998)
- Breaking of protein
- Reduction NADP+
- Breaking of sugars
- Oxidising TCA substrates.
Q11 | Which one is a product of glycolysis, besides 2 ATP ? (CPMT. 1995; M.P.PMT. 1998)
- FAD
- NADH
- NAD
- NADP
Q12 | The site of Krebs cycle in bacteria is (Bihar P.M.T. 1995)
- Nucleoid
- Cytoplasm
- Plasma membrane
- Ribosomes
Q13 | Which is the product of aerobic respiration? (A.F.M.C 1995)
- Malic acid
- Ethyl alcohol
- Lactic acid
- Pyruvic acid
Q14 | Which one can respire in the absence of oxygen ? (R.P.M.T. 1996)
- Seed
- Leaves
- Stem
- Root
Q15 | Lactic acid fermentation does not produce (A.UMS. 1996; Pb. P.M.T. 1997; AMU. 1999)
- ATP
- CO2 and NADH
- CO2
- NADH
Q16 | Electron transport system of mitochondria is located in (M.P.PMT. 1997, CPMT. 1999, R.PMT.2000)
- Outer membrane
- Inner membrane
- Inter-cristal space
- Outer chamber.
Q17 | In bacteria the site for respiration is (CB.S.E. 1997)
- Cytoplasm
- Mesosome
- Episome
- Plasmid
Q18 | Which is wrong about cytochrome P-450 ? (C.B.S.E. 1998)
- Contains iron
- Is a coloured cell
- Is an enzyme
- Plays an important role in metabolism.
Q19 | Production of alcohol by Yeast fermentation is ....... process (Pb. P.M.T. 1998)
- Anaerobic
- Aerobic
- Light dependent
- Both A and C.
Q20 | In glycolysis, enzyme enolasc produces (AM.U. 1999)
- Phosphoglyceric acid
- Phosphoenol pyruvate
- Phosphoglyceraldehyde
- Pyruvate
Q21 | Oxygen is reduced to water in (Kerala 2000,2006)
- Fermentation
- Calvin cycle
- Electron transport
- Krebs cycle
Q22 | Cytochrome is (C.B.S.E. 2001)
- Metalloflavoprotein
- Fe-containing porphyrin pigment
- Lipid
- Glycoprotein
Q23 | Isocitric acid is changed to ?-oxalosucinic acid by (Tamil.Nadu2001)
- Oxidative carboxylation
- Oxidative decarboxylation
- Dehydrogenation
- Hydrogenation and decarboxylation.
Q24 | In respiration (Manipal 2002)
- 2 PGAL are formed in glycolysis and none in Krebs cycle
- 6 PGAL in glycolysis, 3 PGAL in Krebs cycle
- 8 PGAL in glycolysis, 3 PGAL in Krebs cycle
- PGAL formation does not occur in respiration.
Q25 | Glycolysis takes place in (A.F.M.C 2003)
- All cell
- Only eukaryotic cells
- Muscle cells
- Nerve cells