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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