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This set of Biology Multiple Choice Questions & Answers (MCQs) focuses on Respiration Set 3

Q1 | Fructose 1,6 biphosphate splits into
  • PGAL and DHAP
  • PGAL and PGA
  • PGAL and BPGA
  • PGA and BPGA.
Q2 | Oxidative phosphorylation occurs in
  • Cytosol
  • Cristae
  • Mitochondrial matrix
  • Endoplasmic reticulum,
Q3 | Malic acid is formed from fumaric acid
  • By addition of CO2
  • By addition of H2O
  • By removal of H2O
  • By removal of CO2
Q4 | If CO2 and 2H are removed from pyruvic acid, it is formed
  • Acetyl co-enzyme A
  • Citric acid
  • Acetate
  • Co-A
Q5 | It is by-product of Kreb’s cycle
  • Oxaloacetic acid
  • Citric acid
  • Acetyl co-enzyme
  • Acetate.
Q6 | One ATP is formed when
  • Succinic acid ? Fumaric acid
  • ?-ketoglutaric acid ? Succinyl CoA
  • Succinyl CoA ?Succinic acid
  • Fumaric acid ? Malic acid.
Q7 | Respiratory quotient and compensation point are
  • Not related
  • Inverse to each other
  • Same
  • Applicable to.all organisms.
Q8 | RQ = l, is
  • The multiplication O2 consumed O2 and released CQ2
  • The amount of O2, consumed and CO2 released are the same
  • One CO2 molecule more released than O2 molecule consumed
  • One O2 molecule more consumed than CO2 molecules released
Q9 | If RQ is 0.7, the substance needs
  • More O2 for respiration
  • Less O2 for respiration
  • O2 is not used for its respiration
  • The substance has more oxygen in its constitution
Q10 | The site of occurrance of all reactions of PPP is
  • Cytosol
  • Mitochondrial matrix
  • Cristae
  • Thylakoid matrix
Q11 | The process occurring during Kreb’s cycle is
  • Decarboxylation and dehydrogenation
  • Decarboxylation, dehydrogenation and phosphorylation
  • Decarboxylation and phosphorylation
  • Dehydrogenation and phosphorylation
Q12 | During glycolysis water is released from
  • 2, Phospoglyceric acid
  • Biphosphoglyceric acid
  • Phosphoenol pyruvic acid
  • Phosphoglyceraldehyde
Q13 | When human muscle contracts :
  • Respiration does not occur
  • Anaerobic respiration occurs, if supply of oxygen is insufficient
  • Anaerobic respiration never occurs
  • Always anaerobic respiration occurs.
Q14 | The correct sequence of the three processes of aerobic respiration is
  • Glycolysis, Kreb’s cycle, oxidative phosphorylation.
  • Glycolysis, oxidative phosphorylation and Kreb’s cycle
  • Kreb’s cycle, glycolysis and oxidative phosphorylation
  • oxidative phosphorylation, Kreb’s cycle, glycolysis
Q15 | During PPP, RuBP is formed in
  • Mitochondria
  • Cytosol
  • Stroma
  • Chloroplas
Q16 | The number of ATP molecules formed in oxidative phosphorylation of one glucose molecule
  • 6
  • 14
  • 28
  • 34
Q17 | The number of ATP molecules formed in oxidative phosphorylation of 1 pyruvic acid
  • 6
  • 14
  • 28
  • 34
Q18 | How much energy spent in transport of one pyruvic acid to mitochondrion ?
  • Energy of 1 ATP
  • No energy
  • Energy of 2 ATP
  • Not certain
Q19 | In anaerobic respiration in plants (CM.C 1983, CPM.T. 1992)
  • Oxygen is absorbed
  • Oxygen is released
  • Carbon dioxide is released
  • Carbon dioxide is absorbed.
Q20 | Krebs cycle takes place in (CPMT. 1985, 1999, M.P.P.M.T. 1997, AMU. 2000, AFMC 2002, RPMT. 2005)
  • Vesicles of E.R
  • Mitochondria
  • Dictyosomes
  • Chloroplasts.
Q21 | By ETS, ATP-synthesis occurs on the (A.I.I.M.S. 1984)
  • Outer membrane of mitochondrion
  • Inner membrane of mitochondrion
  • Matrix
  • None of the above
Q22 | Energy currency (reservoir) of the cells is (BHU 1984, Kerala 2001, AMU 2003, MPPMT 2002)
  • AMP
  • ATP
  • RNA
  • DNA
Q23 | Complete oxidation of glucose into pyruvic acid with several intermediate steps is known as (C.B.S.E. 1988;B.H.U. 1986,1989)
  • TCA-pathway
  • Glycolysis
  • HMS-pathway
  • Krebs cycle
Q24 | When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is(RPMT. 1985 BHU. 1985)
  • Loss of 3 ATP molecule
  • Loss of 6 ATP molecules
  • Gain of 2 ATP molecules
  • Gain of 4 ATP molecules
Q25 | Conversion of pyruvic acid into ethyl alcohol is facilitated by the enzyme (AMU. 1986)
  • Decarboxylase
  • Dehydrogenase
  • Decarboxylase and dehydrogenase
  • Phosphotase