Q.1
Respiratory quotient ( R.Q.) is … .. [ kerala 2006]
  • a) Volume of O2 evolved/Volume of CO2 consumed
  • b) Volume of CO2 evolved/Volume of O2 consumed
  • c) Volume of O2 consumed/ Volume of CO2 evolved
  • d) Volume of CO2 consumed/Volume of O2 evolved
Q.2
ATP synthesis proposed by Peter Mitchell is … ..
  • a) Phosphorylation
  • b) Photophosphorylation
  • c) Oxidative phosphorylation
  • d) Chemiosmotic synthesis
Q.3
Enzyme of TCA which is located in in inner mitochondrial membrane in eukaryotes and cytosol in prokaryotes is … .. [ CBSE 2007]
  • a) Lactate dehydrogenase
  • b) Malate dehydrogenase
  • c) Isocitrate dehydrogenase
  • d) Succinate dehydrogenase
Q.4
Which cell does not respire .. ..[ Her PMT 2007]
  • a) RBC
  • b) Sieve tube cell
  • c) Epidermal cell
  • d) Cork cell
Q.5
In which step of Krebs cycle, CO2 is evolved … .. [ AMU 2010]
  • a) Isocitric acid → Oxalosuccinic acid
  • b) Succinic acid → Fumaric acid
  • c) Oxalosuccinic acid → αketoglutaric acid
  • d) Maleic acid → Oxaloacetic acid
Q.6
In anaerobic respiration, 4 molecules of glucose produce … .. [ Guj CET 2008]
  • a) 144 ATP,
  • b) 20 ATP
  • c) 16 ATP
  • d) 8 ATP
Q.7
Calorie is the unit of .. … [ DPMT 2009]
  • a) Sound
  • b) Light
  • c) Heat
  • d) Temperature
Q.8
Reduction of NAD+ does not occur in the reaction … .. [Guj CET 2009]
  • a) Pyruvic acid → Acetyl CoA
  • b) Isocitric acid → α-ketoglutaric acid
  • c) Malic acid → Oxaloacetic acis
  • d) Succinic acid → Fumaric acids
Q.9
Which of the following membrane bound complex in mitochondria is not a proton pump … [ CET Chd 2010]
  • a) Cytochrome b, c
  • b) Cytochrome c oxidase
  • c) NADH dehydrogenase
  • d) Succinate dehydrogenase
Q.10
Which of the following is used as a cellular respiration indicator … [ CET Chd 2010]
  • a) Tetrazolium chloride
  • b) Ethanol
  • c) Schiff’s reagent
  • d) lactic acid
Q.11
ATP does not provide phosphate in the reaction .. ..[ MHTCET 2011]
  • a) Glucose → Glucose 6-P
  • b) Fructose → Fructose 6-P
  • c) PGAL → 1:3-diPGA
  • d) PEPA → Pyruvic acid
Q.12
The reactions of Kerba cycle take place .. ..[ BHU 1991]
  • a) In the cytoplasm
  • b) In ER
  • c) In matrix of mitochondria
  • d) On the surface of mitochondria
Q.13
Enzyme taking part in glycolysis are present in … ..[ MPPMT 1996]
  • a) Mitochondria
  • b) Cytoplasm
  • c) Both mitochondria and cytoplasm
  • d) Vacuole
Q.14
Maximum energy becomes available per mole of glucose when it is metabolized through … ..[ CBSE 1999]
  • a) Glycolysis in skeletal muscle of a sprinter
  • b) Fermentation into ethanol by yeast
  • c) Fermentation into methanol by enteric bacteria
  • d) Aerobic respiration
Q.15
In electron transport system (ETS) which of the following cytochromes reacts with oxygen … [ Kerala 2005]
  • a) Cyt a3
  • b) Cyt b
  • c) Cyt b3
  • d) Cyt b6
Q.16
Overall goal of glycolysis, Krebs cycle and electron transport system is formation of .. .. [ CBSE 2007]
  • a) ATP in small stepwise units
  • b) ATP in one large oxidation reaction
  • c) Sugars
  • d) Nucleic acid
Q.17
Which is wrong about Krebs cycle .. ..[ KCET 2007]
  • a) It occurs in mitochondria
  • b) It starts with 6 carbon compound
  • c) It is also called citric acid cycle
  • d) Glycolysis is lined to it through malic acid
Q.18
3-phosphoglyceraldehyde is oxidized in glycolysis to form … ..[ MHTCET 2008]
  • a) 1,3-biphosphoglycerate
  • b) 3-phosphoglycerate
  • c) 2-phosphoglycerate
  • d) Phosphoenolpyruvate
Q.19
Which of the following respiratory substrate requires highest number of oxygen molecules for its complete oxidation .. ..[ EAMCET 2009]
  • a) Triolein
  • b) Oleic acid
  • c) Tripalmitin
  • d) Tartaric acid
Q.20
R.Q. is less than one if the respiratory substrate is … .[ Manipal 2005]
  • a) Organic acids
  • b) Fats and proteins
  • c) Sucrose
  • d) Glucose
Q.21
R.Q for fatty substance/fat is … ..[ KCET 1999]
  • a) Unity
  • b)Less than one
  • c) Greater than one
  • d) Zero
Q.22
The enzyme which converts glucose to glucose 6-phosphate is .. .. [ MPPMT 1996]
  • a) Phosphorylases
  • b) Glucose-6-phosphatase
  • c) Hexokinase
  • d) Glucose synthetase
Q.23
Raw material of respiration is … ..[ RPMT 1991]
  • a) Glucose and fructose
  • b) Glucose and sucrose
  • c) Glucose + O2
  • d) Glucose + CO2
Q.24
R.Q. is less than one when the respiratory substrate is … ..[ CPMT 1994]
  • a) Sucrose
  • b)Fat
  • c) Glucose
  • d) Organic acid
Q.25
First reduction in pentose phosphate pathway is … ..[ CPMT 1991]
  • a) Oxidation of 6-phosphogluconate
  • b) Oxidation of fructose 6-phosphate
  • c) Oxidation of glucose 6-phosphate
  • d) Oxidation of fructose 5-phosphate
Q.26
Chemiosmotic theory of ATP synthesis in mitochondrion is based on … .. [ KCET 2012]
  • a) K+ gradient
  • b) H+ gradient
  • c) Na+ gradient
  • d) Ca2+ gradient
Q.27
Substrate level phosphorylation in Krebs cycle occurs during conversion of … .. [ kerala 2011]
  • a) Succinate to malate
  • b) Succinyl CoA to Succinate
  • c) Malate to Fumarate
  • d) Malate to oxaloacetate
Q.28
R.Q. for tripalmitin as respiratory substrate is … .. [ HPPMT 2010]
  • a) 0.7
  • b) 1.0
  • c) 0.9
  • d) > 1
Q.29
How many PGAL are produced by glycolysis of three molecules of glucose? How many ATP are released by respiration of these PGAL till formation of CO2 and H2O … .. [ GujCET 2009]
  • a) H2O
  • b) H+
  • c) Electrons
  • d) All the above
Q.30
Chemiosmotic coupling hypothesis of oxidative phosphorylation proposes ATP synthesis because of … …. [ CBSE 2008]
  • a) Proton gradient forms across inner membrane
  • b) Changed impermeability of inner mitochondrial membrane to ADP
  • c) High energy bonds are formed in mitochondrial proteins
  • d) ADP is pumped out of the matrix into intermembrane space
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