Q.1
The first stable compound of Krebs cycle is … ..
  • a) Acetyl CoA
  • b) Citric acid
  • c) Oxaloacetic acid
  • d) Fumaric acid
Q.2
After glycolysis, fat of glucose in mitochondrial matrix is … .. [ AIIMS 2011]
  • a) Hydrolysis
  • b)Oxidative decarboxylation
  • c) Reduction
  • d) Oxidation
Q.3
Oxidative decarboxylation occurs during the reaction … .. [ MHTCET 2010]
  • a) Citrate → Isocitrate
  • b) Pyruvic acid → Acetyl CoA
  • c) Succinate → Fumarate
  • d) Fumarate → Malate
Q.4
Oxalosuccinic acid, a transient intermediary compound of Krebs cycle is … .. [ KCET 2008]
  • a) 4-carbon compound
  • b) 5-carbon compound
  • c) 6-carbon compound
  • d) 3-carbon compound
Q.5
How much usable energy is available during oxidative combustion of 1 gm mole of glucose in the body ? [ RPMT 1996]
  • a) 686000 cal
  • b) 304000 cal
  • c) 277400 cal
  • d) 686 cal
Q.6
R.Q. is one in case of .. … [ JKCMEE 2008]
  • a) Fatty acids
  • b) Carbohydrates
  • c) Nucleic acid
  • d) Organic acids
Q.7
Pyruvate dehydrogenase complex needed for conversion of pyruvic acid to acetyl CoA is located in … .. [ KCET 2010]
  • a) Intermembrane space
  • b) Cytoplasm
  • c) Matrix of mitochondria
  • d) Grana of chloroplast
Q.8
Chemiosmosis was first described by … .. [ CET Chd. 2010]
  • a) Boyer
  • b) Walker
  • c) Mitchell
  • d) Miescher
Q.9
Select the wrong statement .. …. [ kerala 2011]
  • a) RQ is 0.7 with tripalmitin
  • b) Link compound between glycolysis and Krebs cycle is malic acid
  • c) 36 ATP molecules are produced per glucose molecules in aerobic respiration
  • d) 2 ATP molecules are produced per glucose molecule in anaerobic respiration
Q.10
Glycolysis … .. [ DPMT 2011]
  • a) Occurs in mitochondria
  • b) Has no connection with ETC
  • c) Reduces 2 molecules of NAD+ per glucose
  • d) Produces no ATP
Q.11
In ETC, first ATP is formed when hydrogen passes from … …
  • a) FMN and NAD
  • b) FMN to CoQ
  • c) NAD to FMN
  • d) NAD to CoQ
Q.12
A value of RQ less than one means .. ..[ kerala 2008]
  • a) Carbohydrates are used as respiratory material
  • b) Organic acids are used as respiratory substance
  • c) Oxidation of respiratory substrate consume more O2 than CO2released.
  • d) Oxidation of respiratory substrate consumes less O2 than CO2 released
Q.13
Pyruvic dehydrogenase is used in converting .. …
  • a) Pyruvic acid to acetyl co-enzyme A
  • b) Pyruvate to glucose
  • c) Glucose to pyruvate
  • d) Pyruvic acid to lactic acid
Q.14
Carbon dioxide is liberated during … ..[ MPPMT 2004]
  • a) Photosynthesis
  • b) Respiration
  • c) Transpiration
  • d) Ascent of sap
Q.15
End products of aerobic respiration are … ..[ CBSE 1992]
  • a) Sugar and oxygen
  • b) Water and energy
  • c) Carbon dioxide, water and energy
  • d) Carbon dioxide and energy
Q.16
NADH of glycolysis reacts with an inorganic element during liberation of energy. The respiration is … … [ RPMT 1992]
  • a) Photorespiration
  • b) Germination
  • c) Aerobic respiration
  • d) Anaerobic respiration
Q.17
Number of NADH produced during breakdown of one molecule of glucose to 1:3 diphosphoglycerate stage is … .. [ AMU 1993]
  • a) 6
  • b) 4
  • c) 3
  • d) 2
Q.18
Fructose 1:6 biphosphate split into two triose phosphates by enzyme ….
  • a) Aldolase
  • b)Amylase
  • c) Zymase
  • d) Lipase
Q.19
Conversion of sugar into alcohol during fermentation is due to direct action of … .. [ AMU 1998]
  • a) Temperature
  • b) Concentration of sugar
  • c) Zymase
  • d) Microorganisms
Q.20
Anaerobic respiration of animals/humans produces … ..[ AFMC 2002]
  • a) Glucose and O2
  • b) C2H5OH and CO2
  • c) Lactic acid and water
  • d) CO2 and H2O
Q.21
Green plant kept in light produce ATP from glucose. The process is … .. [ JKCMEE 2000]
  • a) Photophosphorylation
  • b) Glycolysis
  • c) TCA cycle
  • d) Oxidative phosphorylation
Q.22
Metabolism of one palmitic acid yields ATP … ..[ CBSE 2000
  • a) 36 ATP
  • b) 56 ATP
  • c) 129 ATP
  • d) 48 ATP
Q.23
A sudden change from anaerobic to aerobic process produces … .[ KCET 2001]
  • a) Pasteur effect
  • b) Emerson effect
  • c) Blackman’s law
  • d) Chargaff’s rule
Q.24
Sequence of organic acids in Krebs cycle is .. … [ MHTCET 2001]
  • a) Citric acid → oxalosuccinic acid → isocitric acid
  • b) Citric acid → isocitric acid → oxalosuccinic acid
  • c) Isocitric acid → oxalosuccinic acid → Citric acid
  • d) Oxalosuccinic acid → isocitric acid → citric acid
Q.25
Which one requires oxygen … ..[ AMU 2003]
  • a) fermentation
  • b) EMP pathway
  • c) Pentose phosphate pathway
  • d) None of the above
Q.26
Krebs cycle starts with the formation of six carbon compound by reaction between … ..[ CPMT 2000]
  • a) Malic acid and acetyl CoA
  • b) Succinic acid and pyruvic acid
  • c) Fumaric acid and pyruvic acid
  • d) Oxalic-acetic acid and acetyl CoA
Q.27
R.Q of protein rich pulses/Pisum sativum is … ..
  • a) Unity
  • b) Infinity
  • c) More than unity
  • d) Less than one
Q.28
Metabolic water is the one … .. [ CPMT 1992]
  • a) Used during transamination
  • b) Used during photosynthesis
  • c) Produced during aerobic utilization of glucose
  • d) Produced during condensation or polymerization
Q.29
Krebs cycle is component of … .. [ AFMC 1996]
  • a) Photosynthesis
  • b) Aerobic respiration
  • c) Anaerobic respiration
  • d) Photorespiration
Q.30
Energy required to form glucose from pyruvate is equivalent to … .. [ RPMT 1998]
  • a) 32 ATP
  • b) 16 ATP
  • c) 8 ATP
  • d) 4 ATP
0 h : 0 m : 1 s