During oxidation within a cell, all the energy contained in respiratory substrates:
 
  • is released free into the cell
  • is released in a single step
  • is released in a series of slow step-wise reactions
  • gets converted to usable energy
In glycolysis, which of the following conversions is an energy yielding process?
 
  • Glucose to Glucose-6-phosphate
  • Fructose-6-phosphate to Fructose 1,6- biphopshate
  • BPGA to 3-phosphoglyceric acid
  • 3-phosphoglyceric acid to 2-phosphoglycerate
The names for Complex III and Complex IV in the mitochondrial electron transport chain respectively are:
 
  • NADH dehydrogenase and Succinic dehydrogenase
  • NADH dehydrogenase and ATP synthase
  • Cytochrome bc1 and Cytochrome c oxidase
  • Cytochrome bc1 and Cytochrome b6f
What is incorrect about CF0 part of ATP synthase?
 
  • It is embedded in the thylakoid membrane
  • It forms a transmembrane channel
  • It carries out facilitated diffusion of protons
  • It protrudes on the outer surface of the thylakoid membrane on the side that faces the stroma
The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration is called as the respiratory quotient [RQ]. Calculate RQ when albumin is used as a respiratory substrate[see the given equation]:
C77H112N2O22S + 77O2 → 63 CO2 + 38 H2O + SO2 + 9 CO(NH2)2
 
  • 0.70
  • 0.82
  • 0.90
  • 1.00
In the tricarboxylic acid cycle, what are the respective numbers for – decarboxylation steps, substrate level phosphorylation and points at which FADH2 is produced [calculate for oxidation of one molecule of pyruvic acid]? 
 
  • 3, 2 and 1
  • 2, 1 and 1
  • 3, 1 and 2
  • 2, 2 and 2
During glycolysis in plant cells, the enzyme hexokinase catalyzes the phosphorylation of:
I. Glucose
II. Fructose
 
  • Only I
  • Only II
  • Both I and II
  • Neither I nor II
The number of carbon atoms in all the following molecules is 4 except in:
 
  • α ketoglutaric acid
  • Oxaloacetic acid
  • Succinic acid
  • Malic acid
An energy yielding step in glycolysis is:
  • phosphorylation of glucose
  • splitting of fructose 1,6-biphosphate
  • phosphorylation of fructose-6-phosphate     
  • conversion of BPGA to 3-phosphoglyceric acid
In the mitochondrial electron transport system, ubiquinone receives reducing equivalents via:
  • Both Complex I and Complex II
  • Complex III
  • Complex IV
  • Complex V
The number of carbon atoms are 3 in all of the following molecules except:
  • Dihydroxyacetone phosphate
  • Glyceraldehyde 3-phosphate
  • Acetyl CoA
  • Pyruvic acid
Fermentation is not a waste but it serves an important purpose which is:
  • Regeneration of NAD +
  • Formation of large number of ATP
  • Evolution of oxygen
  • Complete oxidation of pyruvic acid
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