Mitochondria are called the powerhouses of the cell. Which of the following observations support this statement?
  • 13
  • 19
  • 12
  • 31
Which of the following is essential for the conversion of pyruvic acid to acetyl CoA?
  • Mitochondria are found in almost all plant and animal cells.
  • The enzymes of the Krebs cycle and the cytochromes are found in mitochondria.
  • Mitochondria synthesise ATP.
  • Mitochondria have a double membrane.
The TCA cycle is named after
  • ATP
  • TPP
  • LAA
  • NAD
In which of the following do the two names refer to one and the same thing?
  • Robert Emerson
  • Melvin Calvin
  • Embden
  • Hans Krebs
Pyruvic acid, the key product of glycolysis, can have many metabolic fates. Under aerobic conditions, it forms
  • Krebs cycle and Calvin cycle
  • Citric acid cycle and Calvin cycle
  • Tricarboxylic acid cycle and citric acid cycle
  • Tricarboxylic acid cycle and urea cycle
End-product of citric acid/Krebs cycle is
  • CO2
  • CO2+ H2O
  • Lactic acid
  • Acetyl CoA + CO2
Choose the correct statement.
  • Citric acid
  • CO2 + H2O
  • Lactic acid
  • Pyruvic acid
Which of the following is the key intermediate compound linking glycolysis to the Krebs cycle?
  • There is a complete breakdown of glucose during fermentation.
  • Pyruvate is formed in the mitochondrial matrix.
  • During the conversion of succinyl CoA to succinic acid, a molecule of ATP is synthesised.
  • Oxygen is vital in respiration for the removal of hydrogen.
Which of the following is not correct about the Krebs cycle?
  • ATP
  • Malic acid
  • Acetyl CoA
  • NADH
Most of the enzymes of the TCA cycle are present in
  • It starts with a six-carbon compound.
  • It occurs in mitochondria.
  • It is also called the citric acid cycle.
  • The intermediate compound which links glycolysis with the Krebs cycle is malic acid.
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