Question

In Krebs cycle, FAD participates as electron acceptor during the conversion of _____
(a) Succinyl Co.A to succinic acid
(b) Fumaric acid to malic acid
(c) Succinic acid to fumaric acid
(d) Malic acid to oxaloacetic acid

Answer 1

(a) Succinyl Co.A to succinic acid

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Answer 2

Dear Student,

◆ Answer - (c)

In Krebs cycle, FAD participates as electron acceptor during the conversion of succinic acid to fumaric acid.

● Explanation -

• During this step, succinate is converted to fumarate.
• FAD acts as electron acceptor to form FADH2.
• The reaction takes place in presence of succinate dehydrogenase.

◆ Extra information -

● Krebs cycle -

• Krebs cycle is common pathway for oxidation of carbohydrates, proteins & fatty acids.
• Also known as Citric Acid cycle or Tricarboxylic Acid (TCA) cycle.
• It takes place in mitochondria.

# Substrates entered -

• 1 acetyl CoA
• 2 oxaloacetate
• 6 NAD+
• 2 FAD+
• 2 ADP

# Products produced -

• 4 CO2
• 6 NADH
• 2 FADH2
• 2 ATP

Thanks dear. Hope this helps you...