Question

Why kreb cycle is called TCA cycle

Answer 1

Kreb's cycle is called tricarboxylic acid cycle because the citric acid is both the first product and final product which contains three carboxyl groups.
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Answer 2

Dear Student,

◆ Kreb cycle is called TCA cycle because -

• First step in Krebs cycle is formation of citric acid from acetyl Co-A and oxaloacetate.
• As citric acid contains 3 carboxyl groups, it is termed as TriCarboxylic Acid (TCA) cycle.

# Extra information -

• Krebs cycle is common pathway for oxidation of carbohydrates, proteins & fatty acids.
• Also known as Citric Acid cycle or Tricarboxylic Acid (TCA) cycle.
• Substrates entered - 1acetyl CoA, 1 oxaloacetate, 3 NAD+, 1 FAD+, 2 ADP
• Products produced - 2 CO2, 3 NADH, 1 FADH2, 2 ATP

Thanks dear. Hope this helps you...