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Question: Answered & Verified by Expert
What is the first step of the TCA cycle?
BiologyRespiration in PlantsNEET
Options:
  • A Decarboxylation of isocitrate
  • B Synthesis of ATP from ADP
  • C Reduction of NAD⁺ to NADH + H⁺
  • D Condensation of acetyl group with oxaloacetic acid (OAA)
Solution:
2799 Upvotes Verified Answer
The correct answer is: Condensation of acetyl group with oxaloacetic acid (OAA)
The TCA cycle starts with the condensation of acetyl group with oxaloacetic acid (OAA) and water to yield citric acid.

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