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Which molecule is the starting substrate for the TCA cycle?

Practice Questions

Q1
Which molecule is the starting substrate for the TCA cycle?
  1. Pyruvate
  2. Acetyl-CoA
  3. Oxaloacetate
  4. Citrate

Questions & Step-by-Step Solutions

Which molecule is the starting substrate for the TCA cycle?
  • Step 1: Understand that the TCA cycle is a series of chemical reactions in the body that helps produce energy.
  • Step 2: Identify that the TCA cycle needs a starting molecule to begin.
  • Step 3: Learn that the starting molecule for the TCA cycle is called Acetyl-CoA.
  • Step 4: Know that Acetyl-CoA combines with another molecule called oxaloacetate.
  • Step 5: When Acetyl-CoA and oxaloacetate combine, they form a new molecule called citrate, which starts the TCA cycle.
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