Question

In which of the following do the two names refer to one and the same thing?

• A. Tricarboxylic acid cycle and citric acid cycle
• B. Krebs cycle and Calvin cycle
• C. Tricarboxylic acid cycle and urea cycle
• D. Citric acid cycle and Calvin cycle

Answer 1

The correct option is A

Tricarboxylic acid cycle and citric acid cycle

The Krebs cycle is also called the citric acid cycle because of the formation of citric acid in the first step of this cycle. It is also referred to as the TCA cycle because many of the intermediate compounds formed in the cycle have three carboxyl groups.