AP BIOLOGY

Detailed explanation-1: -The tricarboxylic acid (TCA) cycle, also known as the Krebs or citric acid cycle, is the main source of energy for cells and an important part of aerobic respiration. The cycle harnesses the available chemical energy of acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).

Detailed explanation-2: -The Krebs cycle is the main source of energy for cells and is a crucial part of aerobic respiration. It consumes pyruvate to produce carbon dioxide, ATP, NADH, and FADH. The first product formed in the cycle is citric acid. Thus it is also known as the citric acid cycle.

Detailed explanation-3: -Why is the Krebs Cycle also known as the citric acid cycle? Because citric acid is the very first product generated by this sequence of chemical conversions, and it is also regenerated at the end of the cycle.

Detailed explanation-4: -What is the Krebs Cycle? Also known as the citric acid cycle, the Krebs cycle or TCA cycle is a chain of reactions occurring in the mitochondria, through which almost all living cells produce energy in aerobic respiration. It uses oxygen and gives out water and carbon dioxide as products.