(1) MULTIPLE CHOICE QUESTION What is produced from the Kreb's cycle? carbon dioxide and 6 ATP oxygen and dinip oxygen and 2 AIP carbon dioxide and 2 ATP

## Step 1<br />The Krebs cycle, also known as the citric acid cycle or the tricarboxylic acid cycle, is a series of chemical reactions that generate energy through the oxidation of acetate into carbon dioxide. This cycle is a part of cellular respiration, which is the process by which cells produce energy.<br /><br />## Step 2<br />The Krebs cycle is a key component of the metabolic pathway by which all aerobic organisms generate energy. This pathway includes three stages: glycolysis, the Krebs cycle itself, and oxidative phosphorylation.<br /><br />## Step 3<br />The Krebs cycle itself is a series of redox reactions, which are reactions that involve the transfer of electrons between substances. The cycle begins with the combination of acetyl-CoA and oxaloacetate to form citrate, catalyzed by the enzyme isocitrate dehydrogenase.<br /><br />## Step 4<br />The cycle then proceeds through a series of reactions, each catalyzed by a different enzyme. These reactions ultimately produce carbon dioxide and ATP (adenosine triphosphate), which is the energy currency of the cell.