Question

Pyruvate is modified to ____________ and enters ____________ , where carbon dioxide is released and ATP is produced. This occurs in the ____________ . This process is ____________ .

Answer 1

Answer: Pyruvate is modified to Acetyl-CoA and enters the Krebs cycle, where carbon dioxide is released and ATP is produced. This occurs in the mitochondria. This process is Aerobic.

Explanation:

The energy needed to carry out the energy-consuming cellular processes is extracted mainly from the ATP molecule. However, to produce this molecule the cell uses organic molecules as a source of chemical energy, mainly carbohydrates, and lipids and this occurs via the catabolism of these molecules. The energy source of respiration is glucose that will be slowly degraded for the better energy utilization of the molecule. Glucose breakdown comprises 4 steps: Glycolysis - consists of the conversion of sugars to pyruvate and is processed in the cytoplasm. Pyruvate Oxidation - The pyruvate formed in glycolysis is transformed into acetyl CoA with CO2 release. Krebs Cycle - is a sequence of interconnected reactions that occur in the mitochondrial matrix to completely oxidize Acetyl COA molecules and release CO2. And respiratory chain - involves the phosphorylation of ADP to form ATP associated with electron transfer to oxygen with the release of water.