Question

describe and name three stages of cellular respriration that aerobic organisms use to obtain from glucose and explain about each stages.
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Answer 1

Answer:

1. glycolysis

2.pyruvate oxidation

3.Krebs cycle

4. ETC--- electron transport chain

EXPLANATION:

1.Glycolysis;

      glycolysis is a linear series of reaction in which 6-carbon glucose is split into two molecules of 3-carbon pyruvate acid.

2.Pyruvate oxidation;

      Pyruvate oxidation is the step that connects glycolysis and the Krebs cycle. In glycolysis, a single glucose molecule (6 carbons) is split into 2 pyruvates (3 carbons each), hence link reaction occurs twice for each glucose molecule to produce a total of 2 acetyl-CoA molecules, which can then enter the Krebs cycle.

3. Krebs cycle;

       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).

4. ETC;

         The electron transport chain is a series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons across a membrane. The electron transport chain is built up of peptides, enzymes, and other molecules.