Scientists recently discovered a species of bacteria that’s capable of photosynthesis, but it’s anaerobic and doesn’t produce or use oxygen for respiration. which process will be absent in this organism?

Krebs cycle.

Explanation:

Anaerobic bacteria do not do the process called the Krebs Circle. This is because the Krebs Circle only happens in the presence of oxygen and anaerobic bacteria do not survive in the presence of oxygen.

The Krebs cycle, also called the citric acid cycle, or the tricarboxylic acid cycle, is one of the phases of cellular respiration discovered by biochemist Hans Adolf Krebs in 1938. This phase of respiration occurs in the mitochondrial matrix and is considered a amphibolic, catabolic and anabolic route.

In the Krebs cycle, pyruvic acid (C3H4O3) from glycolysis undergoes oxidative decarboxylation through the action of the pyruvate dehydrogenase enzyme found within the mitochondria of eukaryotes, and reacts with coenzyme A (CoA).  The result of this reaction is the production of acetylcoenzyme A (acetylCoA) and a carbon dioxide (CO2) molecule. AcetylCoA then reacts with oxaloacetate, or oxalacetic acid, releasing the coenzyme A molecule, which does not stay in the cycle, forming citric acid.

The Krebs cycle is oxygen dependent because decarboxylation of pyruvic acid is by oxidation; Once oxidized, this acid reacts with coenzyme A to form acetylcoenzyme A. Throughout the Krebs cycle, a large amount of ATP is produced, hence it is considered a major energy producer.

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