Question

Aerobic respiration requires the presence of …..

Answer 1

Hint: Respiration is one of the most essential chemical mechanisms that all living organisms, including plants, animals, and humans, use to release energy for life processes. Both in the presence and absence of oxygen, the mechanism of respiration takes place.

Complete answer:
Aerobic and anaerobic respiration are the two forms of respiration.
Aerobic Respiration is the mechanism of cellular respiration that occurs in the presence of oxygen gas in order to generate energy from food. Many plants and animals, including birds, humans, and other mammals, use this form of respiration. The end products of this process are water and carbon dioxide.
In the presence of oxygen, aerobic respiration is a biochemical mechanism in which food glucose is converted into energy. During the process of breaking the glucose molecule, 2900 kJ of energy is released, which is then used to generate ATP – Adenosine Triphosphate molecules, which are used by the machine for various purposes.
Steps involved in aerobic respiration:
The entire process of aerobic respiration is divided into four stages:
Glycolysis:
It is the breakdown of carbohydrates into sugars.
Glycolysis is the first step in aerobic respiration, and it takes place in the cell's cytosol.
The glucose molecules are split and divided into two ATP and two NADH molecules during the glycolysis process, which are then used in the aerobic respiration process.
Formation of Acetyl Coenzyme A :
The formation of acetyl coenzyme A is the second step in aerobic respiration.
In this process, pyruvate is oxidised in the mitochondria, yielding a 2-carbon acetyl group. The newly formed 2-carbon acetyl group reacts with coenzyme A to form acetyl coenzyme A.
Citric Acid Cycle:
The citric acid cycle, also known as the Krebs cycle, is the third step in aerobic respiration. During this stage of Aerobic respiration, oxaloacetate reacts with acetyl-coenzyme A to produce citric acid.
The citric acid cycle is a series of reactions that results in the production of two molecules of carbon dioxide, one molecule of ATP, and reduced forms of NADH and FADH.
Electron transport chain:
This is the final stage of aerobic respiration.
Large amounts of ATP molecules are produced during this phase by transferring electrons from NADH and FADH. A single molecule of glucose generates 34 ATP molecules.
Aerobic respiration requires the presence of Oxygen.

Note:
Aerobic respiration occurs in the cell's mitochondrial matrix. Aerobes come in a variety of forms, including:
Obligate Aerobes that must grow in the presence of oxygen.
Facultative aerobes can grow in both the presence and absence of oxygen.
Microaerophiles can grow in the presence of oxygen but cannot survive in high oxygen concentrations in the atmosphere.