Aerobic respiration in plants involves various steps such as glycolysis and the citric acid cycle. Fundamentally, it is the process of producing cellular energy in the presence of oxygen. Furthermore, it is a biological process involving the conversion of food glucose into energy in the presence of oxygen. The end products of the process are water and carbon dioxide. It is most common in plants and animals. Moreover, the energy from the process produces adenosine triphosphate molecules that the plant uses for various purposes. During the process, oxygen enters the plant cells through the stomata on the epidermis of the stem and leaves of a plant.
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THE STEPS OF AEROBIC RESPIRATION IN PLANTS
Primarily, the process of aerobic respiration in plants begins with glycolysis. It takes place within the cytosol of the cell. Glycolysis involves the splitting of the glucose molecules to produce adenosine triphosphate molecules. The next step in aerobic respiration is the formation of acetyl coenzyme A. Moreover, oxidization of pyruvate occurs within the mitochondria in the leaves of a plant to produce a 2-carbon acetyl group. 2-carbon acetyl group binds with coenzyme A to produce acetyl coenzyme A. Thirdly is the citric acid cycle. In this stage, oxaloacetate combines with acetyl-coenzyme A to produce citric acid.
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REACTIONS IN THE CITRIC ACID CYCLE
The citric acid cycle occurring in the leaves of a plant provides electrons that fuel the process of oxidative phosphorylation. This is therefore the main source of adenosine triphosphate and energy for aerobic respiration in plants. Additionally, the cycle begins with the enzyme citrate synthase. Citrate synthase pops off the acetyl group and adds it to oxaloacetate to form citric acid. Furthermore, the enzyme opens and closes around these molecules during the reaction.
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