Metabolism refers to the chemical reactions that occur within cells. A hypothetical metabolic pathway is shown below.
Reactions occur in a sequence and a specific enzyme catalyzes each step.
Intermediates can be used as starting points for other pathways. For example, "C" in the diagram above can be used to produce "D" but can also be used to produce "F".
There are two ways wherein cells regulate the activity of enzymes. These involve controlling the amount of the enzyme and controlling the activity level of the enzyme.
They are termed to be metabolic pathways.
enzyme activity within the metabolic pathways
ribosomes, cell membrane and transport and enzyme activity
Temperatures affect speed of metabolism, enzyme activity, and the blood's ability to carry oxygen.
They run on feedback systems. The compound that they create could speed up the process of enzymatic activity, or a higher concentration of the substrate(The compound that is being changed).
feedback inhibition
The product inhibits the activity of the first enzyme
The enzyme is inactive at this point. New enzyme must be added to regain enzyme activity
Feedback inhibition
Denature enzyme activity
There are hundreds of them. Amino acidopathies and organic acidemias, resulting from disorders in amino or fatty acid catabolism, Dysfunction of the enzyme glutaryl CoA dehydrogenase prevents the metabolism of tryptophan, hydroxylysine, and lysine, resulting in increased urine glutaric acid metabolites, and cerebral organic acidopathies resulting from defects in the leucine catabolic pathway among many more.