Noun. 1. agoraphobia-a morbid fear of open spaces (as fear of being caught alone in some public place). phobia, phobic disorder, phobic neurosis-an anxiety disorder characterized by extreme and irrational fear of simple things or social situations; phobic disorder is a general term for all phobias. Translations.
Coenzyme [edit]. A coenzyme is a small, organic, non-protein molecules that carries chemical groups between enzymes. It is the cofactor for the enzyme and does not form a permanent part in the enzyme's structure. Sometimes, they are called cosubstrates and are considered substrates that are loosely bound to the enzyme. In metabolism, coenzymes play a role in group-transfer reactions, such as ATP and coenzyme A, and oxidation-reduction reactions, such as NAD+ and coenzyme Q10. Coenzymes are frequently consumed and recycled.
A cell â s physical and chemical environment affects enzyme activity 45 Enzymes speed up metabolic reactions by lowering energy barriers â¢A catalyst is a chemical agent that changes the rate of a reaction without being consumed by the reaction.âAn enzyme is a catalytic protein.