A non-protein organic molecule that an enzyme needs in order to function, such as NAD, is called a
Correct answer: B. coenzyme
- A. cofactor metal ion
- B. coenzyme
- C. prosthetic group of a haemoglobin type
- D. substrate
Explanation
Coenzymes are organic helper molecules, often derived from vitamins, that bind loosely and carry chemical groups or electrons between reactions, and NAD is the classic hydrogen carrier of respiration. Inorganic helpers such as zinc or magnesium ions are cofactors. A prosthetic group is a helper bound tightly and permanently, such as the haem in catalase.
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About Characteristics of Enzymes
Enzymes are globular biological catalysts that lower activation energy without being consumed, usually showing specificity for particular substrates. Questions cover active sites, enzyme substrate complexes, the lock and key and induced fit models, intracellular and extracellular action, and the effects of denaturation, while distinguishing enzymes from non biological catalysts.
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