An enzyme that catalyses the removal of hydrogen from a substrate is classified as a
Correct answer: A. dehydrogenase
- A. dehydrogenase
- B. hydrolase
- C. isomerase
- D. ligase
Explanation
Enzymes are usually named from the substrate or the reaction plus the suffix ase, so a dehydrogenase removes hydrogen, as succinate dehydrogenase does in the Krebs cycle, passing it to a coenzyme such as NAD. Hydrolases split bonds by adding water, isomerases rearrange a molecule into its isomer and ligases join two molecules together. Knowing the suffix system lets an unfamiliar enzyme name be interpreted on sight.
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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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