You Have Identified an Enzyme That Breaks Down a Storage

question 52

Multiple Choice

You have identified an enzyme that breaks down a storage form of sugar in plants (starch) into simple sugars.How would this enzyme react with a storage form of sugar (glycogen) in humans?

• A) Because enzymes are specific,the plant enzyme's active site would not bind to glycogen as a substrate.
• B) The plant enzyme's active site would bind to glycogen and break it down into simple sugars.
• C) The specificity of the plant enzyme is not dictated by the active site,so it would recognize both substrates.
• D) Plant enzymes are grouped by the macromolecule family they work on,and can therefore catalyze a reaction with any substrate in that macromolecule family.
• E) Enzymes cannot conduct catabolic reactions such as this one.

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