NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Enzyme structures release the energy in their substrates.
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Enzyme structures react with their substrates.
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Enzymes’ unique active site allows it to fit with only one substratemolecule.
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Enzymes interact with their substrates like welders building a steelskyscraper.
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Detailed explanation-1: -An enzyme’s function is intrinsically linked to its three-dimensional structure, determining how it performs substrate binding, catalysis, and regulation. X-ray crystallography has been the most important technique in the development of our understanding of enzyme structure and function.
Detailed explanation-2: -Explain how the structure of an enzyme relates to how well the function catalyzes chemical reactions. The structure of an enzyme is important because it allows for the correct substrate to enter the active site. If the enzyme is inhibited it cannot catalyze reactions because the substrate will not bind.
Detailed explanation-3: -This is called induced fit. Even with the conformational change, enzymes will only catalyze a specific reaction when the proper substrate is bound. The most accurate model to describe how an enzyme binds to a substrate is the induced fit model.
Detailed explanation-4: -Usually, each subunit of an enzyme has one active site capable of binding substrate. The characteristics of an enzyme derive from the sequence of amino acids, which determine the shape of the enzyme (i.e., the structure of the active site) and hence the specificity of the enzyme.