When Varying the Substrate Concentration at a Fixed Concentration of Enzyme

question 72

Multiple Choice

When varying the substrate concentration at a fixed concentration of enzyme it is observed that at low concentrations of substrate the reaction is ________,while at high concentrations of substrate the reaction is ________.

• A)maximal;initial
• B)initial;maximal
• C)second order;first order
• D)first order;second order
• E)first order;zero order

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Definitions:

Substrate

In biochemistry, the reactant that an enzyme acts upon to catalyze a chemical reaction.

Pepsin

An enzyme in the stomach that breaks down proteins into smaller peptides, facilitating digestion.

Denature

A process in which proteins lose their native shape and functionality due to the disruption of non-covalent bonds, often caused by changes in pH, temperature, or chemical exposure.

pH

A scale used to specify the acidity or basicity of an aqueous solution, with values ranging from 0 to 14.