This Image Diagrams the Action of an Enzyme

question 32

Multiple Choice

This image diagrams the action of an enzyme.
Notice that the enzyme is depicted as being more tightly wrapped around the substrates in step 2 than it is in step 1. Why is this?

• A) When a substrate locks into the active site of an enzyme, the enzyme changes shape to mold itself around the substrates.
• B) Generally, the size of a substrate is larger than the size of the active site it must fit into. When the substrate enters the active site, the active site must stretch to fit.
• C) Before catalysis can occur, a substrate must change its shape so that it fits into the active site of the enzyme more precisely.
• D) Most active sites are only designed to hold one substrate. In this image, two substrates enter the active site, creating a tighter fit.

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Definitions:

Drug Dosage

The regimented amount of medicine determined safe and effective for treatment of a particular condition.

Dose Ordered

Dose Ordered refers to the specific amount of medication prescribed to be taken by a patient, as determined by a healthcare provider.

Dose Available

The quantity of a medication or drug accessible or administered for therapeutic use, often measured in specific units relevant to the medication's dosage form.

Cefazolin

An antibiotic used for treating bacterial infections by inhibiting the synthesis of the bacterial cell wall.