In the Lock-And-Key Model of Enzyme Action,the Enzyme Active Site

question 47

Multiple Choice

In the lock-and-key model of enzyme action,the enzyme active site is thought of as ________.

• A)a rigid,nonflexible shape that fits the substrate exactly
• B)an area of the enzyme that can adjust to fit the substrate shape
• C)a key-like shape that fits into a pocket of the substrate surface
• D)a hydrophilic area on the enzyme surface
• E)a lock that bars a noncompetitive inhibitor from reacting

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Definitions:

Specific Gravity

The ratio of the density of a substance to the density of a reference substance; typically, for liquids, water is used as the reference.

Polycystic Kidney Disease

A genetic disorder characterized by the growth of numerous cysts in the kidneys, which can lead to impaired kidney function and kidney failure.

Anuria

The absence of urine production.

Hematuria

The presence of blood in the urine.