An Enzyme Is Optimally Active at Neutral PH, but Activity

question 42

Multiple Choice

An enzyme is optimally active at neutral pH, but activity drops off sharply if the pH is changed, This enzyme is likely to have what in the active site?

• A) the side chains of aspartate and glutamine
• B) two histidine amino acid side chains
• C) a glycine amino acid
• D)polar side chains
• E) nonpolar side chains

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Definitions:

Blood

A vital liquid flowing in the bodies of many types of animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.

Prepuce

The fold of skin that covers the head of the penis in uncircumcised males and the clitoral hood in females; also known as foreskin in males.

Circumcision

The surgical removal of the foreskin from the male penis, often for religious, cultural, or medical reasons.

Cowper's Glands

Small glands located on each side of the urethra in males that produce a fluid to lubricate and neutralize the acidity of the urethra before ejaculation.