Which of the Following Characteristics Is Most Likely to Be

question 52

Multiple Choice

Which of the following characteristics is most likely to be associated with an enzyme that catalyzes two different chemical reactions?

• A) The enzyme contains α-helices and β-pleated sheets.
• B) The enzyme is subject to competitive inhibition and allosteric regulation.
• C) The enzyme is composed of at least two subunits.
• D) Either the enzyme has two distinct active sites or the substrates involved in the two reactions have very similar structures.

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Definitions:

Inconclusive

Not leading to a firm conclusion or definitive result; leaving questions unanswered.

Pursed-Lip Breathing

A breathing technique that involves breathing in through the nose and out through tightly pressed (pursed) lips to improve breath control.

Emphysema

A long-term, progressive disease of the lungs that primarily causes shortness of breath due to over-inflation of the air sacs (alveoli).

Pneumothorax

The presence of air or gas in the pleural space that causes collapse of the lung.