Integrins Are Single-Pass Integral Membrane Proteins in the Plasma Membrane

question 16

Multiple Choice

Integrins are single-pass integral membrane proteins in the plasma membrane of animal cells and are involved in the interaction of the cell with the surrounding extracellular matrix. Which of the following descriptions do you think matches the transmembrane part of an integrin molecule?

• A) It forms a β barrel.
• B) It is an α helix that is bent in the middle.
• C) It is about 10 amino acids long, with every other amino acid side chain being hydrophobic.
• D) It folds in a conformation with maximal intrachain hydrogen-bonding.
• E) It is about 100 amino acids long.

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Definitions:

Scapular Areas

Regions of the body's back near the shoulder blades, important in many movements of the upper limbs.

Acute Hypoxemia

A condition characterized by an abnormally low level of oxygen in the blood, often sudden in onset.

Diaphoresis

Excessive sweating, often a response to physical activity, heat, stress, or a medical condition.

Cyanosis

A bluish or purplish discoloration of the skin and mucous membranes due to insufficient oxygenation of the blood.