The Polypeptide Chains in Alpha-Keratins

question 90

Multiple Choice

The polypeptide chains in alpha-keratins

• A) consist of long sections of alpha-helices.
• B) are sometimes twisted together to form rope-like structures.
• C) are held in a protein matrix by many disulfide bridges.
• D) All of the above are true.
• E) Only two of the above are true.

---

Definitions:

Victim

An individual who suffers harm, injury, or loss as a result of a crime, accident, or other event or action.

Ignoring

Intentionally paying no attention or showing indifference to someone or something.

Nocturnal Penile Tumescence

The phenomenon of penile erection during sleep, often occurring during rapid eye movement (REM) sleep.

Masturbatory Arousal

Sexual excitement and stimulation achieved through self-touch or masturbation.