The Presence of a Hydrophobic Amino Acid at Every Third $\alpha$

question 10

Multiple Choice

The presence of a hydrophobic amino acid at every third or fourth residue in $\alpha$ -keratin results in which of the following?

• A)a random placement of hydrophobic amino acids within the helix
• B)a strip of hydrophobic surface area that, when combined with another monomer, results in the formation of a dimer through hydrophobic interactions
• C)a strip of hydrophobic surface area that causes individual \(\alpha\)-keratin molecules to fold back on themselves through hydrophobic interactions
• D)represents a deleterious mutation that causes the \(\alpha\)-keratin molecules to aggregate and form plaques
• E)none of the above

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Definitions:

Resting Potential

The state of a neuron when it is not being stimulated or activated; it is the electrical potential of a neuron's interior relative to its surroundings when the neuron is not transmitting a signal.

Inactive Neuron

A neuron that is not currently firing or transmitting information.

Norepinephrine

A neurotransmitter and hormone that is involved in response to stress, increases arousal, and alertness, and plays a role in the body's "fight or flight" reaction.

Urogenital Tract

The anatomical system of the urinary and reproductive organs, often considered together due to their close proximity and shared functions in some contexts.