What Characterizes the Amino Acids That Are Found in An \alpha

question 26

Multiple Choice

What characterizes the amino acids that are found in an $\alpha$ -helical segment that spans a membrane?

• A)exclusively circular
• B)predominantly hydrophilic
• C)predominantly hydrophobic
• D)predominantly antiparallel
• E)totally parallel

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Definitions:

Abscission Zone

The area at the base of the petiole where the leaf will break away from the stem. Also known as the abscission layer.

Bundle Sheath

Bundle sheath cells are specialized cells surrounding the vascular bundles in plants; they play a crucial role in the C4 photosynthetic pathway by concentrating CO2 around the enzyme RuBisCO.

Underground Stems

Stems that grow beneath the surface of the soil which function in nutrient storage and vegetative reproduction.

Fleshy Leaves

Thickened leaves adapted for water storage, common in plants that live in arid environments.