The R Group or Side Chain of the Amino Acid

question 47

Multiple Choice

The R group or side chain of the amino acid serine is -CH₂-OH. The R group or side chain of the amino acid leucine is -CH₂-CH-(CH₃) ₂. Where would you expect to find these amino acids in a globular protein in aqueous solution?

• A) Serine would be in the interior, and leucine would be on the exterior of the globular protein.
• B) Leucine would be in the interior, and serine would be on the exterior of the globular protein.
• C) Both serine and leucine would be in the interior of the globular protein.
• D) Both serine and leucine would be on the exterior of the globular protein.
• E) Both serine and leucine would be in the interior and on the exterior of the globular protein.

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