What functional group is aded to proline amino acids in collagen structures to force the ring structure into a favorable conformation?

Amine

Aldehyde

Alcohol

Acid

Gwhich r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? which r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? −ch2−oh −ch2−o||c−nh2 −ch2−coo− −ch2−ch2−ch2−ch2−n+h3

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State one important difference between a physical change and a chemical change?