Question 1

Which amino acid has a phenol in its side chain?

Accepted Answer

tyrosine

Question 2

How many different fragments are formed when the following is treated with trypsin? $$	ext{Pro-Phe-Arg-Gly-Ala-Val-Tyr-Thr-Phe-Tyr}$$

Accepted Answer

3

Question 3

Which of the following best describes the relationship between the melting point of a fatty acid and its degree of unsaturation?

Accepted Answer

As the number of double bonds increases, the melting point decreases.

Question 4

Which of the following is a major biological component present in both triglycerides and phospholipids?

Accepted Answer

glycerol

Question 5

Which of the following amino acids is most likely to undergo phosphorylation in a protein?

Accepted Answer

serine

Question 6

Which of the following statements about the Fischer projection of L-alanine is correct?

Accepted Answer

The amino group is on the left.

Question 7

Which of the following is the correct product of the Hell-Volhard-Zelinsky reaction on valine?

Accepted Answer

An alpha-bromo acid

Question 8

Which of the following best explains why cholic acid is a good emulsifying agent?

Accepted Answer

It contains both hydrophobic and hydrophilic regions.

Question 9

Which of the following is a correct statement about the saponification of a triglyceride?

Accepted Answer

It produces glycerol and fatty acid salts.

Question 10

Which of the following best describes the structure of a peptide bond?

Accepted Answer

It is a planar, rigid bond due to resonance.

Question 11

Which of the following is a correct statement about the product of the Gabriel Malonic Ester Synthesis?

Accepted Answer

It produces an alpha-amino acid.

Question 12

Which of the following is a property of a thermoplastic polymer?

Accepted Answer

It softens upon heating and can be remolded.

Question 13

Which of the following best describes the product of the acid hydrolysis of a phospholipid?

Accepted Answer

Glycerol, fatty acids, and phosphate

Question 14

Which of the following is a correct statement about the structure of myrcene?

Accepted Answer

It is an acyclic monoterpene.

Question 15

Which of the following best describes the role of sodium hydroxide in the saponification of fats?

Accepted Answer

It acts as a base to hydrolyze ester bonds.

Amino Acids, Peptides, Lipids, and Polymers: Organic Chemistry Study Guide

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