Amino acid quiz

Question 1

Which amino acids are aromatic?

Answer 1

Trp, Tyr, Phe.

Question 2

Which amino acids are involved in disulphide bond formation?

Answer 2

Cys, by means of -SH in the side chain.

Question 3

Which is an imino acid?

Answer 3

Pro

Question 4

Which amino acids are acidic?

Answer 4

Asp, Glu, owing to the -COOH in the side chain.

Question 5

Which amino acids are basic?

Answer 5

Lys, Arg His, owing to the -NH3 in the side chain.

Question 6

Which amino acids have a sulphur?

Answer 6

Met (nonreactive), cys

Question 7

Which amino acids can be phosphorylated?

Answer 7

Ser, Thr, Try owing tot he OH int he side chain.

Question 8

Which amino acids can be methylated?

Answer 8

Lys, Arg, His at the NH3 in the side chain.

Question 9

Which amino acids can be acetylated?

Answer 9

Lys, Arg, His at the NH3 in the side chain.

Question 10

Which amino acid is without an asymmetric carbon.

Answer 10

Gly

Question 11

Which amino acid has a methyl side chain?

Answer 11

Ala

Question 12

Which amino acid is frequently found in the hydrophobic core of a protein?

Answer 12

Nonpolar amino acids - Ala, leu and IIe.

Question 13

Which amino acids have a COOH in the side chain?

Answer 13

Asp, Glu.

Question 14

Which amino acids have the same molecular weight?

Answer 14

Leu, IIe.