Types of Amino Acids

Q. A polypeptide at a physiological pH (≃7.4) shows a net positive charge. The amino acids in this polypeptide are most likely to be

1. acidic
2. basic
3. non-polar aliphatic
4. non-polar aromatic

Q. Which of the following is a dipeptide?

1. Cystine
2. Ornithine
3. Citrulline
4. All of these

Q.

Draw the structure of the amino acid, alanine.

Q.

Which of these amino acids is NOT a hydrophilic amino acid?

1. Tyrosine

2. Threonine

3. Aspargine

4. Valine

Q.

Choose the amino acid which has a sulfur group

1. Tryptophan

2. Tyrosine

3. Cysteine

4. Aspargine