DD - Amino Acids

Question 1

What is the zwitterionic form?

Answer 1

A neutral molecule containing a positively charged NH3+ group and a negatively charged COO- group

Question 2

How do you differentiate between L and D isomers?

Answer 2

Looking down from H to (Central) Carbon:
- If reading CORN is CLOCKWISE, shows L-isomer
- If reading CORN is ANTICLOCKWISE shows D-isomer

Question 3

Name the 10 non-polar amino acids

Answer 3

1. Glycine
2. Alanine
3. Valine
4. Leucine
5. Isoleucine
6. Proline
7. Methionine
8. Tryptophan
9. Phenylalanine
10. Cysteine

Question 4

Name the 5 uncharged polar amino acids

Answer 4

1. Serine
2. Threonine
3. Tyrosine
4. Asparagine
5. Glutamine

Question 5

What are the 2 negatively charged polar amino acids?

Answer 5

1. Aspartic Acid
2. Glutamic Acid

Question 6

Name the 3 positively charged polar amino acids

Answer 6

1. Lysine
2. Arginine
3. Histidine

Question 7

How do amino acids join together?

Answer 7

A condensation reaction joins the Carboxyl group and an amine group- releasing H2O (Forms Peptide bond)

Question 8

How is the linear protein sequence read?

Answer 8

N-to C-terminal