Metabolic Biochemistry (AMINO ACIDS)

MCQ

Alanine(A)

• Non-polar

• Aliphatic 

• Hydrophobic

Valine(V)

• Non polar

• Aliphatic

• Hydrophobic 

• Branched R group 

Leucine(L)

• Non-polar

• Aliphatic

• Hydrophobic 

Isoleucine(I)

• Hydrophobic 

• Non-polar 

• Slightly solube in water 

Proline(P)

• Hydrophobic

• Non-polar

• Ring structure

Methionine(M)

• Hydrophobic

• Non- polar

• Aliphatic

Phenylalanine(F)

• Hydrophobic

• Non-polar 

• Aromatic ring

Tryptophan(W)

• Hydrophobic 

• Non-polar 

• Aromatic ring 

Glycine(G)

• Hydrophilic

• Polar 

• aliphatic 

• uncharged side chain 

Serine(S)

• Hydrophilic

• Polar 

• water-soluble 

Cysteine(C)

• Polar

• Hydrophobic 

• Sulfhydryl group can interact with water, BUT poor hydrogen bond donor and acceptor

Asparagine(N)

• Hydrophilic

• Polar 

• Side chain amide group can form hydrogen bonds with water

Glutamine(Q)

• Hydrophilic

• Polar

• Amine group in side chains react with water

Tyrosine(Y)

• Polar

• Both Hydrophobic & Hydrophilic due to its side chain containing a benzene ring and polar hydroxyl group 

• Benzene ring is non polar 

Threonine(T)

• Hydrophilic

• Polar- due to hydroxyl group

Aspartic Acid(D)

• Hydrophilic

• Polar due to carboxyl group

Glutamic Acid(E)

• Hydrophilic 

• Polar - due to the carboxyl group 

Lysine(K)

• Hydrophilic

• Polar due to the amino acid in the side chain

Arginine(R)

• Both hydrophobic and hydrophilic

• has hydrophobic propyl group

• Polar guandinium group

Histidine(H)

• Hydrophobic and Hydrophilic depending on its protonation

• It is polar