Amino acid Classification

Which amino acids have positively charged Basic R groups ?

• lysine arganine histidine

• lysine arganine

• histidine lysine

According to biochemical classification of amino acids valine is __________?

• with non polar side chain

• with polar side chain

• with positive side chain

• with negative side chain

Type of bonds between COOH terminal of one amino acid and NH2 terminal of another amino acid is ____?

• covalent

• peptide

• amide

• all answers are correct

Proteins are biopolymers of amino acids in which the monomer are linked in a linear fashion with which type of bond?

• amide

• hydrogen

Number of chiral centers in glycine (Gly) is ?

• 0

• 1

• 2

• 3

Cystein is a sulfur containing amino acid and forms a

• hydrogen bond

• Na bond

• K bond

• S-S bond

Hydrophilic amino acid side chains are attracted by

• H20 molecules

• K molecules

• Na molecules

• Cl molecules

Hydrophobic amino acid side chains are

• forced to go to outside of protein

• electrically negative

• electrically positive

• electrically neutral and nonpolar

In oil hydrophobic nonpolar amino acids will

• group together

• effectively dissolve

• move to the inside of the protein

• move to the outside of the protein

The bond that joins amino acids are called:

• Peptide Bonds
• Ester Bonds
• Glycosidic Linkages
• Phosphodiester Bonds