Cell Biology/Proteins

What are peptides?

• polymer of α-amino acids

• polymer of β-amino acids

• polymer of carboxylic acids

• polymer of amides

The chemical bonds between amino acids in the primary structure of proteins are

• Hydrogen bonds

• Disulfide bonds

• Peptide bonds

• Ester bonds

Which statement is correct?

• All amino acids in nature are in L forms

• All amino acids are chiral

• In alpha amino acids, two functional groups are separated

  by two carbon atom

• All natural amino acids have S-configuration

Pick the correct "Non-polar" amino acid

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What is an amino acid , which contains a "Acidic" side chain ?

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The primary structure of a protein refers to the:

• Order of amino acids
• α-Helix or β-Pleated Sheet
• Interaction of subunits
• Hydrogen Bonding

What level of protein structure is this?

• Primary
• Secondary
• Tertiary
• Quaternary

which is the simplest amino acid?

amino acids are the building blocks of -----------

which amino acid lacks the free amino group

• threonine

• valine

• isoleucine

• proline