1. Which of the following amino acids is polar ?   Valine   Isoleucine   Histidine   Leucine   Hint Half-n-half Clue   2. Which of the following is not an aromatic amino acid ?   Tryptophan   Serine   Tyrosine   Phenylalanine   Half-n-half Clue   3. Each protein has a particular 3D structure which is decided by its:   primary structure   Quaternary structure   tertiary structure   secondary structure   Half-n-half Clue   4. The sequence of different amino acids in the polypeptide chain of a protein is called its :   Quaternary structure   primary structure   tertiary structure   secondary structure   Half-n-half Clue   5. The Quaternary structure of a protein is :   its structure resulting from interactions between amino acid side chains.   its structure resulting from the union of more than one protein molecule, called subunit proteins.   its amino acid sequence   its structure resulting from hydrogen bonds between the C=O and N-H groups of different amino acids.   Half-n-half Clue   6. Successive amino acids in the polypeptide chains that make up a protein are held together by :   peptide bonds   phosphodiester bonds   N-glycosidic bonds   interprotamine disulfide bonds   Half-n-half Clue   7. Which of the following is not a type of protein secondary structure ?   Turns   á-helix   â-pleated sheet   third level folding to form small globules   Half-n-half Clue