1. Infectious self-reproducing agents consisting only of protein, with no nucleic acids (hypothesized in 1982 by Nobel Laureate Stanley B. Prusiner) are called :   proteomes   exteins   proteinoids   Prions   Hint Half-n-half Clue   2. Which of the following is not an aromatic amino acid ?   Tyrosine   Phenylalanine   Serine   Tryptophan   Half-n-half Clue   3. The Quaternary structure of a protein is :   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.   its structure resulting from interactions between amino acid side chains.   Half-n-half Clue   4. Which of the following is not a type of protein secondary structure ?   á-helix   â-pleated sheet   third level folding to form small globules   Turns   Half-n-half Clue   5. Which of the following amino acids is polar ?   Leucine   Valine   Histidine   Isoleucine   Half-n-half Clue   6. Successive amino acids in the polypeptide chains that make up a protein are held together by :   phosphodiester bonds   peptide bonds   interprotamine disulfide bonds   N-glycosidic bonds   Half-n-half Clue   7. 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