1. The Quaternary structure of a protein is :   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.   its amino acid sequence   its structure resulting from the union of more than one protein molecule, called subunit proteins.   Hint Half-n-half Clue   2. The sequence of different amino acids in the polypeptide chain of a protein is called its :   Quaternary structure   secondary structure   primary structure   tertiary structure   Half-n-half Clue   3. Successive amino acids in the polypeptide chains that make up a protein are held together by :   phosphodiester bonds   peptide bonds   N-glycosidic bonds   interprotamine disulfide bonds   Half-n-half Clue   4. How many different amino acids are found in proteins ?   27   infinite   20   30   Half-n-half Clue   5. Each protein has a particular 3D structure which is decided by its:   tertiary structure   primary structure   Quaternary structure   secondary structure   Half-n-half Clue   6. Infectious self-reproducing agents consisting only of protein, with no nucleic acids (hypothesized in 1982 by Nobel Laureate Stanley B. Prusiner) are called :   Prions   exteins   proteinoids   proteomes   Half-n-half Clue   7. Which of the following is not an aromatic amino acid ?   Phenylalanine   Tyrosine   Serine   Tryptophan   Half-n-half Clue