1. The sequence of different amino acids in the polypeptide chain of a protein is called its :   Quaternary structure   tertiary structure   primary structure   secondary structure   Hint Half-n-half Clue   2. 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 the union of more than one protein molecule, called subunit proteins.   its amino acid sequence   its structure resulting from interactions between amino acid side chains.   Half-n-half Clue   3. Successive amino acids in the polypeptide chains that make up a protein are held together by :   interprotamine disulfide bonds   peptide bonds   phosphodiester bonds   N-glycosidic bonds   Half-n-half Clue   4. Which of the following amino acids is polar ?   Leucine   Isoleucine   Histidine   Valine   Half-n-half Clue   5. Each protein has a particular 3D structure which is decided by its:   secondary structure   Quaternary structure   primary structure   tertiary structure   Half-n-half Clue   6. How many different amino acids are found in proteins ?   20   27   30   infinite   Half-n-half Clue   7. Infectious self-reproducing agents consisting only of protein, with no nucleic acids (hypothesized in 1982 by Nobel Laureate Stanley B. Prusiner) are called :   proteinoids   proteomes   Prions   exteins   Half-n-half Clue