6.2 - BIOMOLECULES - AMINO ACIDS

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Across
  1. 3. There are four substituent groups occupying the ......... valency positions.
  2. 4. A particular property of amino acids is the ........... nature of –NH2 and –COOH groups.
  3. 5. Hence in solutions of different PH s, the structure of amino acids ............
  4. 8. All the water, ............ The remaining material gives dry weight.
  5. 11. Amino acids are organic compounds containing an amino group and an acidic group as substituents on the same carbon i.e., the .............
  6. 13. The R group in these proteinaceous amino acids could be a hydrogen (the amino acid is called glycine), a methyl group (alanine), hydroxy methyl (..........), etc.
  7. 16. Now if the tissue is fully burnt, all the ........... compounds are oxidised to gaseous form (CO2, water vapour) and are removed.
  8. 18. Similarly, there are aromatic amino acids (tyrosine, ..........., tryptophan).
  9. 19. What is remaining is called ‘........’.
  10. 20. One weighs a small amount of a living tissue (say a leaf or liver and this is called ..........) and dry it.
  11. 22. From a chemistry point of view, one can identify ........... groups like aldehydes, ketones, aromatic compounds, etc.
Down
  1. 1. However, ................. have also got inorganic elements and compounds in them.
  2. 2. But from a ............ point of view, we shall classify them into amino acids, nucleotide bases, fatty acids etc.
  3. 6. Based on number of amino and carboxyl groups, there are acidic (e.g., .............), basic (lysine) and neutral (valine) amino acids.
  4. 7. Inorganic compounds like .........., .........., etc., are also seen in the acid-soluble fraction.
  5. 9. These are hydrogen, carboxyl group, amino group and a variable group designated as .............
  6. 10. Based on the .......... of R group there are many amino acids.
  7. 12. The chemical and physical properties of amino acids are essentially of the amino, ........... and the R functional groups.
  8. 14. Therefore elemental analysis gives ............ composition of living tissues in the form of hydrogen, oxygen, chlorine, carbon etc.
  9. 15. Amino acids are substituted ..........
  10. 17. Analysis for compounds gives an idea of the kind of .......... and inorganic constituents present in living tissues.
  11. 21. This ash contains .......... elements.