biochemistry Test one

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biochemistry Test one
2012-02-03 16:33:51

amino acids
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  1. What are the three parts of the amino acid?
    • Amino group
    • carboxylic acid
    • R group
  2. Which part gives the amino acids it’s distinct structure
    The R group
  3. What is Glycene’s distinct structure group
    Hydrogen is it's R group
  4. What is a carbon with four different substitutions
    asymmetrical and optically active
  5. L amino acids are ----------- incorporated
  6. D amino acids are made by
    enzymatically made and it's sometimes ribosomally made
  7. D amino acids have evidence that they arose by past------
    transcriptional isomerazation
  8. In what environment is the amino acid completely protanated and what are the charges?
    very low pH, the carboxylic acid and amino group have positive charges
  9. What is the state of the amino acid at the Physiological pH and what is the Physiological pH?
    The carboxylic acid will ionize by the amino acid has the hydrogen on it. and the physiological ph is a ph of 6.5
  10. How will you be able to pull the hydrogen off the amino group? What will the charge?
    by raising the alkalinity and you will have a negative species
  11. What is a double charge and when do you normally see them?
    zwitter ion, and you normally see them in physiological pHs
  12. What cause discourages ionization?
    surrounded by hydrophobic groups
  13. what bond encourages ionization and which bond discourages it?
    Ionic bonds encourage ionization, and hydrogen bonds discourage ionization
  14. What is the PK3?
    the ionization constant of the R group
  15. Examples of Hydrophobicity
    Oil and grease
  16. true/false R groups only have hydrophobic properties
    False. R groups can have both properties of hydrophobic and hydrophilic
  17. Globular proteins are viewed as --------- because
    creme filled chocolates because they have a hydrophilic outside layer and a hydrophobic center.
  18. What interacts with water and is responsible for the water solubility of proteins?
    hydrophilic amino acids
  19. what bonds does the hydrophilic amino acids tend to have?
    ionic and hydrogen
  20. acidic amino acids have additional ------- and where are they attached?
    carboxylic acids and they are attached to the alpha carboxylic acid not the Carbon
  21. the core part of the acidic amino acid is the------
    alpha carboxylic acid
  22. the--------is blocked so the---------stands out
    alpha carboxylic acid, R group
  23. Aspartic acid has what attached to it?
    one methylated group
  24. Glutamic acid has what attached to it?
    2 methylated groups
  25. At what pH are Aspartic and glutamic acid ionized?
    physiological pH
  26. What are lysosymes able to do?
    they cleave carbohydrates due to the environment
  27. the amide on aspartic acid makes it------
  28. the amide on glutamic acid makes it-----