Signal Transduction 3 - Biological Molecules cont..txt

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Author:
Ant
ID:
194177
Filename:
Signal Transduction 3 - Biological Molecules cont..txt
Updated:
2013-01-21 10:22:01
Tags:
Biology Signal Transduction James Jim Thomas Biochemistry
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Description:
Signal Transduction
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    • author "Ant"
    • tags "Biology James Jim Thomas Biochemistry"
    • description "Signal Transduction"
    • fileName "Signal Transduction 3 - Biological Molecules cont."
    • freezingBlueDBID -1.0
    • What are the main three amino acid groups?
    • - Hydrophillic
    • - Hydrophobic
    • - Electrically charged.
  1. In certain conditions, an electrically charged molecule can be neutral. If this is the case, how does charge come about?
    Electrically charged amino acids are dissociated in the given solution.
  2. What is the directionality of protein translation with respect to the amino acids?
    Polypeptides are translated in the C-direction (I.e amino acids are added to the car boxy terminus).
  3. Beta pleated sheets are an example of secondary protein structure. What effect do they have on the protein?
    Beta pleated sheets have a stabilizing effect.
  4. What might cause a bend or turn in a polypeptide chain?
    Attached pro line or glycine residues can cause a protein to bend.
  5. Protein functionality is first apparent in,
    A) Primary structure
    B)Tertiary Structure
    C) Secondary Structure
    B) Tertiary
    (this multiple choice question has been scrambled)
  6. What is the basis of primary structure?
    Linear amino acid arrangement
  7. What is the basis of secondary structure?
    Hydrogen bonds between the peptide bonds.
  8. What is the basis of Tertiary structure?
    Hydrogen bonds between R-groups.
  9. What is the domain of a protein?
    • The smallest unit of sequence and tertiary and secondary folding that can be repeated. Like a repeat unit in a crystal.
    • It is not an individual protein in quaternary structure. Each individual protein may have a number of domains.

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