Proteins

Card Set Information

Author:
llwelp
ID:
205787
Filename:
Proteins
Updated:
2013-03-07 22:40:31
Tags:
livestock nutrion
Folders:

Description:
proteins in livestock animals for nutrition
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  1. What is the most abundant macromolecule in cells?
    proteins
  2. What are proteins composed of?
    • Carbon
    • Hydrogen
    • Oxygen
    • Nitrogen
    • sometimes sulfur and phosphorus
  3. What are the building blocks of proteins?
    amino acids
  4. What are the 10 essential amino acids?
    • Phenylalanine
    • Valine
    • Threonine
    • Methionine
    • Arginine
    • Tryptophan
    • Histidine
    • Isoleucine
    • Leucine
    • Lysine
  5. What are peptides?
    AA linked together by peptide bonds
  6. What are the two components of peptide bonds?
    • carboxyl group of one aa
    • amino group of another aa
  7. What are the categories of peptides?
    • dipeptide
    • tripeptide
    • polypeptide (10-15)
    • protein--> super long
  8. What are the levels of structure of proteins?
    • primary-straight chain
    • secondary-aa start to interact
    • tertiary-fold back with globular proteins
    • quaternary-interaction of 2 gene products
  9. Why are proteins buffers? (help maintain homeostasis)
    • amino end donates hydrogen
    • carboxyl end accepts hydrogen
  10. What structures of protein are more digestible?
    • tertiary
    • quaternary
  11. What is a downfall of proteins?
    • easily denatured by 
    • chemical, physical or biological
    • pH extremes, alcohols
    • heat
  12. What are the two groups of simple proteins?
    • fibrous-long chains, low digestibility
    • globular-compact, folded chains, higher digestibility
  13. What are considered nonproteins located in complex proteins?
    • glycoproteins
    • lipoproteins
    • phosphoproteins
  14. What are functions of proteins?
    • structure
    • transport
    • enzymatic
    • hormones
    • defense
    • muscle contaction
    • nutrient storage
    • energy
  15. What do proteins transport?
    • molecules in blood
    • hemoglobin (oxygen)
    • lipoproteins
    • membrane proteins
  16. A carbon skeleton structure:
    • H  O
    • l    ll
    • C--C--O
    • l
    • R
  17. What are the common limiting AA (in order)?
    • Lysine
    • Tryptophan
    • Methionine
  18. What are examples of animal protein?
    • milk protein
    • fish meal
    • blood meal
    • plasma proteins
    • meat and bone meal
  19. What is the general structure of a protein?
    • Central carbon attached to 
    • Hydrogen
    • amino group
    • R group (side chain)
    • Carboxyl group (O=C-O) at Carbon

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