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5 Written questions

5 Matching questions

  1. RNA
  2. Macromolecules
  3. precursors from the environment
  4. Protein Properties
  5. Nucleic Acids
  1. a Mostly single stranded; uracil in place of thymidine; mRNA; rRNA, tRNA
  2. b DNA and RNA; Basic Unit- nucleotide; Building Blocks- a cyclic pentose sugar; phosphate; nitrogenous base. DNA lacks a hydroxyl group making it more flexible.
  3. c m. wt. 10^3- 10^9; nucleic acids, proteins, lipids, polysaccharides. 4 most important to study.
  4. d Allosteric proteins- dual affinity (hemoglobin); denaturation and re-naturation of proteins; enzymatic activity (catalysts)- apo enzyme and holo enzyme; lowering of activation energy; E+S <-> [ES]-> Product + Enzyme
  5. e CO2, H2O, NH3, N2, etc.

5 Multiple choice questions

  1. m. wt. = 10^6-10^9; ribosomes, enzyme complexes, contractile systems, microtubules.
  2. proteins and RNA
  3. Made up of repeating units of amino acids (about 20 types); Subunits linked by peptide bonds forming polymers; Function: structural support, antibodies, contractile fibers, toxins, transport.
  4. The inhibitor binds to ES complex so that further reaction does not take place - either forward or backward.
  5. glucose and galactose

5 True/False questions

  1. Competitive Inhibitionoccupy the active site


  2. EnzymesBiological catalysts- specific for a chemical reaction; not used up in that reaction; Apoenzyme: protein.
    Co-factor: non-protein component; Coenzyme- organic cofactor (NAD, FAD); Holoenzyme-Apoenzyme + cofactor.


  3. Activation EnergyThe overall 3D structure of the polypeptide chain. Held together by different bonds: peptide, ionic, hydrogen, covalent, sulfhydryl, etc. Prions are proteins that don't take their correct 3D shape and are harmful; mad cow disease.


  4. Oligosaccharides+NH3-CHR-COO-; dipolar charges neutralize each other; side chain determines the charge. Carboxylic group and amino group form the peptide bond (H2O leaves). Peptide glycosidic bonds most important; 150 in our body only 20 make proteins. you have 3AA that make a tripeptide 3^3= 27 different combinations. more than 200 AA in a protein on average.


  5. Sucroseglucose and fructose; bad for teeth


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