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5 Written Questions

5 Matching Questions

  1. RNA
  2. Topoisomerases
  3. DNA
  4. Enzyme Activity
  5. Activation Energy
  1. a temperature- denature and breaks H bonds; pH; substrate concentration; inhibitors (antibiotics) inhibit enzymatic functions
  2. b antiparallel orientation of complimentary strands; DNA is supercoiled in the cells; denaturation and renaturation. ssDNA absorbs more light. RNA can compete with ssDNA hybridization.
  3. c Mostly single stranded; uracil in place of thymidine; mRNA; rRNA, tRNA
  4. d Needed to disrupt electronic configurations; physiological temperature and pressure too low for most chemical reactions to take place. Enzymes serve to speed up reactions by lowering activation energy.
  5. e alters the topology of DNA molecules.

5 Multiple Choice Questions

  1. occupy the active site
  2. general formula (CH2O)n; subunits linked by glycosidic bonds; poly hydroxy aldehydes or ketones and their derivatives; functions- structural support, nutrient and energy.
  3. Sugar + Base
  4. fruit sugar mostly; but found in plants and animals also
  5. 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 True/False Questions

  1. Tertiarythe actual sequence of the amino acids


  2. NAMN-acetyl neuraminic acid; important sugar acids in bacterial cell walls.


  3. Fatty Acid+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.


  4. Complex lipidsContain elements such as phosphorus, nitrogen, and sulfur; phospholipids form membranes (have polar head group); Main structural component of the cell membrane.


  5. Organellesproteins and RNA


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