Transcription of MCAT – BIO: Print and Highlight in PDF
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MCAT – BIO: Print and Highlight in PDF
MCAT BIO: Print and Highlight in PDF most bio molecules: -lipids -proteins -carbohydrates -nucleotide derivatives 70 to 80 % water is cell water, small polar molecule, can H-bond allows it to maintain liquid at room cohesive forces squeeze hydrophobic away from H20 hydrophilic dissolve easily -negative charged ends attract the posi H s of H20. Most macromolecules can be hydrolyzed, and formed via dehydration. lipid low sol in H20, high sol in nonpolar make good barriers 1) Fatty acids 2) triaglycerols 3 phsopho lipids 4) glycolipids 5)steroids 6) terpenes Fatty acids are building blocks for most lipids Saturated FA s only single C-bonds Unsaturated one or more double C-C bonds most fats reach cell as FA, not triaglycerols tria s are 3
amp is a messenger. --- Enzymes globular proteins catalysts lower activation E not consumed, altered ... Metabolism: all the cellular chemical rxns 3 stages 1) macromolecules broken down into constituent parts (little E released) ... called respiration. aerobic and anaerobic versions.
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