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micro204

proteins enzymes

QuestionAnswer
enzymes are globular proteins
Enzymes are not ________ consumed in chemical reactions;
Sucrose is what?> substrate
active site of sucrase - what is secrase? enzyme
are enzymes specific ? yes, in their choice of substrate
Factors affecting enzyme activity Temperature; pH
what is the pH optimum for enzymes? 6 to 8
Below pH 6 is what? acidosis, very dangerous for blood
most human enzymes have a temp optimum between ? 35'C and 40' C
most enzymes are proteins. Not all of them are
enzymes can be: simple; made of proteins only; conjugated; apoenzyme; cofactor
apoenzyme protein portion
cofactor can be inorganic like metal ions; zinc is an inorganic factor; organic but not proteins- coenzyme
Superoxide free radicals so toxic to all cellular compounds that all organisms attempting to grow in atmospheric oxygen must produce an enzyme, SOD, to neutralize them
What is SOD Superoxide dismutase
what substance is produced by phagocytes to kill invading bacteria? singlet oxygen 1O2
singlet oxygen is very reactive molecule.
what can neutralize O2? Streptococci and Staphylococci
what converts hydrogen peroxide to water and oxygen? catalase
what enzyme breaks down hydrogen peroxide? peroxidase
other factors transforming oxygen? Hydroxyl radical (OH); pH; Osmotic pressure
Created by: Eureakofinfo
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