A substance that affect the rate of the reaction without being consumed Select one: a. enzymes b. all of the above c. inhibitors d. catalyst
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1.
enzymes
all of the above
inhibitors
catalyst
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- 1. Match the following words with their definitions. Product Active site Enzymes Catalyst Substrate Activation energy a. amount of energy required for a chemical reaction to occur b. substances that bring about a chemical reaction without being changed itself c. substances that enzymes act upon d. regions on the surface of enzymes that fit the substrate e. substance formed from the substrate at the end of the chemical reaction with an enzyme f. proteins that speed up a chemical reactionThe function of enzymes is to:a. accelerate reactions to change the final resultb. produce otherwise non-existing reactionsc. stall reactions that would have happened otherwised. balance the pH in chemical reactionse. provide energy to biochemical reactions1. A student was given two test tubes. One tube contains a reaction catalyzed by an inorganic catalyst, while the second tube contains a reaction catalyzed by an enzyme which is protein in nature. Give two laboratory procedures which you can perform to differentiate which of the two tubes contain an enzyme-catalyzed reaction.
- When an enzyme catalyzes a reaction… A. The pH changes B. Substrate concentration is reduced C. Product concentration is reduced D. Substrate concentration is increasedThe ionization of a sodium atom to produceNa+ is an example ofa. oxidation.b. reduction.c. catabolism.d. anabolism.e. decomposition6. Define: Energy of activation (EA) and tell how enzymes change it. 7. Identify a, b, c, d and e for the Reactions A+B C+D Or C+D A+B C. b. A+B a. е. a. d. C. C+D d. Progress of the Reaction e. Free Energy b.
- 2. Characteristics of enzymes: a. One characteristic of enzymes is that they are reusable. This is important because b. Name other 3 characteristics of enzymes: i. i. i. 3. Naming enzymes a. Enzyme names end with Examples b. Enzymes are named after ExamplesAn Enzyme.. A. Becomes part of the final products B. Is consumed by the reaction C. Is nonspecfic for substrate D. is heat & pH sensitiveThe statement that is not true about enzymes is...A. works optimally if it is in accordance with the required pHB. has active sites where enzyme reactions with substrates occurC. can work in all reaction temperature rangeD. can only work for certain reactionsE. is strongly influenced by reaction temperature
- 1.A student was given two test tubes. One tube contains a reaction catalyzed by an inorganic catalyst, while the second tube contains a reaction catalyzed by an enzyme which is protein in nature. Give two laboratory procedures which you can perform to differentiate which of the two tubes contain an enzyme-catalyzed reaction. 2. List the enzymes whose levels are elevated in blood serum as a result of hepatitis or cirrhosis of the liver.4. A group of students is conducting a lab investigation on a chemical reaction. An enzyme is present during the chemical change, and the reaction rate is recorded at various temperatures. Their results are graphed below. What would be the most likely explanation of these results? @ The investigation was flawed and should be repeated. B The reaction is complete. © The enzyme was removed from the reaction. D The enzyme began to lose the ability to function at higher temperatures. temperature reaction rate26. AN ORGANIC COFACTOR IN A CONJUGATED ENZYME?A. NEITHER VITAMINS NOR MINERALSB. MINERALS C. VITAMINSD. BOTH VITAMINS AND MINERALS 27. WHICH OF THE FOLLOWING STATEMENTS CONCERNING COFACTORS IS INCORRECT?A. VITAMINS CANNOT BE COFACTORSB. SOME COFACTORS ARE METAL IONS C. COFACTOR IS THE NON-PROTEIN PORTION OF ENZYME D. CONJUGATED ENZYMES CONTAIN COFACTORS 28. WHICH OF THE FOLLOWING VITAMINS IS NOT A FAT SOLUBLE VITAMIN? A. VITAMIN E B. VITAMIN C C. VITAMIN A D. VITAMIN D 29. WHAT HAPPENS TO SUBSTRATE MOLECULES AT AN ENZYME ACTIVE SITE?A. ALWAYS REACT WITH OXYGEN B. UNDERGO CHANGE TO A DESIRED PRODUCTS C. BECOME CATALYST C ALWAYS REACT WITH OXYGEN B UNDERGO CHANGE TO A DESIRED PRODUCT D. BECOME COVALENTLY BONDED TO THE ENZYME D. BECOME COVALENTLY BONDED TO THE ENZYME 30. ACTION OF CHEMICAL WARFARE AND ORGANOPHOSPHATE INSECTICIDE ARE BASED ON?A. REVERSIBLE ENZYME INHIBITOR B. IRREVERSIBLE ENZYME INHIBITOR C. REVERSIBLE ENZYME ACTIVATOR D. IRREVERSIBLE ENZYME ACTIVATOR
