The production of amino acids from proteins is an example of: a. a non-enzymatic reaction b. catabolism c. anabolism d. a reaction that releases ATP
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- ________ are always changed by participating in a reaction. a. Enzymes c. Reactants b. Cofactors d. CoenzymesWhich of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.Which of the following statements is false? Enzymesa) bind to substrates.b) lower the energy of activation.c) convert coenzymes to products.d) speed up biochemical reactions.e) can be named after the kinds of reaction they catalyze.
- Ben is studying an enzyme-catalyzed reaction. In the reaction, H+ ions are formed. He found that after a specific time, the reaction stopped, even though there was still a lot of substrate available in the mixture. a) Propose a hypothesis to explain why the reaction stopped.Which of the following statements concerning metabolism and metabolic reactions is CORRECT? A. Anabolism and catabolism are two terms with the same meaning B. Some, but not all, metabolic reactions involve catabolism C. Energy is a by-product of all metabolic reactions D. No correct responseWhich of the following metabolic processes can occur withouta net influx of energy from some other process?(A) ADP +~P i S ATP + H2O(B) C6H12O6 + 6 O2 S 6 CO2 + 6 H2O(C) 6 CO2 + 6 H2O S C6H12O6 + 6 O2(D) Amino acids S Protein
- Enzymes ................... the activation energy necessary for a reaction to take place. /A. IncreaseB. do not change C. Decrease D. are not involved withWhich of the following is true of metabolism? A. Degradative reactions require an input of energy. B. Synthetic pathways are anabolic. C. Catabolism and anabolism are linked by O2. D. Catabolic reactions require the breakdown of ATP, and anabolic reactions generate ATP.When an enzymatic reaction is in progress, do you expect to see happen to the amount of substrate? A It will increase as the reaction proceeds. B It will decrease as the reaction proceeds. C The amount will not change as reaction proceeds. D It is not possible to predict what will happen to it as the reaction proceeds.
- When substrate concentration [S] << Km, the rate of an enzymatic reaction is increased by A. increasing kcat/Km B. increasing total enzyme concentration C. increasing [S] D. A and B E. A, B and C increasing kcat/Km increasing total enzyme concentration increasing [S] A and B A, B and CThe substrate of an enzyme is? A. an organic accessory molecule B. The molecole(s) released at the end of an enzyme-facilitated reaction. C. The shape of the enzyme D. One of the amino acids that makes up the enzyme E. What the enzyme acts on.All of the following increase enzymatic activity except a. an increase in temperature. b. an increase in pH. c. an increase in concentration of the substrate. d. an increase in concentration of the enzyme that catalyzes the reaction.