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- ________ are always changed by participating in a reaction. a. Enzymes c. Reactants b. Cofactors d. CoenzymesA thermodynamically spontaneous reaction O A. happens quickly, with no addition of energy to the system O"happens quickly whether or not there is an addition of energy to the system В. has the capacity to happen but might not happen quickly has the capacity to happen but only in the presence of a catalystWhich of the statement is true regarding equilibrium? The rate of the forward reaction exceeds the rate of the reverse reaction The concentration of the reactants and the concentration of the products remains constant The value of equilibrium constant will change if a catalyst is present O Increasing the concentration of reactants increase the equilibrium constant
- 0he rate of a reaction increases as wbich of the following Decreases! A Temperature BTemperatre and concentrationof reactant lconcentration of reactant Dparticle sizefilm araund of a Gas A pusses thirough acatalyst. the thickness of film is f . Mole fraction of A in the bulk of gas is yAo- A the Film, No reaetion takes place. but when A Contucts with catalyst the fast reaction nA >An fakes place . An comes back to the bulk of fluid. Calculate NA of the Rilm bulk Catalys tThe 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 reactions
- Endergonic reactions 000 can drive exergonic reactions have a positive AG are spontaneous have a negative AGThe 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 temperatureEnzymes act as catalysts in biochemical reactions. Reaction Model D.O. WX WX W In the diagram, which represents a catalyst? O W OY O WX
- An atom that can donate electrons during a reaction is calleda. an oxidizing agentb. a reducing agentc. an ionic agentd. an electrolyteWhich of the following statements DOES NOT describe the enzyme active site? O tis where the substrate binds. O is where catalysis occurs, Ctis wherc aninhibilormay bind.When an enzyme catalyzes a reaction: onisido stunim q a. Substrate(s) bind in the active site The b. Products bind in the active site eri c. The shape of the enzyme remains unchanged l f d. The enzyme is consumed by the reaction
