Enzyme, ATP, Photosynthesis
Quiz by Zhao
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36 questions
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- Q1What is a chemical reaction?A process that releases energyA process that stores energy in productsA process that transforms one set of compounds into anotherA process that releases energy from compounds30s
- Q2Which of the following is an example of an energy-releasing reaction?PhotosynthesisBurning hydrogen gasCombining hydrogen and oxygenRusting iron30s
- Q3What are reactants in a chemical reaction?Elements involved in a reactionThe energy produced in a reactionProducts of a reactionThe catalysts in a reaction30s
- Q4What are products in a chemical reaction?The elements before the reactionCompounds that result from a reactionReactants of a reactionThe substrate in a reaction30s
- Q5What does a catalyst do?Changes the productsIncreases the energy in a reactionSpeeds up the reactionSlows down the reaction30s
- Q6What is activation energy?Energy needed to start a reactionEnergy needed to release productsThe energy released after a reactionEnergy produced by a reaction30s
- Q7How do plants obtain energy?By capturing sunlightBy absorbing energy from the environmentBy breaking down glucoseBy consuming other organisms30s
- Q8Which of the following absorbs energy?Water decompositionCombining oxygen and nitrogenBurning hydrogen gasEnergy-absorbing reactions30s
- Q9How is energy released in reactions?When bonds are brokenWhen atoms collideWhen enzymes activateWhen bonds are formed30s
- Q10What are enzymes?Carbohydrates that aid in reactionsProteins that speed up reactionsLipids that increase reaction speedProteins that break down substrates30s
- Q11What is the role of enzymes in reactions?They provide energy for reactionsThey break chemical bondsThey speed up reactionsThey slow down reactions30s
- Q12What are substrates in enzyme-catalyzed reactions?The enzymesThe bondsThe productsThe reactants30s
- Q13What is the active site of an enzyme?The binding site for reactantsThe site where substrates bindThe site of energy releaseThe place where energy is stored30s
- Q14How do enzymes lower activation energy?By providing a site for reactionsBy using water moleculesBy increasing temperatureBy breaking chemical bonds30s
- Q15How do enzymes affect the speed of reactions?They do not affect the speedThey increase the speedThey decrease the speedThey stop the reaction30s