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Unit 3 Cellular Energetics AP Biology Exam ReviewEnzyme Structure1) To the right is an enzyme-substrate complex. Label what A, B, and C represent.2) Describe how enzymes work. Make sure to include the terms products, reactants, andactivation energy.Enzyme Catalysis and Environmental Effects3) How can a scientist make an enzyme reaction increase in production rates?4) What could slow down the creation of products from an enzymatic reaction? Give at least three items.5) What is denaturation? What causes this process to occur?
6) Compare the first law to the second law of thermodynamics. Give examples of each.Cell Energy: Catabolic and Anabolic Reactions7) Compare catabolic to anabolic reactions.8) Look at the picture to the right. Whichdiagram (A or B) is an anabolic reaction andwhich one is a catabolic reaction. How can youtell?Cell Energy: Endergonic and Exergonic Reactions8) Compare an endergonic to an exergonic reaction.Give examples of each.Cell Energy: ATP BasicsAB
9) A molecule of ATP is shown to theright. Identify what A, B, and Crepresent.10) Identify what type of reaction(endergonic or exergonic) occurswhen the process happens:a) The building of ATP:b) The breaking down ofATP:11) How is ATP made?
12) The steps of photosynthesis are outlined to the right. Foreach step, identify what starts the reaction, what is created,and where the process takes place.a) Light Dependent Reactions:b) Light Independent Reactions:c) What is the overall reaction for PS?13) What organisms can perform photosynthesis?14) How did photosynthesis evolve?15) How are Photosystems II and I different? What colors oflight do they like to absorb?
16) The steps of cellular respiration areoutlined to the right. For each step,identify what starts the reaction, what iscreated, and where the process takeplace.a) Glycolysis:b) Kreb’s Cycle/Citric Acid Cycle:c) Oxidative Phosphorylation(Electron Transport Chain)17) What occurs when oxygen is notpresent? Describe the difference betweenalcohol and lactic acid fermentation.

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