PPT-Unit 5 Cellular Energy I. Enzymes

159 There are countless numbers of chemical reactions occurring in every cell all the time Virtually all of these reactions require the action of catalytic . Apoenzymes. , . Holoenzyme. , . Abzymes. , . Synzyme. , . Ribozyme. , . Extremozyme. , Historical Development in . Enzymology. , . Characteristics of enzymes, Enzyme Vs Chemical Catalysts. , Enzyme mechanism & Activation Energy, Enzyme Specificity, Fischer and . Chap 9: Cellular Respiration. THINK ABOUT IT. You feel weak when you are hungry because food serves as a source of energy. . How does the food you eat get converted into a usable form of energy for your cells?. Energy and Matter. Macromolecules. Interactions between molecules . Photosynthesis. Cellular respiration. Cycles of matter. Free energy. Photosynthesis. AP Framework: 4.A.2. Holtzclaw. : . 83-91 (10.1-10.4. Photosynthesis. - the process of absorbing light energy and converting it into stored chemical energy.. Chemical equation:. Cellular Respiration. - the breaking down of a food substance into usable cellular energy in the form of ATP. Key Concept. How do cells release the energy from glucose?. Agree or Disagree. Cellular respiration only occurs in lungs . cells. Disagree. Without oxygen cellular respiration cannot continue. .. Disagree. Some reactions have enzymes. What might be an advantage to having enzymes in chemical reactions? Any disadvantages?. Can you name any enzymes?. Bellringer-3/9/15. Enzymes. Most enzymes are proteins. Act as a catalyst to speed up a chemical reaction by helping molecules react with each other faster. IMPORTANCE. OF ENZYMES. Enzymes are biological catalysts that:. . I. ncrease. . reaction rates . by lowering the amount of energy needed for the reaction to occur. 100-1000x . faster. !!!. Activation Energy. protein. !. Enzymes are . Biological . catalysts . that . increase. . the rate of metabolic reactions.. Since enzymes speed up chemical reaction rates, what are they called?. Catalyst- . A substance . Part 1. . Chapter 3. Learning outcomes. You should be able to:. explain how enzymes work. describe and explain the factors that affect. enzyme activity. use V. max. and K. m. to compare the affinity of different enzymes for their substrates. Chapters 6 and 7. What is energy?. Energy. : the capacity to bring about movement against an . ______________. ; ability to do work. Forms of Energy. Potential energy. : stored energy. Chemical energy. This is where . enzymes. come into play!. Help the body do this!. Enzymes. What are they. ? What properties do they have?. Why do we need them?. How do they work?. Enzymes. – . What are they?. P. To the penny placed on your desk.. Observe the penny but don’t touch it. What happens?. Explain why. 2. Give the penny a . little . push. What happened?. Why did the penny move the second time and not the first time?. WHAT IS CELLULAR RESPIRATION?. Metabolic reactions in the cell that are designed to convert nutrients from food into Adenosine Triphosphate (ATP). Carbohydrates, fats, and proteins can all be used as fuel. that . catalyze. (. i.e.. , . increase or decrease the rates. of) . chemical reactions. .. . In enzymatic reactions, the . molecules. at the beginning of the process are called . substrates. , and they are converted into different molecules, called the .