Textbo me what you wan ne Insert Design Layout References Mailings Review View H
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Textbo me what you wan ne Insert Design Layout References Mailings Review View Help Tell 8.4 Enzymes speed up metabolicreactions by lowering energy barriers What is the name of the cellular catalyst thatspeeds up chemical reactions?(153) What lowers the EA barrier (activation energy) so thatbonds can break at moderate tempera Look at the graph in Figure 814(155), Is the energy dfference between the reactants and prod affected by the presence of the enzyme? What do we call the site where the reaçtants bind to the enzyme? (155) Can an enzyme catalyze any reaction? (155) if substrate concentration increases, what happens to the reaction rate? (156) increases or decreases At high temperatures (therma ag taton), why do most enzymes stop working (157) Chapter 9 Cellular Respiration and Fermentation 9.1 Catabolicpathways yidd energy by oxidiang organic fuds Define oxidation and reduction. (166) Which reactant molecule is oxidizedduring cellular respiration? (166) Which reactant molecule is reduced during oellular respration? (166) What is the name of the electron carrier molecule used during cellular respiration? (167) What do electrons lose (and release) as they travel through the electron transport chain?(168) which molecule captures the electrons at the bottom of the electron transportchain? (168) What travels "down" thisroute? glucose - NADH electron transport chain oxygen (168) (KNOW ORDER FOR EXAM) What is the name of the enzymatic pathway thatbegns the degradation of glucose? (168) What is the name of the cyde that completes the breakdown of glucose and generates carbondioxide? (168) 9.4 During oxidative phosphorylation, chemiosmosis couples dedtron transport to ATP synthess When the more electronegative molecule of the electron transport chain accepts an electronisit oxidized or reduced? (174) Page 3 of 6 Type here to seardExplanation / Answer
Answer 8.4.
Answer 1. These are the enzymes. These are proteineous in nature and act as biocatalysts by increasing the rate of reaction, because of which products are formed quickly.
Answer 2. When the substrate binds to the enzyme, these enzymes help in breaking and forming the bonds. Otherwise, this work has to be done by the substrate alone. This enzymatic help, decreases the activation energy required by the substrate to get converted into the products.
Answer 3. In an enzyme catalysed reaction, the amount of activation energy is required less by the reactants in comparison to the non-enzymatic catalysed reactions. The products are at lesser energy level then the reactants in an enzyme catalysed reactions.
Answer 4. The site at which reactant or substrate binds to the enzyme is known as the active site. Each enzyme has specific active site.
Answer 5. Enzyme cannot catalyse every reaction, as a single key cannot open every lock. Each enzyme can bind to specific substrate, because of its active site specificity.
Answer 6. If the substrate concentration is increased keeping enzymatic concentration constant, then the rate of reaction will decrease.
Because active sites will not be available to the reactant or substrates to bind to the enzymes.
Answer 7. Enzymes are quite sensitive to the temperature and pH. There is an optimum value for it. If the values goes beyond that optimum value then enzymatic activity decreases.
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