AP Biology Multiple Choices

AP Biology Multiple Choices AP Biology Multiple Choices Highschool AP Biology, 30 multiple choices. At least 90% correction Circle the Answers or write the answers on a seperate sheet u3.pdf 11/17/2020 Formative Unit 3 Test Multiple Choice Name: _______________________ Date: _______________________ 1 Use the diagram below to answer the question. 1 ? What is occurring at the arrow marked “X”? ATP synthase phosphorylating ADP Electron transport chain Oxygen being reduced by an electron NADPH is forming https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 1/12 11/17/2020 Formative 2 1 During photosynthesis, if the input water is labeled with a radioactive isotope of oxygen, 18O, then the oxygen gas released as the reaction proceeds is also labeled with 18O. Which of the following is the most likely explanation? During the light reactions of photosynthesis, water is split, the hydrogen atoms combine with the CO2, oxygen gas is released. During the Calvin cycle, water is split, regenerating NADPH from NADP+, and oxygen gas is released. During the Calvin cycle, water is split, the hydrogen atoms are added to intermediates of sugar synthesis, and oxygen gas is released. During the light reactions of photosynthesis, water is split removing electrons and protons, and oxygen gas is released 3 1 The majority of ATP molecules are produced during which phase of cellular respiration? Oxidative Phosphorylation Krebs/Citric Acid Cycle Glycolysis Oxidation of pyruvate 4 What are the products of cellular respiration? 1 Water, oxygen and energy Glucose, carbon dioxide and energy Glucose, water and energy Carbon dioxide, water and energy https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 2/12 11/17/2020 Formative 5 1 Which of the following statements is true of cellular respiration? Both oxidation of pyruvate and the Krebs/Citric Acid cycle produce carbon dioxide The Krebs/Citric Acid cycle happens in the cytoplasm The only part of the process that makes ATP and NADH is glycolysis NADH and FADH are generated in cellular respiration and sent to the chloroplasts to aid in photosynthesis. 6 What is the cellular bene t of energy coupling? 1 Energy from a spontaneous reaction can be used to power a non spontaneous one. It increases the induced t, which speeds up reactions. Catabolic reactions can transform into anabolic reactions NADPH can be turned into ATP, which provides energy for the cell. 7 1 ? Which of the following statements about the diagram above is false? The triangles in the diagram represent electrons. The process depicted produces ATP. This process depicted could be happening in a mitochondria or in a chloroplast.Edgewood College Highschool AP Biology Multiple Choices. AP Biology Multiple Choices ORDER NOW FOR CUSTOMIZED AND ORIGINAL NURSING PAPERS The arrow pointing straight up represents facilitated di usion. https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 3/12 11/17/2020 Formative 8 1 ? The concentration gradient of triangles is described as Oxidative phosphorylation glycolysis The electron transport chain Chemiosmosis 9 The purpose of photosynthesis in a eukaryotic cell is to 1 Synthesize carbohydrates from CO2 Synthesize fats and proteins from CO2 Break down carbohydrates to provide energy for the cell in the form of ATP Break down carbohydrates to provide energy for the cell in the form of NADPH Provide oxygen to the cell 10 Oxidative phosphorylation is 1 A process only found in plant cells Creating ATP from ADP from a free oating P The main mechanism of fermentation Water molecule splitting apart https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 4/12 11/17/2020 Formative 11 1 ? In the process depicted above, where is the higher concentration of hydrogen ions? In the stroma In the cytoplasm In the inner thylakoid membrane In the intermembrane space In the matrix 12 1 ? The process depicted above is Glycolysis Fermentation Light Dependen Reactions Oxidative Phosphorylation https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 5/12 11/17/2020 Formative 13 Which of the following things about the Calvin Cycle is false: 1 NADPH reduces a 3 C sugar forming half a glucose It takes place in the stroma ATP is created when the leftovers are reassembled into the 5 carbon sugar A 5 carbon sugar is used to x CO2 14 1 Photosynthesis is an example of a ____________ and ____________ reaction. Anabolic, exergonic Catabolic, exergonic Anabolic, endergonic Catabolic, endergonic 15 1 Chlorophyll from Photosystem II has its electron “holes” lled by electrons from Water Photosystem I CO2 Electron Transport Chain NADPH 16 1 What are the nal electron acceptors for the electron transport chains in the light reactions of photosynthesis and in cellular respiration? NADP+ in the light reactions and O2 in cellular respiration CO2 in both H2O in light reactions and O2 in respiration A p.700 pigment and NADP+ in light reactions and NAD+ or FAD in respiration O2 in both https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 6/12 11/17/2020 Formative 17 1 Which metabolic pathway is common to both fermentation and cellular respiration of a glucose molecule? the electron transport chain glycolysis reduction of pyruvate the citric acid cycle 18 1 Autotrophs can acquire free energy from all of the following sources except Physical sources Inorganic molecules Organic molecules produced by other organisms Sunlight 19 How is ATP used to do cellular work? 1 It lowers the activation energy of reactions It phosphorylates other objects so that they can now do something they couldn’t do before It works as a coenzyme which allows enzymes to work faster It serves as mini energy factories, churning out NADPH 20 Which of the following is false about pigments? 1 Wavelengths that are absorbed by pigments are used to excite electrons Pigments can be many colors, not just green. Pigments are part of a photosystem Pigments are the same color as the wavelengths they absorb https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 7/12 11/17/2020 Formative 21 How could you measure the relative rate of photosynthesis? 1 Amount of H2O produced Amount of CO2 produced Amount of O2 produced Amount of NADP+ produced 22 What is the purpose of induced t? 1 To inhibit the enzyme and slow down the reaction To force a substrate into an enzyme that is typically used for something else To match up the substrate with the proper cofactor To ensure a perfect match with the substrate and the active site 23 1 If an enzyme in solution is saturated with substrate, the most e ective way to obtain a faster yield of products is to Add more substrate Add more of the enzyme Heat the solution to 90? Add an allosteric inhibitor https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 8/12 11/17/2020 Formative 24 1 An enzyme in the liver removes a phosphate group from glucose so the glucose molecule can enter the bloodstream, providing energy for cellular respiration to the cells of the body. The rate of enzyme activity can be monitored by measuring the phosphate concentration over time. In this experiment, liver cells were placed in a phosphate solution. Every 5 minutes, cells were removed, and the intracellular concentration of phsophate was measured. What is the rate of phosphate formation per minute from 15 to 20 minutes? ? 54 micromoles/min 90 micromoles/min 13.5 micromoles/min 18 micromoles/min 25 1 Lipase is a common enzyme used in the digestion of lipids into its monomers. What happens to the lipase in question after the reaction is over? It is broken down. Some of it is there, some of it is broken down. The amount that is left depends on various environmental factors. It is all there, ready to carry out more reactions. It is all there, but not able to carry out any more reactions https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 9/12 11/17/2020 Formative 26 Allosteric interactions 1 describes a process by which an enzyme’s function at the active site may be either activated or inhibited by the binding of a regulatory molecule at a separate site describes a molecule that is so similar to the normal substrate that it competes for the active site of the enzyme describes a molecule like a cofactor or coenzyme that helps the active site achieve the best t with the substrate describes the process by which a metabolic pathway is shut o by the product it produces 27 1 ? What is the optimal pH of trypsin? 3 6 9 12 https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 10/12 11/17/2020 Formative 28 1 ? Which of the following is false? You could expect trypsin to work at a pH of 10, but not pepsin. If you wanted similar activity rates for both enzymes you would use a pH of about 5.5 At a pH of 6, trypsin works better than pepsin Pepsin has a higher relative activity rate than trypsin when both are working in their optimal conditions. at a pH of 5 both of these enzymes work 29 1 ? Which of the following statements accurately describes the graphs above? (the y axis is Gibbs Free Energy) Graph A releases excess heat to the system. Graph A is a spontaneous reaction in a system. Graph B shows products with a larger amount of free energy than the reactants. Graph B represents an exergonic reaction. https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 11/12 11/17/2020 Formative 30 1 ? Which of the following statements is true? (the y axis is Gibbs Free Energy) The gain of G in Graph A is due to ATP being produced in the mitochondria. Graph B could represent photosynthesis. Graph A could represent photosynthesis The loss of G in Graph B results in decreased entropy of the universe. https://goformative.com/formatives/5fac5095acfc8be08083f5c1/print 12/12 … Get a 10 % discount on an order above $ 100 Use the following coupon code : NURSING10

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