BIOL 111 SECTION 544 555Instructor Dr Xie Name U I N Exam 3Form A November 14 2025 INSTRUCTIONS 1 Sign your name in the space marked SIGNATURE at the bottom of this page NOTE Enter your name and U I N at the top of this pageBecause these forms are computer graded it is extremely important that the following information iscorrect Please check your responses 2 Print your First and Last name NEATLY on the Name box at the top left of the bubble sheet 3 Print your UIN Universal Identification Number in the ID box 9 digit number on your student ID 5 Enter the Section Date and Exam in the corresponding boxes of the bubble sheet6 Sign the bubble sheet in the box labeled Aggie Honor Code Signature 7 Bubble in your answers to the corresponding number row on the bubble sheet Bubble your answerin as fully and neatly as possible 8 Please check that you have 42 questions ALWAYS CHOOSE THE BEST ANSWER AAn Aggie does not lie cheat or steal or tolerate those who do On my honor as an Aggie I have neither given nor received unauthorized aid on thisacademic work Your Signature2025 Texas A M University Biology Department Unauthorized use of this material is aviolation of federal law 1 Exam 3Name MULTIPLE CHOICE Choose the one alternative that best completes the statement or answers the question 1 What is the purpose of the electron transport chain as discussed in class 1 A the breakdown of an acetyl group to carbon dioxideB the breakdown of glucose into six carbon dioxide moleculesC substrate level phosphorylationD the harnessing of energy to establish and maintain a proton gradient2 Electron transport chain and chemiosmosis produce most of the ATP during cellular respiration Substrate level phosphorylation contributes what percentage of the ATP generated bychemiosmosis 2 A 0 B 100 C 50 D 2 3 Based on a series of laboratory experiments you created the below figure to illustrate the freeenergy changes in the reactions between compounds A B C and D You discovered that thechange of free energy is 40 kcal mol when an enzyme is present in the reaction What will be the cid 458 G of the reaction A B C D in absence ofthe enzyme 3 A 20 kcal molB 40 kcal molC 10 kcal molD 20 kcal mol4 4 A tRNA has anticodon 5 cid 397 UUG 3 cid 397 What is the codon on the mRNA that it will bind A 5 GUU 3 B 5 UUG 3 C 5 AAC 3 D 5 CAA 3 5 Which of the following statements best describes the relationship between photosynthesis andcellular respiration 5 A Cellular respiration runs the biochemical pathways of photosynthesis in reverse B Photosynthesis occurs only in plants cellular respiration occurs only in animals C Photosynthesis stores energy in complex organic molecules cellular respiration releasesenergy from complex organic molecules D Photosynthesis is catabolic cellular respiration is anabolic 6 Which of the following types of reactions would decrease the entropy within a cell 6 A anabolic pathwaysB digestionC catabolic pathwaysD hydrolysis2 Exam 3Name 7 Which of the following processes occurs during the Calvin cycle 7 A reduction of NADPHB release of oxygenC production of ATPD regeneration of RuBP CO2 acceptor 8 What is the role of oxygen in cellular respiration 8 A It serves as the final electron acceptor of glycolysisB It serves as the final electron acceptor of the ETCC It oxidizes pyruvate to acetyl CoAD It is used to split a H2O at the end of ETC9 Which of the following statements is TRUE regarding fermentation anaerobic respiration 9 A Lactic acid fermentation release Oxygen O2 B Lactic acid fermentation release carbon dioxide CO2 C Human use alcohol fermentation for energy production when Oxygen O2 is lowD Alcohol fermentation release carbon dioxide CO2 10 Figure 2 Which of the following is the most correct interpretation of the figure 2 10 A Energy from catabolism can be used directly for performing cellular work B i acts as a shuttle molecule to move energy from ATP to ADP C ATP is a molecule that acts as an intermediary to store energy for cellular work D ADP i are a set of molecules that store energy for catabolism 11 What is the relationship between the wavelength of light and the energy of each photon 11 A Energy mostly stays constant across wavelengths B They are unrelated phenomena C They are inversely related D They have a direct linear relationship 12 Which of the following statements correctly describes post translational modification of proteinsin eukaryotic translation 12 A A signal peptide binds with the ribosome to initiate the protein modification B A signal peptide prevents a protein from entering the endoplasmic reticulum ER C A signal peptide guides a protein to the mitochondria where the protein is further processed D A signal peptide guides a protein to the endoplasmic reticulum ER where the protein isfurther processed 3 Exam 3Name 13 What happens to water as the initial input of the overall photosynthesis reaction 13 A It accepts electrons B It becomes dehydrated C It is oxidized D It is reduced 14 14 Which of the following processes do not occur during gene expression in prokaryotes A Alternative splicingB Transcription occurs in cytoplasmC Translation occurs in cytoplasmD A transcription factor binds to the promoter15 15 Which of the following statements correctly explains how living organisms relate to the first and second lawsof thermodynamics A Living organisms are a rare exception to the second law because they remain highly organized B Living organisms obey the second law by using energy and increasing the entropy of theirsurroundings C Living organisms transfer energy from food to power cellular work but a small amount of that energyis permanently lost from the universe D Living organisms create new energy from nutrients so the first law does not apply 16 What are the outputs of the light reactions in photosynthesis 16 A NADPH ATP and O2B ADP and NADP C H2O and CO2D C6H12O6and ATP17 In the photosynthesis lab activity we used the green alga Chlamydomonas In these cells ATPsynthesis by chemiosmosis occurs during 17 A respiration onlyB both photosynthesis and cellular respirationC photosynthesis onlyD photosynthesis cellular respiration and fermentation18 Which of the following statements is true for all endergonic reactions 18 A The reaction goes only in a forward direction all reactants will be converted to products butno products will be converted to reactants B The products have higher level of free energy than the reactants C The reaction proceeds with a net release of free energy D
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