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AP Euro Unit 2 Quiz ProProfs Quiz. Plant cell because it will become turgid, C. Animal cell because it will become turgid, A. The AP English Language and Composition Exam includes multiple-choice and free-response questions that test essential skills covered in the course curriculum: Ap human geography. mark mester engaged You are allowed to use this resource on the AP Biology Exam. A phospholipid has 2 parts. B) ATP synthase activity depends on a proton gradient across the thylakoid membrane. Water will rush into the lysosome causing it to burst. Water enters the cell causing it to sink, B. Which of the following best describes how the ratio of the density of stomata (stomata per mm^2) per CO2 concentration (ppm CO2) changes as the CO2 concentration increases? Some proteins are involved in cell recognition, helping the cell to communicate and interact with other cells. C. The pH of the cell will denature the hydrolytic enzymes. Question 8. The picture is an example of. save. However, the most critical organelles are: , The mitochondria is the site where cellular respiration occurs. The molecules does not contain OH\mathrm{O}-\mathrm{H}OH bonds. Thank you for being Super. Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. 45 Questions Show answers Question 1 30 seconds Q. D) Some plasmids contain antibiotic resistance genes. . Which way would the purple molecules move through the semi-permeable membrane? [RELATED: AP Biology Stand Alone Question Stratgies ]. Which of the following types of evidence will best support the researcher's claim, based on Figure 3-5? Subcellular and organelle components are especially important to know because they pop up throughout the year. Test your knowledge of the skills in this course. AP Biology Past Exam Questions AP Central. D. The lysosome will repair the membrane and not die. Cell Respiration Practice Questions AND ANSWER KEY for the questions are posted below. Phycobiliproteins are a complex of accessory pigments and proteins found in cyanobacteria but not in green algae. Sensory pathways begin with the reception of sensory information, in which the stimulus is detected by sensory cells. AP Bio Unit 2 Progress check questions and answers Terms in this set (30) A certain type of specialized cell contains an unusually large amount of rough endoplasmic reticulum (ER). Wednesday, 08 June 2022 / Published in thousand oaks police breaking news today. C) Yeast cells produce invertase, which is an enzyme that catalyzes the conversion of the disaccharide sucrose into glucose and fructose. AP Biology Practice Test: Unit 2 Cell Structure & Function. or. Based on Table 3-4, which of the following statements best clarifies how the data support the researcher's claim? , Cell size is a concern because surface area-to-volume ratios affect the ability of a biological system to obtain necessary resources, eliminate wastes, pull in or remove heat energy, and exchange materials with the environment. Which of the graphs below best represents the predicted change in mass over time of the dialysis bag in the beaker to which albumin was added? Based on Table 3-3, which of the following statements best helps justify the inclusion of test tube 5 in the experiment? The ratio DECREASES from 0.86 to 0.63, because fewer stomata are needed at higher CO2 concentrations. D. Chemical energy released by glycolysis Actual cell membranes have a variety of proteins embedded in the membrane that are absent in the artificial membrane. Which of the following actions will provide a negative control for the investigation based on Figure 3-1? A. A zinc ion binds to the ALAD active site, where it forms favorable interactions with the side chains of three amino acids. Which of the following statements best establishes a connection between the observation and the researcher's claim? Scoring GuidelinesStudent Performance Q&AScoring Statistics, Sample Responses Q1Sample Responses Q2Sample Responses Q3Sample Responses Q4, Scoring GuidelinesScoring CommentaryStudent Performance Q&AScoring Statistics, Scoring GuidelinesScoring CommentaryStudent Performance Q&A, Learning Opportunities for AP Coordinators. Click the card to flip Definition 1 / 30 The production and secretion of proteins Kyo Standard Resources Home AP Score Calculator AP Score Calculator AP Biology AP Calculus AB AP Calculus BC AP CHEMISTRY AP COMP GOV AP ENglish literature AP Macro-Economics AP Micro-Economics AP PHYSICS 1 AP PSYCHOLOGY AP . Which of the following functions is this cell type most likely specialized to perform? carbon monoxide, carbon dioxide, and solid carbon. 2 Save Share Copy and Edit Edit. Data questions on the AP Biology test are a series of questions about a single data set, which are commonly represented in graphs, charts, or as an experiment summary. D. The lysosome will repair the membrane and not die. Create engaging Jeopardy-style quiz games in minutes or. D. Chemical energy released by glycolysis. If water potential outside of the plant cell is higher than the water potential of the plant cells, C. If water potential outside of the plant cell is lower than the water potential of the plant cells, A.changing the permeability of the cell membrane, B. the opening and closing of the chloroplast, C. changing the permeability of the cell wall, Multiple Choice Practice for Cell Structure and Function Concepts. Energetics 3. Identify TWO topographic . COVID-19 Updates Suppose that in sheep, a dominant allele (B) produce black hair and a recessive allele (b) produce white hair. What should a team of students do next to obtain data that are more inclusive? Copyright Kaplan, Inc. All Rights Reserved. Biology. A. Radiant energy in the form of photons Unit 2: Cells & Cellular Transport Test Practice Test Unit 3: METABOLISM AND PLANT TEST Lecture & Video REVIEWs Click for Chapter 8 REVIEW Practice Questions unit_3_-_metabolism___plants_practice_test.pdf Download File FRQ PRACTICE IS BELOW. Another biologist alternatively hypothesizes that these types of molecules require channel and transport proteins that are embedded in the membrane in order to move across the membrane. Metformin activates AMPK in liver cells but cannot cross the plasma membrane. STOP! Before you look at the answers make sure you gave this practice quiz a try so you can assess your understanding of the concepts covered in unit 1. Repeat the process with other salt concentrations. The cecum evolved to have an important role in the digestion of protein, since it is shorter in species B and C than in species A and D. C. Species A is more closely related to species D than to species B, because A and D are both herbivores. Describe the Lewis structure of ketene (C2H2O)\left(\mathrm{C}_2 \mathrm{H}_2 \mathrm{O}\right)(C2H2O) and describe the hybridization states of the C\mathrm{C}C atoms. . B. Civil Rights SAQ. Chemical energy being stored as glycogen, https://www.kaptest.com/study/wp-content/uploads/2020/04/AP-Biology-Multiple-Choice-Practice-Questions.jpg, http://wpapp.kaptest.com/wp-content/uploads/2020/09/kaplan_logo_purple_726-4.png, AP Biology Multiple Choice Practice Questions. C. Species A is more closely related to species D than to species B, because A and D are both herbivores. Systems Interactions The Based on their observations, what should the researchers do to further clarify how the availability of the protein outside the cells affects the rate of endocytosis of the protein? Advanced level Physics Past papers MCQ review" 1995-2020 Sinhala Medium ISBN 978-955-54899-6-6. Q. the energy contained in the standing crop, the energy used by heterotrophs in respiration, the energy used by autotrophs in respiration. Browse AP Biology exam prep resources including unit reviews, big ideas, free resp. A zinc ion binds to the ALAD active site, where it forms favorable interactions with the side chains of three amino acids. Quizlet NAME 20 Multiple choice questions 1. Of the statements listed, the only one that logically follows is (A): in carnivores, the cecum becomes unnecessary, and starts to shorten. The reaction occurring in organelle B is cellular respiration, as indicated by the release of energy stored in the bonds of glucose. A) Organisms contain enzymes that lower the activation energies of specific chemical reactions Now, heat is transferred to refrigerant-134a until the temperature is 15^\circ{}C. A researcher claims that budding yeast are able to survive in different environments because they produce enzymes that allow them to use different molecules as sources of matter and energy. Click here for the practice questions: B. The cecum can become a vestigial structure in carnivores, since it is shorter in species B and C than in species A and D. Plant cell because it will become flaccid, C. Animal cell because it will become turgid, A. A) Young European flycatchers hatch from eggs when caterpillar biomass is available for the young birds to consume and convert into energy for growth. The form of energy released in aerobic respiration is chemical energy in the form of ATP (E IV). Hufflepuff_Hamilton. The multiple-choice section of the AP English Language and Composition exam is the first part of the exam; you will complete it before you start to write the three essays. Water will rush into the lysosome causing it to burst. Click the card to flip Definition 1 / 158 that they create and maintain internal environments different from the external environments Click the card to flip Flashcards Created by grreverol Terms in this set (158) The piston that is free to move has a mass of 12 kg and a diameter of 25 cm. Which of the following results best refutes the alternative hypothesis that selective permeability is a consequence of the cell wall? The production and secretion of proteins. Ap Bio Unit 6 Progress Check: MCQ Flashcards. Biology is brought to you with support from the Amgen Foundation. TheJovian67. Which of the following mechanisms do the water molecules most likely move into the large intestine? AP US History Exam: Period 6 Notes (1865-1898), AP Biology Stand Alone Question Stratgies. The AP biology exam assesses content from each of four big ideas for the course: 1. B. Incubate the cells in the presence of several different concentrations of the protein. If the total What additional procedure would best help determine whether these movements are due to active transport or passive transport? B. Hydrolytic enzymes leak into the cytoplasm causing digestion of vital proteins. Not on this quizlet: 16 It is known that f is increasing on the . Small, nonpolar molecules like nitrogen, oxygen, and carbon dioxide can freely pass through the membrane, while larger, polar molecules and ions need the help of proteins to cross the membrane. Which of the following functions is this cell type most likely specialized to perform? Which of the following statements best justifies the researcher's claim? The cecum can become a vestigial structure in carnivores, since it is shorter in species B and C than in species A and D. B. 9th - 12th grade . A 20-kg base satellite deploys three sub-satellites, each of which has its Which of the following best predicts what will happen to the lysosomal enzymes if the proteins that transport H+ ions from the cytosol into the lysosome are damaged? A) The thylakoid membrane is more permeable to carbon dioxide than to polar molecules. Unit 2 of AP Biology covers cell structure and function. The multiple choice questions are composed of two types of questions, stand alone and data questions. Thus, the efficiency = (219 kCal)/ (686 kCal) = 31.9%. Course and Exam Description Download AP Biology Course and Exam Description 24 terms . masses of sub-satellites A,B, and C are 4 kg, 6 kg, and 8 kg, respectively, Which of the following best predicts the immediate result of adding more substrate to the reaction mixture at the point indicated by the arrow in Figure 3-3? A deep dive into how life on Earth originated, adapted, and flourished. The cecum evolved to have an important role in the digestion of protein, since it is shorter in species B and C than in species A and D. Answer the following questions about the various processes depicted in the diagram and about the cell in which they are occurring. Start your own study with me session on our platform! The endosymbiotic theory is summarized below. One thing that helps cells to be able to take care of different processes inside the cell is the membrane and organelles that have membranes as well. That means it should take you around 22 minutes to complete 15 questions. AP Bio. (EU) , MKT3. Lesson 5 - Hydrometeorological and Coastal Pr, Did the tsarist policy toward minority groups, Functions of the hypothalamus and limbic syst, John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine, HESI Admission assessment A&P Practice test, ELA first 9 weeks unit 1 ( point of view part). Chemical energy being stored as glycogen D) The additional pigments absorb light at wavelengths that green algae cannot absorb; this may allow cyanobacteria to capture more light energy for photosynthesis than green algae can in certain areas. AP Biology Free Practice Question #2 Dichlorophenolindophenol (DPIP), an electron acceptor that changes from blue to clear when reduced, can be used to visually determine the rate of photosynthesis. B) Some antibiotics inhibit protein synthesis in bacteria cells. Each question will have 5 possible answers. B. C) Some plasmids cannot exist in a bacterial cell with certain other plasmids. Click here for the practice questions: AP Biology Unit 2 Multiple Choice Questions. and their velocities expressed in m/s are given by vA = 4i 2j + 2k, A) pH 4 buffer solution and hydrogen peroxide only. The 2020 free-response questions are available in theAP Classroom question bank. The endosymbiotic theory is where organelles that were once free-living prokaryotic cells became engulfed and serve a purpose now inside the cell. The first reaction in this organelle represents the light reactions, in which the suns energy is converted to chemical energy in the form of ATP (E II). Which of the following results, One hour after membrane fusion, best supports the alternative hypothesis that the cell membrane is a fluid mosaic? View Test_ Anatomy and Physiology Exam #1 (Ch. A) It will show whether the changes observed in group 1 depend on the metabolic activity of soil bacteria. Chloroplasts and some prokaryotes share similar photosynthetic reactions. A set of five additional test tubes were prepared and used as controls. If you saw a black sheep, you would be able to identify answer choices its phenotype for hair color its genotype for hair color the genotype of only one of its parents B. The light-independent reaction is where the Calvin-Benson cycle takes place and carbon is fixed to make simple sugars. The cecum is a portion of the large intestine located near the junction of the small intestine and the large intestine. The first reaction in this organelle represents the light reactions, in which the suns energy is converted to chemical energy in the form of ATP (E II). Organisms that reproduce sexually exhibit zygotic, gametic, or sporic meiosis. AP BIOLOGY > Unit 2 Resources A Practice Exam AND Answer Key have been posted below. The movement of molecules across the plasma membrane occurs through a process called membrane transport. Create your own unique website with customizable templates. The reaction occurring in organelle B is cellular respiration, as indicated by the release of energy stored in the bonds of glucose. It increases the surface area available for ATP production, which results in faster cell growth. AP Physics 1: Unit 5 Progress Check: MCQ Part, David N. Shier, Jackie L. Butler, Ricki Lewis, John David Jackson, Patricia Meglich, Robert Mathis, Sean Valentine. D) The total system that includes photosynthetic organisms and the Sun become less ordered over time. Based on the following information, which of the following conclusions is most plausible? Review of Timed AP Exam Practice #1 AP Biology Practice Questions-The Chemical Structures Of Life Full Guide to AP Prep Books: BARRON'S VS. The Citric Acid/Krebs Cycle happens in the matrix of the mitochondria, and oxidative phosphorylation, with the help of the electron transport chain, occurs in the inner membrane. Researchers investigated the effect of urea on the three-dimensional structure of a certain enzyme. A) Some antibiotics inhibit the synthesis of bacterial cell walls. The following table lists the diets of several vertebrates, as well as the average length of the cecum as measured in 20 individuals of that species. Unit 4 questions & answers for quizzes and tests - Quizizz Find and create gamified quizzes, lessons, presentations, and flashcards for students, employees, and everyone else. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. Cladogram Practice LOOK OVER AT LEAST ONE! AP Biology is an introductory college-level biology course. Unit 2 Population and Migration Patterns and Processes. Work for Kaplan If the pressure potential of the leaves increased to 1 Mpa, B. Welcome to Unit 2 AP Biology Multiple Choice Questions! 24 terms. D. Species B and C have a common ancestor, since the cecum in species B and C is approximately the same length. D) Evidence that the Cyanobacteria produced oxygen as a by-product of photosynthesis, D) Evidence that the Cyanobacteria produced oxygen as a by-product of photosynthesis. 23 terms. At 900C900^\circ C900C, KcK_cKc is 0.238. If the pressure potential of the leaves increased to 1 Mpa, B. Which of the following data would best refute this alternative hypothesis? Which of the following statements best helps justify the inclusion of group 2 as one of the controls in the experiment based on Table 3-2? In order for a cell to function properly, it's important for the internal environment to be maintained in a way that is conducive to the life and function of the cell. . Candidates should submit: A 2-3 page research plan, a cover letter describing interdisciplinary research experience and how it connects to the interests and goals of the Carbon cluster, and a 1-3 page teaching statement that includes specific discussion of accomplishments and plans for promoting inclusive and equitable education, outreach, or. The AP Biology Exam is 3 hours long and is divided into two sections: Section I (multiple-choice questions) and Section II (free-response questions). Students cultivate their understanding of biology through inquiry-based investigations as they explore topics like evolution, energetics, information storage and transfer, and system interactions. Based on the model presented in figure 1, which of the following changes will most likely result from a depletion of available ATP stores inside the cell? The enzyme did not appear to have a secondary or tertiary structure. In Fig. 30 seconds. C) Photosynthetic organisms use the organic molecules during photosynthesis for growth and repair. A researcher claims that the phycobiliprotein pigments in cyanobacteria allow the cyanobacteria to survive in certain aquatic niches better than green algae can. A) Function will be disrupted by adding the urea and regained by removing the urea. B. comparing the diploid and haploid forms of the organism. At high concentrations of acetylcholine, however, a large increase in the substrate concentration results in only a small increase in the reaction rate. AP Biology Unit 1 11th - 12th grade Played 2080 times 76% average accuracy Biology a year ago by jdmay 4 Save Edit Live modes Start a live quiz Asynchronous learning Assign homework 43 questions Preview Show answers Question 1 900 seconds Q. Organic chemistry is a science based on the study of answer choices functional groups. Browse AP Biology exam prep resources including unit reviews, big ideas, free response help, and practice questions. D) The total system that includes photosynthetic organisms and the Sun becomes less ordered over time. In the first part, you found that 30 moles of ATP has 219 kCal available, and the problem states that oxidation releases 686 kCal of energy. The two stages of photosynthesis are the light-dependent reaction and the light-independent reaction. The cecum evolved to have an important role in the digestion of protein, since it is shorter in species B and C than in species A and D. Information Storage and Transmission 4. Ap Bio Ch 18 Reading Guide Answers (PDF). Unit 6 MCQ Part B, #1 Study with Quizlet and memorize flashcards containing terms like Let f be the function given by f(x)=x2+1x+x+5. Why? D) The additional pigments absorb light at wavelengths that green algae cannot absorb; this may allow cyanobacteria to capture more light energy for photosynthesis than green algae can in certain areas. Others act as channels or pumps, allowing specific molecules to pass through the membrane. Water enters the cell causing it to swell, C. Water leaves the cell causing the solution to become more hypertonic, A. Embryonic development, (A), does not reveal either of these characteristics, nor does fertilization, (C). A.water enters the cell causing it to sink, B. Facts about the test: The AP Biology exam has 60 multiple choice questions and you will be given 1 hour 30 minutes to complete the section. With Super, get unlimited access to this resource and over 100,000 other Super resources. Facts about the test: The AP Biology exam has 60 multiple choice questions and you will be given 1 hour 30 minutes to complete the section. The endosymbiotic theory is summarized below. The Na+ concentration inside the cell will increase. Subtraction of which of the following will convert gross primary productivity into net primary productivity? , Chloroplasts are the site where photosynthesis occurs. Based on the data from graph 3-1, scientists claim that the reproductive behavior of European flycatchers is influenced by the availability of energy sources. A researcher claims that the incorporation of carbon dioxide into organic molecules during photosynthesis does not violate the second law of thermodynamics. AP Biology Unit 6 MCQ. The lysosomal enzymes will NOT become active, since there will be no active transport of H+ ions. A) The amount of product will increase until the reaction rate goes to zero. In this case, osmoregulation allows cells to maintain their internal solute balance. B) Function will be disrupted by adding the urea, but it will not be regained by removing the urea. C. The pH of the cell will denature the hydrolytic enzymes. Which of the following statements best justifies the use of the proposed modification as a way of creating an appropriate control for the investigation based on Figure 3-1? Dig into the structure and function of DNA, a theme that will recur through this course. Terms and Conditions B) ATP synthase activity depends on a proton gradient across the thylakoid membrane. Which prediction of the effect of this disruption of cellular compartmentalization is most likely correct? AP Biology Unit 6 2021. a year ago by . Why? Determine (a) the final pressure, (b) the change in the volume of the cylinder, and (c) the change in the enthalpy of the refrigerant-134a. At the instant shown, what is the angular ikea kitchen storage hacks. AP Bio: AP Classroom Unit 2 MCQ Flashcards. When the concentration of AChE in an aqueous solution is held constant, the rate of the reaction catalyzed by AChE increases with increasing concentrations of substrate. https://play.kahoot.it/#/k/9b845f6e-d42a-434e-abed-a59973d4ceda. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Based on the information presented, how does aldosterone most likely enter target cells? The average cell cycle time is greater for the root tips growing in compact sand than for the root tips After the completion of glycolysis, the rest of cellular respiration occurs in the mitochondria, given that oxygen is present. B. light reactions produce NADPH and ATP, while the Calvin cycle produces sugar. What is one example of an advantage of biodiversity in an ecosystem? Which of the following cellular deficiencies would most likely be related to these MT-ND1 mutations? A. Review the fundamentals of biochemistry, cell biology, genetics, evolution, and ecology, and develop scientific thinking skills as you explore the study of life. *The following questions were not written by CollegeBoard and although they cover information outlined in the AP Biology Course and Exam Description the formatting on the exam may be different. Question 2 Answer The correct choice is C 2023 Fiveable Inc. All rights reserved. A. the amount of energy required to raise the temperature of 1 gram of water by 1 degree C. the amount of energy released by metabolism of one gram of glucose. A researcher proposes a model to explain how enzyme-substrate interactions determine enzyme specificity. Grab some paper and a pencil to record your answers as you go. (B) is the opposite of what we expect; it would be logical if it played a prominent role in digesting carbohydrates. B) The amount of product will decrease until the reaction reaches its equilibrium point or the enzyme has been used up by the reaction. Have a test coming up? The plasma membrane is made of a phospholipid bilayer, composed of two layers of phospholipid molecules, with the hydrophobic tails facing inward and the hydrophilic heads facing outward. the system is brought to equilibrium at 900C900\circ C900C. A. All gametes are unicellular, ruling out (D). D) Carbon fixation in the Calvin-Benson cycle takes place in the stroma of chloroploasts. Begin your AP Biology journey with an introduction to the basic building blocks and necessary components of life: water, necessary elements, and biological macromolecules. The cell is unable to complete reactions related to electron transport and ATP production. AP Biology Multiple Choice Practice Questions. Because the question specifies that oxygen is required, the process depicted must show aerobic respiration rather than glycolysis. C) Function will be gained by adding the urea and disrupted by removing the urea. Which cellular component will be found in the widest range of organisms in the sample? Acetylcholinesterase (AChE) is a protein that catalyzes the conversion of acetylcholine to acetate and choline. 24 terms. This unit is all about the cell and parts of the cell! The engulfed prokaryote then formed an Endosymbiotic relationship with the eukaryotic host. Privacy Policy A) Function will be disrupted by adding the urea and regained by removing the urea. 56% average accuracy. At low concentrations of acetylcholine, a small increase in the substrate concentration results in a large increase in the reaction rate. Based on Figure 3-1, which of the following statements best predicts the effect that a change from a moderately acidic environment (pH near 6) to a basic environment will have on peroxidase activity? Cell Resp. The ribosome, since all organisms need to synthesize proteins. C) The experiment can be repeated without guaiacol, which will reveal the effect of guaiacol on the reaction rates. Link to google doc with pictures: https://docs.google.com/document/d/1PwIJR9rrGvUy6aj5o4boqlzjh2HPbukkgoSELLUmvT0/edit. (C) The data on cecum length and diet are insufficient to draw conclusions about the relatedness of species, so rule out (C) and (D). One way to determine the type of life cycle an organism has is by. Below we provide practice questions for each type and strategies to find the correct answer in the alloted time. Clarify math Math is often viewed as a difficult and dry subject, but it can be made much simpler by breaking it down into smaller, more manageable pieces. Which of the following claims about the effects of the valinomycin treatment is best supported by the data presented in the table? A) Young European flycatchers hatch from eggs when caterpillar biomass is available for the young birds to consume and convert into energy for growth. Which of the following conclusions about increasing the number of folds in the inner mitochondrial membrane is best supported by the results of the experiment? ap chemistry unit 8 progress check mcq answers. Based on Figure 3-4, which of the following statements provides reasoning that supports the claim that brown fatty tissue keeps an animal warm? C. Chemical energy in the form of ATP The endosymbiotic theory is where organelles that were once free-living prokaryotic cells became engulfed and serve a purpose now inside the cell. Cell membranes, nucleic acids, mitochondria, A.rough endoplasmic reticulum, nucleus, lysosome, C. Golgi complex, rough endoplasmic reticulum, ribosomes, D. Golgi complex, mitochondria, chloroplast. Cluster Hires in Carbon Electronics at NC State University in . There are different types of transport proteins, including channels, pumps, and carriers, which work to transport molecules in different ways. Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions. B) The uncoupling protein in this tissue reduces the proton gradient across the membrane and thus produces heat to warm the animal without ATP production. By PASSIVE transport from an area of LOW osmolarity to an area of HIGH osmolarity. 2023 Fiveable Inc. All rights reserved. Which of the following statements best helps justify the researcher's claim? CA Privacy Policy, A. light reactions produce sugar, while the Calvin cycle produces O, D. the Calvin cycle produces both sugar and O, Test Your Skills, Take a Practice AP Biology Quiz.