Are you looking to improve your typing speed and accuracy? Look no further. A free online typing practice test is the perfect tool to supercharge your keyboard skills. We’ve all heard the saying “practice makes perfect,” and when it comes t...Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.Welcome to the unit test — where you get to test your skills for the entire unit! 10 questions • 9 - 18 minutes. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for ...AP® Biology | Unit 8 Assessment. This assessment tests standards from Unit 8 only. A four-function calculator should be available for you to use while taking this assessment. 23 questions. Not started. Review the processes and principles behind living organisms and their ecosystems through exam prep practice questions on scientific inquiry and ...There are 12 recommended labs in the AP Biology curriculum. Below are official notes on each of these labs for you to review. You can also view all of the College Board’s AP Bio classroom resources on the College Board's website. Lab 1: Diffusion and Osmosis. Lab 2: Enzyme Catalysis.There are 12 recommended labs in the AP Biology curriculum. Below are official notes on each of these labs for you to review. You can also view all of the College Board’s AP Bio classroom resources on the College Board's website. Lab 1: Diffusion and Osmosis. Lab 2: Enzyme Catalysis.About the Exam. The AP Biology Exam will test your understanding of the biological concepts covered in the course units, as well as your ability to utilize the scientific method and analyze data. You are allowed to use a four-function calculator (with square root), scientific, or graphing functions throughout exam.Practice Questions. ... Put your AP Bio: Unit 1 knowledge to the test!Understand what topics you need to study more. Start Quiz. Additional Resources. Study Tools. Download the 2024 AP Biology Cheat Sheet PDF. 1 min read. 2024 AP Biology Exam Guide.This assessment tests standards from Unit 8 only. A four-function calculator should be available for you to use while taking this assessment. 23 questions. Not started. Review the processes and principles behind living organisms and their ecosystems through exam prep practice questions on scientific inquiry and models in Albert's AP Biology ...Correct Answer. B. Multiple units of macromolecules. Explanation. A polymer is a large molecule made up of repeating subunits called monomers. These monomers join together to form a long chain, resulting in a macromolecule. Therefore, the correct answer is "Multiple units of macromolecules." Rate this question:Study with Quizlet and memorize flashcards containing terms like 1) The smallest cell structure that would most likely be visible with a standard (not superresolution) researchgrade light microscope is a _____. A) mitochondrion B) microtubule C) ribosome D) microfilament, 2) The advantage of light microscopy over electron microscopy is that _____. A) light microscopy provides for higher ...A. Yeast and mammals share a recent common ancestor. B. Early versions of cell communication mechanisms still used today must have evolved before the first multicellular organisms. C. Signaling molecules first evolved in multicellular eukaryotes. D. All cell communication systems are used for sexual reproduction. Question 2.4.8 (37 reviews) Get a hint Which of the following claims about the TYR, TRP2, and TRP1 mammalian genes is most likely to be accurate? Click the card to flip 👆 The TYR, TRP2, …Unit 6 Gene Expression and Regulation Student Notes Page 2 Unit 6 Student Notes Table of Contents A. History of DNA Research —Pages 3-10 B. Proteins or DNA: Which is the Genetic Molecule—Page 3-6 C. DNA Structure—Pages 8-11 D. DNA Replication—Pages 11-15 E. Telomeres—Pages 15-17 F. The Central Dogma of Genetics—Page 17The AP Biology Unit 2: Cell Structure and Function Complete Unit includes presentations, a student notes packet with a variety of worksheets, projects, labs, and activities, quizzes and a unit test, answer keys, and …The structure of DNA consists of two complementary strands, which are connected by a series of chemical bonds between the bases of each strand. These bases, adenine (A), thymine (T), guanine (G), and cytosine (C), form the "rungs" of the DNA ladder and are responsible for encoding the genetic information. In some cases, RNA, or …There are 12 recommended labs in the AP Biology curriculum. Below are official notes on each of these labs for you to review. You can also view all of the College Board’s AP Bio classroom resources on the College Board's website. Lab 1: Diffusion and Osmosis. Lab 2: Enzyme Catalysis.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ... 6.2 Replication. Replication is the process in which genetic information is passed on to the next generation. In eukaryotes, this process takes place in the nucleus of the cell. Because prokaryotes do not have a nucleus, this process occurs in the cytoplasm. This is a multi-step process that employs the help of multiple enzymes.Study Guides by Unit. 🧪 Unit 1 – Chemistry of Life. 🧬 Unit 2 – Cell Structure & Function. 🔋 Unit 3 – Cellular Energetics. 🦠 Unit 4 – Cell Communication & Cell Cycle. 👪 Unit 5 – Heredity. 👻 Unit 6 – Gene Expression & Regulation. 🦍 Unit 7 – Natural Selection. 🌲 Unit 8 – Ecology.Nov 15, 2021 · FRQ Practice Submission 2. a) The most likely gene to encode a protein that is an essential component of glycolysis is gene G. The reasoning is that it is the only Gene that is actively producing mRNA in all tissues. b) Just because the gene is present does not mean it is being translated and transcribed. It is most likely methylated, or super ... A. Yeast and mammals share a recent common ancestor. B. Early versions of cell communication mechanisms still used today must have evolved before the first multicellular organisms. C. Signaling molecules first evolved in multicellular eukaryotes. D. All cell communication systems are used for sexual reproduction. Question 2.Subscription Needed. Shmoop Practice Tests (free trial available, $24.68 a month for subscription) A subscription to Shmoop will get you access to a diagnostic test plus five full AP Biology practice tests (including both …Review AP Biology with us! We will be covering Unit 1: The Chemistry of Life with Tiffany Jones from AP Bio Penguins. #apbio #apbiology #apexamsAP Bio Pengui...A. Plant cells are capable of having a much higher surface-to-volume ratio than animal cells. B. Plant cells have a much more highly convoluted (folded) plasma membrane than animal cells. ) the basic functions of plant cells are very different from those of animal cells.For the last few years, the AP® Biology exam has held a steady passing rate of over 60%. The pass rate from the 2022 exam was the highest in many years! Test-takers in the top ~30% typically received a 4 of 5 on this exam, with 10-15% receiving the maximum score of 5. The 2022 AP® Biology exam yielded a mean score of 3.11.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators ... While agriculture is the growing of plants as crops and animals for food, biology is the study of life, which broadly divides into plants and animals, according to Reference.com. The two relate closely and intertwine often. The best agricul...Science Biology Genetics AP Biology Unit 6 Test 4.2 (6 reviews) What enhances the expression of a gene? Click the card to flip 👆 the attachment of RNA polymerase to DNA Click the card to flip 👆 1 / 65 Flashcards Learn Test Match Q-Chat Created by theCirame Barrons, Chapter Qs, Genetic Engineering, random others Terms in this set (65)Subscription Needed. Shmoop Practice Tests (free trial available, $24.68 a month for subscription) A subscription to Shmoop will get you access to a diagnostic test plus five full AP Biology practice tests (including both …Welcome to Unit 5 AP Biology Multiple Choice Questions!Grab some paper and a pencil 📄 to record your answers as you go. You can see how you did on the Unit 5 Practice Questions Answers and Review sheet once you're done. Don't worry, we have tons of resources available if you get stumped 😕 on a question.A new type of blood test that checks for cancer signals in healthy people is being marketed and sold. But it's still unclear whether these screening tests will make any difference in cancer death rates. Source: AP News Presented By Air Date...worth 10 points each. Questions 3–8 are short free-response questions that require about 6 minutes each to answer. Questions 3–5 are worth 4 points each and questions 6–8 are worth 3 points each. Read each question carefully and completely. You are advised to spend the 10-minute reading period planning your answers. AP®︎/College Biology 10 units · 54 skills. Unit 1 Chemistry of life. Unit 2 Cell structure and function. Unit 3 Cellular energetics. Unit 4 Cell communication and cell cycle. Unit 5 Heredity. Unit 6 Gene expression and regulation. Unit 7 Natural selection. Unit 8 Ecology.Use our free quizzes to practice for AP Biology - Unit 1! Home Links. Volunteer. Outreach Team Content Team Application Blog Team Join Us. Resources. ... AP Biology - Unit 6. AP Biology - Unit 7. AP Biology - Unit 8. AP Calculus BC - Unit 1. AP Calculus BC - Unit 5 & 6. AP Chemistry - Unit 1 & 2.Which of the following claims best explains why keratinocytes do not produce melanin? Keratinocytes do not express the MITF gene. Which of the following pieces of evidence would best support the researchers' claim above? When researchers applied a drug that activates adenylyl cyclase to the mutant mice's ears, the level of melanin increased.Like other AP tests, AP Biology has two parts: ... Unit 6: Gene Expression and Regulation Unit 7: Natural Selection Unit 8: Ecology . Charles Darwin married his first cousin. ... You should balance your time relatively evenly between studying the material and taking practice tests. In AP Bio, ...Study with Quizlet and memorize flashcards containing terms like 1) The smallest cell structure that would most likely be visible with a standard (not superresolution) researchgrade light microscope is a _____. A) mitochondrion B) microtubule C) ribosome D) microfilament, 2) The advantage of light microscopy over electron microscopy is that _____. A) light microscopy provides for higher ...The AP Biology Unit 6: Gene Expression and Regulation Complete Unit includes presentations, a student notes packet with a variety of worksheets, projects, labs, and activities, quizzes and a unit test, answer keys, and much more to help your students master the material and be prepared to pass the AP Exam. $ 40.00.AP BIO Unit 1 Released FRQs 2 0 0 9 B # 3 . 2 0 0 9 B # 3 A n sw e r K e y . 2 0 0 9 B # 4 . 2 0 0 9 B # 4 A n sw e r K e y . ... The relationship of structure to function is one of the major themes In biology. For three of the following structure/function pairs, describe the structure and then explain how the function is related to the1 pt. Water is polar because... The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. The molecule has two poles, at which the it is colder than other regions of the molecule. The unequal sharing of electrons gives the water molecule a slight ...The ψ of a region is calculated by adding the solute potential (ψs) and the pressure potential (ψp). The ψs will be 0 or negative, and the ψp will be positive, 0, or negative. The ψ will always be negative. Calculate the water potential for region A and region B. Then, state which region water will go towards.What We Review The 6 Science Practices AP® Biology Promotes The Big Ideas of AP® Biology AP® Biology Practice Tests Unit 1: Chemistry of Life Unit 2: Cell Structure and Function Unit 3: Cellular Energetics Unit 4: Cell Communication and Cell Cycle Unit 5: Heredity Unit 6: Gene Expression and Regulation Unit 7: Natural Selection Unit 8: EcologyAP®︎/College Biology 10 units · 54 skills. Unit 1 Chemistry of life. Unit 2 Cell structure and function. Unit 3 Cellular energetics. Unit 4 Cell communication and cell cycle. Unit 5 Heredity. Unit 6 Gene expression and regulation. Unit 7 Natural selection. Unit 8 Ecology.Unit 1 Chemistry of life. Unit 2 Cell structure and function. Unit 3 Cellular energetics. Unit 4 Cell communication and cell cycle. Unit 5 Heredity. Unit 6 Gene expression and …May 10, 2023 · Study Guides by Unit. 🧪 Unit 1 – Chemistry of Life. 🧬 Unit 2 – Cell Structure & Function. 🔋 Unit 3 – Cellular Energetics. 🦠 Unit 4 – Cell Communication & Cell Cycle. 👪 Unit 5 – Heredity. 👻 Unit 6 – Gene Expression & Regulation. 🦍 Unit 7 – Natural Selection. 🌲 Unit 8 – Ecology. Unit 1: Chemistry of Life. You'll learn about water's role as the basis of life and the functions of macromolecules like lipids and proteins. Topics may include: The structure and chemical properties of water. The makeup and properties of macromolecules. The structure of DNA and RNA. On The Exam. 8%-11% of exam score.013 - Photosynthesis & Respiration. 014 - Environmental Matter Exchange. 015 - Cell Membranes. 016 - Transport Across Cell Membranes. 017 - Compartmentalization. 018 - Positive & Negative Feedback Loops. 019 - Response to External Environments. 020 - Biotic and Abiotic Factors. 021 - Homeostatic Evolution.Question 2. There are several emergent properties of water that contribute its powerful affect on living organisms. These emerging properties are mostly due to: A. The abundance of water on Earth. B. The hydrogen bonds linking water molecules together. C. Water’s ability to moderate pH.May 10, 2023 · Study Guides by Unit. 🧪 Unit 1 – Chemistry of Life. 🧬 Unit 2 – Cell Structure & Function. 🔋 Unit 3 – Cellular Energetics. 🦠 Unit 4 – Cell Communication & Cell Cycle. 👪 Unit 5 – Heredity. 👻 Unit 6 – Gene Expression & Regulation. 🦍 Unit 7 – Natural Selection. 🌲 Unit 8 – Ecology. Unit 1: Chemistry of Life. You’ll learn about water’s role as the basis of life and the functions of macromolecules like lipids and proteins. Topics may include: The structure and chemical properties of water. The makeup and properties of macromolecules. The structure of DNA and RNA. On The Exam. 8%–11% of exam score. AP Review Guide Practice Exam. AP Review Calendar ... Unit Review Games. Insta-Review Games. Topic TikToks. Unit 1. Unit 2. Unit 3. Unit 4. Unit 5. Unit 6. Unit 7. Unit 8. Science Practices. CED Topic TikToks. Unit 1. Unit 2. Unit 3. Unit 4. Unit 5. Unit 6. Unit 7. Unit 8 . 2022-2023 Sessions: Session 1: How to Succeed in AP Biology Session 2 ...AP Biology Unit 4: Cell Communication & Cell Cycle Topics - Cell Communication, Introduction to Singal Transduction, Singal Transduction, Changes to Signal Transduction Pathways, Feedback, Cell Cycle, Regulation of Cell Cycle Directions - For each question, choose the best answer (unless otherwise stated) Test Period - You have 22 minutes 30 seconds to answer 30 questionsGCE A/L Biology Unit Test papers( Nalanda College) Sinhala Medium - අ.පො.ස උසස් පෙළ ජීව විද්යාව ඒකක පරීක්ෂණ පත්ර ... (37) Practice Maps (6) Programming Sinhalen (12) Science short notes (5) SL Maps for Exams (17) Tution classes (1) World Maps for Exams (11) ...In part (a) test takers were asked to demonstrate understanding of Objective ENE-2.C from the AP Biology Course and Exam Description) and explain why transport of an ion across a membrane results in the loss of water from the cell (Learning Objective ENE-2.H).. a small, double stranded extrachromosomal DNA molecule often carrying genes for antibiotic resistance and found in bacteria and sometimes present in archaea and eukaryotic organisms. Identify two functions of plasmids. F plasmids contain genes that code for the production of sex pili and enzymes required for conjugation.Unit 6 FRQ (Genetic Expression) with Feedback. 4 min read • november 15, 2021. Caroline Koffke. View student writing samples for the 2019 AP Biology FRQ and corresponding feedback provided by Fiveable teacher Caroline Koffke. It is important to learn from how other students responded to improve one's own FRQ writing.The new course will add more videos to our existing AP® Biology content. It will also include new exercises, quizzes, and unit tests that are fully aligned with the AP® Biology Course Description. You might have some questions, so the team has anticipated a few here. If you have others, post them in the comments below!A. They increase the heat in the cell, and therefore speed up the reaction by allowing reactants to attain the transition state more often. B. Enzymes speed up reactions by changing the amount of free energy available in the cell for reactions. C. Enzymes make endergonic reactions exergonic. D.Subscription Needed. Shmoop Practice Tests (free trial available, $24.68 a month for subscription) A subscription to Shmoop will get you access to a diagnostic test plus five full AP Biology practice tests (including both …The AP Biology Unit 6: Gene Expression and Regulation Complete Unit includes presentations, a student notes packet with a variety of worksheets, projects, labs, and activities, quizzes and a unit test, answer keys, and much more to help your students master the material and be prepared to pass the AP Exam. $ 40.00.A. The yellow-bellied toad ( Bombina variegata) and the fire-bellied toad ( B. bombina) have overlapping geographic ranges, but hybrids between the two species have high rates of embryonic mortality. The rice species Oryza sativa and O. glaberrima can be crossed to produce F1 hybrid plants, but these hybrid plants produce empty pollen grains ...1 pt. Water is polar because... The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. The molecule has two poles, at which the it is colder than other regions of the molecule. The unequal sharing of electrons gives the water molecule a slight ...Study Guides by Unit. 🧪 Unit 1 – Chemistry of Life. 🧬 Unit 2 – Cell Structure & Function. 🔋 Unit 3 – Cellular Energetics. 🦠 Unit 4 – Cell Communication & Cell Cycle. 👪 Unit 5 – Heredity. 👻 Unit 6 – Gene Expression & Regulation. 🦍 Unit 7 – Natural Selection. 🌲 Unit 8 – Ecology.AP® Biology | Unit 8 Assessment. This assessment tests standards from Unit 8 only. A four-function calculator should be available for you to use while taking this assessment. 23 questions. Not started. Review the processes and principles behind living organisms and their ecosystems through exam prep practice questions on scientific inquiry and ...Download File. AP Review Guide Practice Exams. Below are two different practice exams. The Review Guide Practice Exam has all of the questions from 2012 CED & 2020 CED. The 2013 AP Bio Practice Exam is the nationally released AP Practice Exam. (Note: They both are based on the old CED so there are questions that are no longer applicable). AP Classroom is a platform that allows teachers to create customized question banks for AP Biology and other subjects. Teachers can select from a variety of question types, difficulty levels, and topics to assess their students' learning and prepare them for the AP exam. AP Classroom also provides feedback and reports to help teachers monitor student progress and identify areas for improvement.In Unit 6 of AP Bio, you will delve into the field of nucleic acids and gene expression.You will gain a comprehensive understanding of the structures and functions of DNA and RNA, and how they relate to an individual's genotype and phenotype. 🧬. Additionally, you will learn about the processes of protein synthesis, including …a. the pH goes down. b. the number of H+ ions increases. c. the pH remains the same. d. the pH goes above 7. the number of electrons in the outermost energy level. the number of bonds that an atom will make with other atoms is related to. a. the number of electrons in the innermost shell.Unit test. Loading... Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.All of the chemical reactions that take place inside cells, including those that use energy and those that release energy, are the cell’s metabolism. Figure 6.2 Most life forms on earth get their energy from the sun. Plants use photosynthesis to capture sunlight, and herbivores eat those plants to obtain energy. B. Cells divide one time in the cell cycle. Cells divide two times in meiosis. C. The cell cycle produces cells genetically identical to the parent cell. Meiosis produces cells genetically different from the parent and from each other. D. In the cell cycle, crossing over takes place during metaphase.AP®︎/College Biology 10 units · 54 skills. Unit 1 Chemistry of life. Unit 2 Cell structure and function. Unit 3 Cellular energetics. Unit 4 Cell communication and cell cycle. Unit 5 Heredity. Unit 6 Gene expression and regulation. Unit 7 Natural selection. Unit 8 Ecology.B. Cells divide one time in the cell cycle. Cells divide two times in meiosis. C. The cell cycle produces cells genetically identical to the parent cell. Meiosis produces cells genetically different from the parent and from each other. D. In the cell cycle, crossing over takes place during metaphase.Subject. 🧬 AP Biology. Study Guides by Unit. 🧪 Unit 1 – Chemistry of Life. 🧬 Unit 2 – Cell Structure & Function. 🔋 Unit 3 – Cellular Energetics. 🦠 Unit 4 – Cell Communication & Cell Cycle. 👪 Unit 5 – Heredity. 👻 Unit 6 – Gene Expression & Regulation.AP Biology Unit 1 Practice Exam: Evolution Name:_____ ____ 1) During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result."AP Biology - Evolution Unit Practice Exam. Multiple Choice. Identify the choice that best completes the statement or answers the question. ____ 1) Catastrophism, meaning the regular occurrence of geological or meteorological disturbances (catastrophes), was Cuvier's attempt to explain the existence of . A) evolution. B) the fossil record.Study sets. AP Biology: Unit 6. 39 terms Images 4 (1) Lisa_Gathright Teacher. Preview. AP Biology UNIT-6. 100 terms Images 4.8 (13) lcaras Teacher. Preview.Click here for the practice questions: AP Bio Unit 7 Multiple Choice Questions. Image courtesy of Pixabay. 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 following questions refer to the following DNA strand and table of codons. 3' TAG TTC AAA CCG CGT AAC ATT 5'. The mRNA transcribed from the DNA would read. 5' AUC AAG UUU GGC GCA UUG UAA 3'. Figure 1. Protein synthesis in a prokaryotic cell. Which of the following best describes a characteristic of the process shown in Figure 1 that is ...Environmental factors influence the expression of the genotype in an organism. The student can use mathematics appropriately. The student can work with scientific explanations and theories. AP BIOLOGY RESOURCES 1. Study Guides and Review 2. Math Practice 3. Evolution 4. Ecology 5. Chemistry of Life 6.AP Biology Practice Exams Free Response Notes Videos Study Guides. We have links to all of the best online AP Biology practice exams. These resources will provide …While agriculture is the growing of plants as crops and animals for food, biology is the study of life, which broadly divides into plants and animals, according to Reference.com. The two relate closely and intertwine often. The best agricul...A. Plant cells are capable of having a much higher surface-to-volume ratio than animal cells. B. Plant cells have a much more highly convoluted (folded) plasma membrane than animal cells. ) the basic functions of plant cells are very different from those of animal cells.United Airlines also plans to expand its offering to more U.S. cities and add international testing sites, as well. As more Americans return to the skies, one of the biggest challenges continues to be locking in a COVID-19 test — a requirem...This AP Biology live stream review session is not affiliated with the review sessions being hosted on the Advanced Placement YouTube channel.Link to Presenta...AP Biology Math Review. Be sure to check out these 15 grid-in practice problems. Does a great job of covering the most important math concepts. It’s a PDF file and includes detailed solutions! A complete listing of all the best AP Biology practice tests. Hundreds of free practice questions covering all AP Bio topics. Like other AP tests, AP Biology has two parts: ... Unit 6: Gene Expression and Regulation Unit 7: Natural Selection Unit 8: Ecology . Charles Darwin married his first cousin. ... You should balance your time relatively evenly between studying the material and taking practice tests. In AP Bio, ...Discover the best software QA company in the United States. Browse our rankings to partner with award-winning experts that will bring your vision to life. Development Most Popular Emerging Tech Development Languages QA & Support Related art...Welcome to the Biology library! Biology is the study of life. Here, you can browse videos, articles, ... Unit 6. Elements of life. Unit 7. Energy and enzymes. Unit 8. Structure of a cell. Unit 9. More about cells. ... Unit 35: AP free response worked examples. 2015 Free response worked examples: AP free response worked examples.AP Biology Diagnostic Test | 13 w does the composition of bones in human babies 28. Ho differ from that in adults? (A) The bones of babies contain only collagen and calcium-phosphate crystals. (B) 6.Cartilage is present in the bones of babies as part of developmental growth. (C) Androgens and estrogens promote bone growth in babies.Answer: In a hypertonic environment, the concentration of solutes is higher outside of the cell. To reach equilibrium, a net flow of water will exit the cell, causing the cell to lose water and become smaller in volume. 📄 Study AP Biology, Unit 2.8: Tonicity and Osmoregulation. 12. A plant cell and animal cell enter a hypotonic environment.In addition to the AP Biology Practice Tests and AP Biology tutoring, you may also want to consider taking some of our AP Biology Diagnostic Tests. The AP Biology exam is divided into two sections. The first section consists of 63 multiple-choice questions and 6 mathematical grid-in responses. Study Guides by Unit. 🧪 Unit 1 – Chemistry of Life. 🧬 Unit 2 – Cell Structure & Function. 🔋 Unit 3 – Cellular Energetics. 🦠 Unit 4 – Cell Communication & Cell Cycle. 👪 Unit 5 – Heredity. 👻 Unit 6 – Gene Expression & Regulation. 🦍 Unit 7 – Natural Selection. 🌲 Unit 8 – Ecology.AP® BIOLOGY 2017 SCORING GUIDELINES Question 6 Figure 1. Comet assay to detect double-stranded breaks in DNA A comet assay is a technique used to determine the amount of double-strand breaks in DNA (DNA damage) in cells. The nucleus of an individual cell is placed on a microscope slide coated with an agarose gel.1. Keep track of time. You will have 90 minutes to complete the 6 free response questions on the AP® Biology exam. Because each of the two long-answer questions are more extensive and together are worth over half of the free response section (10 points each), you should plan to spend about 20 minutes on each.AP Biology Past Exam Questions Free-Response Questions Download free-response questions from past exams along with scoring guidelines, sample responses from exam takers, and scoring distributions.