[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-311305-105":59,"doc-detail-311305-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","ap-biology-section-ii-time-1-hour-and-30-minutes-free-response-questions","AP Biology - Section II - Time 1 Hour and 30 Minutes - Free-Response Questions","","AP Biology Section II Free-Response Questions provides instructions and pacing guidance for a 1 hour 30 minutes exam format with six questions. Students must read and respond carefully, label diagram parts, and ensure only work in the free-response booklet is scored. A calculator is allowed, reference information can be used, and students can navigate between questions until time expires. The document includes biology prompts about nucleotides, stomata control, dinucleoside polyphosphates Ap4A and Cp4C, DORN1 receptors, and predicted transcription outcomes.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/ap-biology-section-ii-time-1-hour-and-30-minutes-free-response-questions/311305/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/ap-biology-section-ii-time-1-hour-and-30-minutes-free-response-questions/311305.png","ImageObject",300,407,{"name":92,"@type":93},"Patrick","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-31","2026-09-20",true,{"@type":102,"interactionType":103,"userInteractionCount":52},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How long is Section II of the AP Biology free-response exam, and how many questions are included?","Question",{"text":112,"@type":113},"Section II lasts 1 hour and 30 minutes and includes 6 questions.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What must students do with labeled diagrams and where is graded work recorded?",{"text":117,"@type":113},"Students may use labeled diagrams to support responses, but a diagram alone does not earn credit. 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College Board, Advanced Placement, AP, AP Central, and the acorn logo are registered [trademarks of College Board. Visit College Board on the web: collegeboard.org](trademarks of College Board. Visit College Board on the web: collegeboard.org).  \nAP Central is the official online home for [the AP Program: apcentral.collegeboard.org](the AP Program: apcentral.collegeboard.org).  \nBIOLOGY  \nSECTION II  \nTIME – 1 HOUR AND 30 MINUTES  \nDirections:  \nSection II has 6 questions and lasts 1 hour and 30 minutes.  \nRead each question carefully and completely. Do not spend time restating the questions or providing more than the number of examples called for. Labeled diagrams may be used to supplement your response(s), but a diagram alone will not receive credit.  \nYou may use the available paper for scratch work and planning, but only work written in the freeresponse booklet will be scored. Any work done on scratch paper will not be scored. Label parts (e.g., A, B, C) and sub-parts (e.g., i, ii, iii) as needed. Use a pencil or a pen with black or dark blue ink to write your responses.  \nA calculator is allowed in this section. You may use a handheld calculator that is approved for this exam or the calculator available in this application. Reference information, including equations and formulas, can be used throughout the exam. A digital version is available in this application. You may pace yourself as you answer the questions in this section, or you may use these optional timing recommendations:  \nQuestions 1 and 2 are long free-response questions, and it is suggested that you spend about 25 minutes on each. Questions 3 through 6 are short free-response questions, and it is suggested that you spend about 10 minutes on each.  \nYou can go back and forth between questions in this section until time expires. The clock will turn red when 5 minutes remain—the proctor will not give you any time updates or warnings.  \nNote: This exam was originally administered digitally. It is presented here in a format optimized for teacher and student use in the classroom.  \nDuring the AP Exam administration, students have access to reference information. To see the reference information for this course, please visit AP Central:  \n[https://apcentral.collegeboard.org/exam-administration-ordering-scores/administering-exams/](https://apcentral.collegeboard.org/exam-administration-ordering-scores/administering-exams/)[ ](https://apcentral.collegeboard.org/exam-administration-ordering-scores/administering-exams/)[subject-specific/reference-information](subject-specific/reference-information)  \nThe following information applies to all parts.  \n1. Molecules known as dinucleoside polyphosphates, a type of nucleotide, are signaling molecules that accumulate in plant cells during dry or stressful conditions.  \nPart A  \nDescribe the three structural components of a nucleotide.  \nThe following information applies to parts B, C, and D.  \nStomata are pores on the surface of leaves that open when exposed to light and regulate the flow of carbon dioxide, oxygen, and water vapor in and out of a plant. In response to dry environmental conditions, many plants close their stomata, which reduces water loss. Scientists hypothesized that the dinucleoside polyphosphates Ap4 A and Cp4 C bind to DORN1 receptors on the plasma membrane of plant cells and initiate signaling cascades that cause stomata to close. The scientists exposed plants to light to open the stomata and then placed samples ofthe leaves in buffer alone or in buffer containing one of three different compounds:  \nAp4 A , Cp4 C, or abscisic acid (ABA), a molecule that causes stomata to close.  \nThe scientists measured the size of the stomata in each sample and calculated their sizes relative to the size of the stomata in the sample kept in buffer alone, as shown in Figure 1.  \nFigure 1. Effect of Ap4 A , Cp4 C, and ABA on Relative Stomatal Size  \n(Erro","cbCairZz1bIQaUHV","https://ap.wps.com/l/cbCairZz1bIQaUHV","pdf",374570,15,"English","# Instructions\n## Timing and Question Structure\n## Response and Scoring Rules\n## Allowed Tools and Reference Information\n# Question 1\n## Nucleotide Structure Components\n# Questions 2 and Beyond\n## Stomata Regulation Experiments (Ap4A, Cp4C, ABA)\n## Dependent Variable and Control Use\n## DORN1 Mutation Comparisons\n## Predicting Transcription Changes","[{\"question\":\"How long is Section II of the AP Biology free-response exam, and how many questions are included?\",\"answer\":\"Section II lasts 1 hour and 30 minutes and includes 6 questions.\"},{\"question\":\"What must students do with labeled diagrams and where is graded work recorded?\",\"answer\":\"Students may use labeled diagrams to support responses, but a diagram alone does not earn credit. Only work written in the free-response booklet is scored; scratch work is not graded.\"},{\"question\":\"What is the role of the DORN1 receptor in the experiments described?\",\"answer\":\"The document states that DORN1 receptors trigger signaling cascades that lead to stomata closure and increase transcription of genes involved in plant defenses.\"}]","AP Biology - Section II - Time 1 Hour and 30 Minutes - Free-Response Questions | PDF",1789894114,38]