[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-642360-105":59,"doc-detail-642360-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","biology-970052-paper-5-planning-analysis-and-evaluation-modified-language","BIOLOGY 9700/52 - Paper 5 Planning, Analysis and Evaluation - Modified Language","","Cambridge International Biology 9700/52 Paper 5 (Planning, Analysis and Evaluation), May/June 2018, modified language edition, provides exam instructions and a structured investigation question on the light-dependent stage of photosynthesis. Using DCPIP as an indicator, the task guides candidates to interpret qualitative results, justify control and variable setups, explain apparatus roles, identify independent and dependent variables, and describe a detailed method to collect data as light intensity changes. Marks and timings are specified for each part.",{"@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/biology-970052-paper-5-planning-analysis-and-evaluation-modified-language/642360/",{"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/biology-970052-paper-5-planning-analysis-and-evaluation-modified-language/642360.png","ImageObject",300,407,{"name":92,"@type":93},"Hazel","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-29","2026-10-23",true,{"@type":102,"interactionType":103,"userInteractionCount":14},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why are the results in Table 1.2 described as qualitative?","Question",{"text":112,"@type":113},"Because the observations report color states (e.g., green/blue) without measuring a numerical value for each result.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Why were tubes 2, 3 and 4 included in addition to tube 1?",{"text":117,"@type":113},"They act as controls to isolate the effects of distilled water, DCPIP/extraction medium without chloroplasts, and the role of light (foil kept or removed) when testing whether the light-dependent stage occurred.",{"name":119,"@type":110,"acceptedAnswer":120},"How does the student’s hypothesis change the investigation plan?",{"text":121,"@type":113},"The investigation is modified to test the claim that increasing light intensity increases the rate of the light-dependent stage, requiring identification of independent/dependent variables and a data-collection method using the apparatus.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},642360,1793052317,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":14,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":144,"read_time":41},137441390410,"https://ap-avatar.wpscdn.com/avatar/2000252f4ab5702993?_k=1776741390130283984","Cambridge International Examinations  \nCambridge International Advanced Subsidiary and Advanced Level  \nBIOLOGY 9700/52  \nPaper 5 Planning, Analysis and Evaluation May/June 2018  \n1 hour 15 minutes  \nCandidates answer on the Question Paper.  \nNo Additional Materials are required.  \nMODIFIED LANGUAGE  \nREAD THESE INSTRUCTIONS FIRST  \nWrite your Centre number, candidate number and name on all the work you hand in.  \nWrite in dark blue or black pen.  \nYou may use an HB pencil for any diagrams or graphs.  \nDo not use staples, paper clips, glue or correction fluid.  \nDO NOT WRITE IN ANY BARCODES.  \nAnswer all questions.  \nElectronic calculators may be used.  \nYou may lose marks if you do not show your working or if you do not use appropriate units.  \nAt the end of the examination, fasten all your work securely together.  \nThe number of marks is given in brackets [ ] at the end of each question or part question.  \nThis document consists of 11 printed pages and 1 blank page.  \nDC (JM) 168234 © UCLES 2018  \n[Turn over  \n2  \n1 During the light dependent stage of photosynthesis, the photoactivation of chlorophyll and the photolysis of water releases hydrogen ions and electrons. These are added to the carrier molecule, NADP, changing it from an oxidised state to a reduced state, as shown in Fig. 1.1.  \n2H+ + 2e − + oxidised NADP  reduced NADP  \nFig. 1.1  \nDCPIP is a blue dye. When DCPIP is reduced by hydrogen ions and electrons, it becomes colourless, as shown in Fig. 1.2.  \noxidised DCPIP (blue)  \nreduced DCPIP (colourless)  \nFig. 1.2  \nA student used DCPIP to determine if the reactions in the light dependent stage had occurred ina suspension of chloroplasts.  \n• The suspension of chloroplasts was prepared by grinding, filtering and centrifuging a sample of leaves with ice-cold extraction medium.  \n• Four tubes containing the mixtures and covered in foil, were set up as shown in Table 1.1.  \nTable 1.1  \n\n| tube | contents |\n| --- | --- |\n| 1 | chloroplast suspension and DCPIP |\n| 2 | chloroplast suspension and distilled water |\n| 3 | DCPIP and extraction medium |\n| 4 | chloroplast suspension and DCPIP |\n\n• The tubes were illuminated through a thin glass tank filled with water as shown in Fig. 1.3.  \nthin tank of water  \nfoil  \ntube 1 containing chloroplast suspension and DCPIP  \nfoil  \n~~ ~~ timer  \nFig. 1.3  \n© UCLES 2018 9700/52/M/J/18  \n3  \n• The foil was removed from tubes 1, 2 and 3. The foil was kept on tube 4.  \n• A timer was started immediately.  \n• After 10 minutes the colour in each tube was observed and recorded.  \nTable 1.2 shows the student’s results.  \nTable 1.2  \n\n| tube | contents | foil | colour after 10 minutes |\n| --- | --- | --- | --- |\n| 1 | chloroplast suspension and DCPIP | removed | green |\n| 2 | chloroplast suspension and distilled water | removed | green |\n| 3 | DCPIP and extraction medium | removed | blue |\n| 4 | chloroplast suspension and DCPIP | kept in place | blue |\n\n(a) State why the results in Table 1.2 are qualitative.  \n...................................................................................................................................................  \n.............................................................................................................................................. [ 1]  \n(b) Explain why tubes 2, 3 and 4 were included.  \n...................................................................................................................................................  \n...................................................................................................................................................  \n...................................................................................................................................................  \n...................................................................................................................................................  \n...................................................","cbCaibrl1A3vOCsa","https://ap.wps.com/l/cbCaibrl1A3vOCsa","pdf",2288147,12,"English","# Read these instructions first\n# Light-dependent stage and DCPIP color change\n## Qualitative results (a)\n## Why tubes 2, 3 and 4 were included (b)\n## Function of the thin tank of water (c)\n# Modified investigation and variables\n## Independent and dependent variables (d)(i)\n## Method to collect data (d)(ii)\n# Light intensity calculation\n## Using the formula for I (e)","[{\"question\":\"Why are the results in Table 1.2 described as qualitative?\",\"answer\":\"Because the observations report color states (e.g., green/blue) without measuring a numerical value for each result.\"},{\"question\":\"Why were tubes 2, 3 and 4 included in addition to tube 1?\",\"answer\":\"They act as controls to isolate the effects of distilled water, DCPIP/extraction medium without chloroplasts, and the role of light (foil kept or removed) when testing whether the light-dependent stage occurred.\"},{\"question\":\"How does the student’s hypothesis change the investigation plan?\",\"answer\":\"The investigation is modified to test the claim that increasing light intensity increases the rate of the light-dependent stage, requiring identification of independent/dependent variables and a data-collection method using the apparatus.\"}]","BIOLOGY 9700/52 - Paper 5 Planning, Analysis and Evaluation - Modified Language | PDF",1792721955]