[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-661053-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-661053-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","dna-structure-diagram-b-form-double-helix-structural-overview","DNA Structure Diagram - B-form Double Helix Structural Overview","","B-form DNA structure diagram provides a three-panel, annotated overview of the predominant DNA conformation under physiological conditions. It maps the right-handed double helix geometry (antiparallel 5′→3′ and 3′→5′ backbones), major and minor groove dimensions, and helical parameters such as 10 base pairs per turn and 3.4 nm pitch. A second panel expands a nucleotide into phosphate, deoxyribose sugar, and nitrogenous base, while the base-pair panel links A–T and G–C hydrogen-bond counts to stability and melting temperature using the Wallace rule.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/healthcare/","Healthcare",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/dna-structure-diagram-b-form-double-helix-structural-overview/661053/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/dna-structure-diagram-b-form-double-helix-structural-overview/661053.png","ImageObject",300,407,{"name":42,"@type":43},"\tJames","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-29","2026-10-28",true,{"@type":52,"interactionType":53,"userInteractionCount":22},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What do Panel 1, Panel 2, and Panel 3 show in the B-form DNA diagram?","Question",{"text":62,"@type":63},"Panel 1 summarizes the overall right-handed double helix geometry and groove features. Panel 2 zooms into the nucleotide and base-pair details, including exploded components. Panel 3 consolidates key structural numerical parameters and facts for quick scanning.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How are major and minor grooves defined and what are their approximate widths?",{"text":67,"@type":63},"The major groove is the wider gap between backbone ribbons and is indicated as ~2.2 nm wide. The minor groove is the narrower gap between the ribbons and is indicated as ~1.2 nm wide.",{"name":69,"@type":60,"acceptedAnswer":70},"How does the diagram explain DNA stability using base-pair hydrogen bonding and melting temperature?",{"text":71,"@type":63},"A–T pairs have 2 hydrogen bonds while G–C pairs have 3, so G–C-rich regions are stronger. Using the Wallace rule shown, higher G+C content increases the melting temperature (Tm) because additional hydrogen bonds must be broken during strand separation.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},661053,1793156749,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,105,109,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":92,"show_sort_weight":93,"slug":94},"Exam",70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":107,"slug":108},7,40,"healthcare",{"id":110,"doc_module":4,"doc_module_name":25,"category_name":111,"show_sort_weight":112,"slug":113},8,"Research & Report",30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":106,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":22,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":33,"language":139,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":12,"update_tm":79,"read_time":123},2336474466412,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","DNA Structure Diagram — B-form Double Helix Structural Overview  \nFigure  \nDNA Structure Diagram  \nFigure 1. Annotated infographic of the B-form DNA double helix, showing the overall helical geometry (Panel 1) , a zoomed nucleotide and base-pair detail (Panel 2) , and key structural facts (Panel 3) . Flat 2D vector style; print-ready for medical-textbook or lecture use.  \n1. What Was Drawn  \nThe illustration presents B-form DNA —the predominant conformation of DNA under physiological conditions —across three coordinated panels:  \n\n| Panel | Content |\n| --- | --- |\n| Panel 1 – Double Helix Overview | Full right-handed double helix with antiparallel backbones, major groove, minor groove, helical turn annotation, and base-pair spacing |\n| Panel 2 – Nucleotide & Base-Pair Detail | Exploded nucleotide showing phosphate group, deoxyribose sugar (C1 ′–C5 ′) , and nitrogenous base; A-T and G-C base pairs with hydrogen-bond counts |\n| Panel 3 – Key Structural Facts | Five data cards summarising helix type, diameter, base-pairing rules, backbone chemistry, and genetic function |\n\n2. Labels and Components 2.1 Double Helix (Panel 1)  \n\n| Label | Description | Colour code |\n| --- | --- | --- |\n| 5 ′→3 ′ strand | One backbone ribbon running top to bottom | Teal \\#4ECDC4 |\n| 3 ′→5 ′ strand | Complementary antiparallel backbone | Coral \\#FF6B6B |\n| A-T base pairs | Horizontal rungs between the strands | Light blue |\n| G-C base pairs | Horizontal rungs between the strands | Soft gold |\n| Major Groove | Wider gap between backbone ribbons; ~2.2 nm wide | Bracket label, dark navy |\n| Minor Groove | Narrower gap; ~ 1.2 nm wide | Bracket label, dark navy |\n| One full helical turn | Vertical span of 10 base pairs | Double-headed arrow: 3.4 nm |\n| Base-pair rise | Distance between adjacent base pairs | Bracket: 0.34 nm |\n\n2.2 Nucleotide Components (Panel 2 — upper)  \n\n| Component | Shape | Colour | Key detail |\n| --- | --- | --- | --- |\n| Deoxyribose Sugar | Pentagon | Soft yellow \\#FFE66D | C1 ′ (base attachment) , C3 ′ (OH) , C5 ′(phosphate linkage) |\n| Phosphate Group | Circle/oval | Lavender\u003Cbr>\\#A29BFE | PO₄³ ⁻ ; linked to C5 ′ of one sugar and C3 ′ of the next |\n| Nitrogenous Base | Rectangle | Mint \\#55EFC4 | Attached at C1 ′; identity determines genetic information |\n| Phosphodiester Bond | Curved arrow between nucleotides | — | Covalent linkage through phosphate between 3 ′ and 5 ′ carbons |\n\n2.3 Base Pairs (Panel 2 — lower)  \n\n| Pair | Purine | Pyrimidine | Hydrogen Bonds | Bond type |\n| --- | --- | --- | --- | --- |\n| A – T | Adenine (blue \\#0984E3) | Thymine (sky blue \\#74B9FF) | 2 | Weak; A-T-rich regions more easily denatured |\n| G – C | Guanine (deep green \\#00B894) | Cytosine (light green \\#55EFC4) | 3 | Stronger; G-C-rich regions raise melting temperature |\n\nChargaff's Rule: In any double-stranded DNA, [A] = [T] and [G] = [C] .  \n3. Structural Data and Equations B-form DNA — Key Parameters  \n\n| Parameter | Value |\n| --- | --- |\n| Helix handedness | Right-handed |\n| Helix diameter | ~2.0 nm |\n| Rise per base pair | 0.34 nm |\n| Base pairs per helical turn | ~ 10 |\n| Pitch (one full turn) | 3.4 nm |\n| Major groove width | ~2.2 nm |\n| Minor groove width | ~ 1.2 nm |\n| Glycosidic bond | Anti conformation |\n\nSugar–Phosphate Backbone Linkage  \nThe backbone is formed by a repeated phosphodiester bond:  \n—O—P(=O ) (O ⁻)—O—CH ₂—[Sugar C5 ′→C3 ′]—O—P(=O ) (O ⁻)—O—CH ₂—. . .  \nEach phosphate bears a negative charge at physiological pH, making DNA a polyanion. The two strands run antiparallel (5 ′→3 ′ on one strand; 3 ′→5 ′ on the complementary strand) .  \nTm Estimation (Wallace Rule, short oligonucleotides)  \n$$T_m \\approx 2°C \\times (A + T) + 4°C \\times (G + C)$$  \nBecause G-C pairs have three hydrogen bonds versus two for A-T pairs, G-C content raises the melting temperature (T_m) of a duplex.  \n4. Colour Palette (Illustration Key)  \n\n| Element | Hex code |\n| --- | --- |\n| 5 ′→3 ′ backbone | \\#4ECDC4 (teal) |\n| 3 ′→5 ′ backbone | \\#FF6B6B (cora","cbCaijQY8irGLnHY","https://ap.wps.com/l/cbCaijQY8irGLnHY","pdf",185343,"English","# What Was Drawn\n# Labels and Components\n## Double Helix (Panel 1)\n## Nucleotide Components (Panel 2 — upper)\n## Base Pairs (Panel 2 — lower)\n# Structural Data and Equations\n# Colour Palette (Illustration Key)\n# Reading the Figure\n# Scientific References","[{\"question\":\"What do Panel 1, Panel 2, and Panel 3 show in the B-form DNA diagram?\",\"answer\":\"Panel 1 summarizes the overall right-handed double helix geometry and groove features. Panel 2 zooms into the nucleotide and base-pair details, including exploded components. Panel 3 consolidates key structural numerical parameters and facts for quick scanning.\"},{\"question\":\"How are major and minor grooves defined and what are their approximate widths?\",\"answer\":\"The major groove is the wider gap between backbone ribbons and is indicated as ~2.2 nm wide. The minor groove is the narrower gap between the ribbons and is indicated as ~1.2 nm wide.\"},{\"question\":\"How does the diagram explain DNA stability using base-pair hydrogen bonding and melting temperature?\",\"answer\":\"A–T pairs have 2 hydrogen bonds while G–C pairs have 3, so G–C-rich regions are stronger. Using the Wallace rule shown, higher G+C content increases the melting temperature (Tm) because additional hydrogen bonds must be broken during strand separation.\"}]","DNA Structure Diagram - B-form Double Helix Structural Overview | PDF"]