{"id":168894,"date":"2024-11-18T17:07:14","date_gmt":"2024-11-18T17:07:14","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=168894"},"modified":"2024-11-18T17:07:16","modified_gmt":"2024-11-18T17:07:16","slug":"the-oxygens","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/11\/18\/the-oxygens\/","title":{"rendered":"The oxygens"},"content":{"rendered":"\n

The oxygens
on the sugar that makes up DNA
are counted in which direction?
counter clockwise
clockwise<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer: Clockwise<\/strong><\/h3>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

The oxygen atoms in the sugar of DNA, specifically deoxyribose, are numbered in a clockwise direction<\/strong> starting from the oxygen atom in the ring structure. Deoxyribose is a five-carbon sugar, and its structure is central to the DNA backbone.<\/p>\n\n\n\n

Understanding Carbon Numbering in Deoxyribose<\/h4>\n\n\n\n
    \n
  1. Five-membered Ring Structure<\/strong>: Deoxyribose forms a cyclic (ring) structure with one oxygen atom and four carbon atoms.<\/li>\n\n\n\n
  2. Clockwise Numbering<\/strong>: The numbering of carbons in deoxyribose begins with the oxygen atom in the ring as the reference point:<\/li>\n<\/ol>\n\n\n\n
      \n
    • Carbon 1′ (1-prime): The first carbon adjacent to the oxygen atom in the ring is numbered as 1′.<\/li>\n\n\n\n
    • Carbon 2′: Moving clockwise, the next carbon is numbered as 2′. This carbon is significant in DNA because it lacks a hydroxyl group (-OH), distinguishing deoxyribose from ribose in RNA.<\/li>\n\n\n\n
    • Carbon 3′: Continuing clockwise, the next carbon is numbered as 3′. This carbon is critical for forming phosphodiester bonds between nucleotides.<\/li>\n\n\n\n
    • Carbon 4′: The fourth carbon in the ring is labeled as 4′.<\/li>\n\n\n\n
    • Carbon 5′: The fifth carbon is not part of the ring; it is attached to the 4′ carbon as part of the sugar’s structure. It is important for attaching the phosphate group.<\/li>\n<\/ul>\n\n\n\n

      Significance of Clockwise Numbering<\/h4>\n\n\n\n

      The standardized clockwise numbering system ensures consistency in describing DNA’s structure and function. For example:<\/p>\n\n\n\n

        \n
      • The 3′ carbon<\/strong> is where new nucleotides are added during DNA synthesis.<\/li>\n\n\n\n
      • The 5′ carbon<\/strong> is where the phosphate group attaches, creating the 5′-end of the DNA strand.<\/li>\n<\/ul>\n\n\n\n

        Thus, the clockwise numbering of oxygen and carbons in deoxyribose provides a universal framework for understanding DNA’s chemical structure and its biological processes.<\/p>\n","protected":false},"excerpt":{"rendered":"

        The oxygenson the sugar that makes up DNAare counted in which direction?counter clockwiseclockwise The Correct Answer and Explanation is: Correct Answer: Clockwise Explanation: The oxygen atoms in the sugar of DNA, specifically deoxyribose, are numbered in a clockwise direction starting from the oxygen atom in the ring structure. Deoxyribose is a five-carbon sugar, and its […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-168894","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168894","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=168894"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168894\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=168894"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=168894"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=168894"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}