{"id":253017,"date":"2025-07-11T16:59:23","date_gmt":"2025-07-11T16:59:23","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=253017"},"modified":"2025-07-11T16:59:25","modified_gmt":"2025-07-11T16:59:25","slug":"a-nucleotide-of-dna-may-contain_______","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/11\/a-nucleotide-of-dna-may-contain_______\/","title":{"rendered":"A nucleotide of DNA may contain_______"},"content":{"rendered":"\n

A nucleotide of DNA may contain_______. a. ribose, uracil, and a phosphate group b. deoxyribose, uracil, and a phosphate group c. deoxyribose, thymine, and a phosphate group d. ribose, thymine, and a phosphate group<\/p>\n\n\n\n

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

The correct answer is c. deoxyribose, thymine, and a phosphate group.<\/strong><\/p>\n\n\n\n

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

A nucleotide is the basic building block of DNA (deoxyribonucleic acid). It is composed of three main components:<\/p>\n\n\n\n

    \n
  1. Deoxyribose<\/strong>: This is a 5-carbon sugar molecule that forms the backbone of the DNA strand. The “deoxy-” part of the name indicates that one oxygen atom is missing from the sugar compared to ribose (found in RNA). This absence of oxygen is a key difference between DNA and RNA.<\/li>\n\n\n\n
  2. Thymine<\/strong>: This is one of the four nitrogenous bases found in DNA. Thymine is a pyrimidine<\/strong> base, and it pairs with adenine<\/strong> in the DNA double helix through two hydrogen bonds.<\/li>\n\n\n\n
  3. Phosphate group<\/strong>: The phosphate group is attached to the sugar (deoxyribose) and is crucial for linking adjacent nucleotides together to form the DNA strand. The phosphate group forms a bond with the 3′ carbon of one sugar and the 5′ carbon of the next sugar, creating a sugar-phosphate backbone for the DNA molecule.<\/li>\n<\/ol>\n\n\n\n

    The other answer choices do not describe a nucleotide in DNA:<\/p>\n\n\n\n

      \n
    • a. Ribose, uracil, and a phosphate group<\/strong>: This describes RNA, not DNA. RNA contains ribose (a sugar with an extra hydroxyl group compared to deoxyribose) and uracil (a nitrogenous base that pairs with adenine in RNA).<\/li>\n\n\n\n
    • b. Deoxyribose, uracil, and a phosphate group<\/strong>: Uracil is found in RNA, not DNA. In DNA, uracil is replaced by thymine.<\/li>\n\n\n\n
    • d. Ribose, thymine, and a phosphate group<\/strong>: Ribose is a component of RNA, and thymine is found in DNA, but this combination is incorrect because ribose should not be present in DNA.<\/li>\n<\/ul>\n\n\n\n

      Thus, c. deoxyribose, thymine, and a phosphate group<\/strong> is the correct description of a nucleotide in DNA.<\/p>\n\n\n\n

      \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

      A nucleotide of DNA may contain_______. a. ribose, uracil, and a phosphate group b. deoxyribose, uracil, and a phosphate group c. deoxyribose, thymine, and a phosphate group d. ribose, thymine, and a phosphate group The Correct Answer and Explanation is: The correct answer is c. deoxyribose, thymine, and a phosphate group. Explanation: A nucleotide is […]<\/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-253017","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/253017","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=253017"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/253017\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=253017"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=253017"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=253017"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}