In DNA: OC is a purine OC pairs with T OT is a purine A pairs with T OA is a purine OG pairs with A OG pairs with C G is a purine <\/p>\n\n\n\n
Check all of the following that are components of a SINGLE nucleotide A repeating sugar phosphate backbone A deoxyribose sugar <\/p>\n\n\n\n
A. A double helix A3′ OH <\/p>\n\n\n\n
B. A nitrogenous base A ribose sugar A5′ phosphate group <\/p>\n\n\n\n
C. Complimentary base-pairing <\/p>\n\n\n\n
Check all of the following that apply to the secondary structure of DNA: <\/p>\n\n\n\n
A. Complimentary base pair holds strands together <\/p>\n\n\n\n
B. Parallel polynucleotide strands <\/p>\n\n\n\n
C. Nitrogenous bases make up the backbone or sides of the ladder <\/p>\n\n\n\n
D. Nitrogenous bases make up the rungs of the ladder <\/p>\n\n\n\n
E. Antiparallel polynucleotide strands <\/p>\n\n\n\n
A pairs with G A repeating ribose deoxyribose backbone <\/p>\n\n\n\n
A repeating sugar phosphate backbone<\/p>\n\n\n\n
The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n Let’s address each part of your question by separating the components:<\/p>\n\n\n\n \u2705 A pairs with T<\/strong> \u2705 A deoxyribose sugar<\/strong> \u2705 Complimentary base pair holds strands together<\/strong> DNA (deoxyribonucleic acid) is a double-stranded molecule composed of nucleotides, each made of three key parts: a deoxyribose sugar, a phosphate group, and a nitrogenous base. These bases are adenine (A), thymine (T), cytosine (C), and guanine (G). The bases are categorized into two types: purines<\/strong> (A and G) and pyrimidines<\/strong> (T and C). Purines are larger, double-ring structures, whereas pyrimidines are smaller, single-ring structures. In DNA, A pairs with T<\/strong> via two hydrogen bonds, and G pairs with C<\/strong> via three hydrogen bonds. These specific pairings ensure the stability of the DNA double helix.<\/p>\n\n\n\n A single nucleotide<\/strong> contains one base (A, T, C, or G), a deoxyribose sugar, a 5′ phosphate group, and a 3′ hydroxyl (OH) group. These nucleotides link together via phosphodiester bonds<\/strong> to form a sugar-phosphate backbone<\/strong>, which is the structural framework of DNA strands. However, this repeating backbone characterizes the entire DNA strand<\/strong>, not individual nucleotides.<\/p>\n\n\n\n The secondary structure of DNA<\/strong> refers to its famous double-helix<\/strong> shape. Two strands of DNA run in antiparallel<\/strong> directions (one 5′ to 3′, the other 3′ to 5′), and are held together by complementary base pairing<\/strong>: A with T, and G with C. The sugar-phosphate backbone forms the sides<\/strong> of the ladder, while the nitrogenous bases form the rungs<\/strong>. This structure allows DNA to be tightly packed and efficiently replicated.<\/p>\n\n\n\n Understanding the distinctions between nucleotide structure and DNA’s overall structure is essential for grasping how genetic information is stored, replicated, and transcribed.<\/p>\n","protected":false},"excerpt":{"rendered":" In DNA: OC is a purine OC pairs with T OT is a purine A pairs with T OA is a purine OG pairs with A OG pairs with C G is a purine Check all of the following that are components of a SINGLE nucleotide A repeating sugar phosphate backbone A deoxyribose sugar A. […]<\/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-214896","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/214896","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=214896"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/214896\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=214896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=214896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=214896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n\n\n\nPart 1: DNA Statements \u2013 Identify the correct ones<\/strong><\/h3>\n\n\n\n
\u2705 A is a purine<\/strong>
\u2705 G is a purine<\/strong>
\u274c OC is a purine<\/strong> \u2192 No such base “OC”
\u274c OC pairs with T<\/strong> \u2192 Invalid pairing
\u274c OT is a purine<\/strong> \u2192 No such base “OT”
\u274c OG pairs with A<\/strong> \u2192 G (guanine) pairs with C, not A
\u2705 OG pairs with C<\/strong> \u2192 G pairs with C correctly<\/p>\n\n\n\n
\n\n\n\nPart 2: Components of a Single Nucleotide \u2013 Check all that apply<\/strong><\/h3>\n\n\n\n
\u2705 A 3′ OH<\/strong>
\u2705 A nitrogenous base<\/strong>
\u2705 A 5′ phosphate group<\/strong>
\u274c A ribose sugar<\/strong> \u2192 Found in RNA, not DNA
\u274c A repeating sugar phosphate backbone<\/strong> \u2192 This is a feature of the DNA strand<\/strong>, not a single nucleotide
\u274c A double helix<\/strong> \u2192 Refers to the entire DNA structure
\u274c Complimentary base-pairing<\/strong> \u2192 Refers to DNA strands<\/strong>, not individual nucleotides<\/p>\n\n\n\n
\n\n\n\nPart 3: Features of DNA\u2019s Secondary Structure \u2013 Check all that apply<\/strong><\/h3>\n\n\n\n
\u274c Parallel polynucleotide strands<\/strong> \u2192 DNA strands are antiparallel<\/strong>, not parallel
\u274c Nitrogenous bases make up the backbone or sides of the ladder<\/strong> \u2192 Bases form the rungs<\/strong>, not the sides
\u2705 Nitrogenous bases make up the rungs of the ladder<\/strong>
\u2705 Antiparallel polynucleotide strands<\/strong>
\u274c A pairs with G<\/strong> \u2192 Incorrect, A pairs with T
\u274c A repeating ribose deoxyribose backbone<\/strong> \u2192 Incorrect phrasing
\u2705 A repeating sugar phosphate backbone<\/strong><\/p>\n\n\n\n
\n\n\n\n300-Word Explanation<\/strong><\/h3>\n\n\n\n