{"id":220613,"date":"2025-05-28T13:55:24","date_gmt":"2025-05-28T13:55:24","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=220613"},"modified":"2025-05-28T13:55:26","modified_gmt":"2025-05-28T13:55:26","slug":"dna-base-pairing","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/28\/dna-base-pairing\/","title":{"rendered":"DNA Base Pairing"},"content":{"rendered":"\n<p>DNA Base Pairing<\/p>\n\n\n\n<p>There are base pairing rules for writing complimentary DNA strands for a given strand. Write the complimentary DNA strand for each given strand of DNA.C G T A G C G C T A A T T A<\/p>\n\n\n\n<p>T C T T A A A T G A T C G A T C<\/p>\n\n\n\n<p>A A T G A A T A G C T A G C T T<\/p>\n\n\n\n<ol class=\"wp-block-list\"><\/ol>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Complimentary DNA Strands<\/h3>\n\n\n\n<p>To determine the complementary DNA strand, we follow <strong>base pairing rules<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A (Adenine)<\/strong> pairs with <strong>T (Thymine)<\/strong><\/li>\n\n\n\n<li><strong>T (Thymine)<\/strong> pairs with <strong>A (Adenine)<\/strong><\/li>\n\n\n\n<li><strong>C (Cytosine)<\/strong> pairs with <strong>G (Guanine)<\/strong><\/li>\n\n\n\n<li><strong>G (Guanine)<\/strong> pairs with <strong>C (Cytosine)<\/strong><\/li>\n<\/ul>\n\n\n\n<p>Now, let&#8217;s find the complementary strands:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>1. Original Strand:<\/strong><br>C G T A G C G C T A A T T A<br><strong>Complementary Strand:<\/strong><br>G C A T C G C G A T T A A T<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>2. Original Strand:<\/strong><br>T C T T A A A T G A T C G A T C<br><strong>Complementary Strand:<\/strong><br>A G A A T T T A C T A G C T A G<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>3. Original Strand:<\/strong><br>A A T G A A T A G C T A G C T T<br><strong>Complementary Strand:<\/strong><br>T T A C T T A T C G A T C G A A<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<p>DNA, or deoxyribonucleic acid, stores genetic information in the form of a double helix. Each strand is composed of nucleotides, each containing a sugar, a phosphate group, and one of four nitrogenous bases: <strong>Adenine (A), Thymine (T), Cytosine (C),<\/strong> and <strong>Guanine (G)<\/strong>.<\/p>\n\n\n\n<p>The structure of DNA relies on specific <strong>base pairing rules<\/strong>, first proposed by Erwin Chargaff and later confirmed by James Watson and Francis Crick. These rules ensure that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Adenine (A)<\/strong> always pairs with <strong>Thymine (T)<\/strong> through <strong>two hydrogen bonds<\/strong>, and<\/li>\n\n\n\n<li><strong>Cytosine (C)<\/strong> always pairs with <strong>Guanine (G)<\/strong> through <strong>three hydrogen bonds<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>This complementarity is crucial during DNA replication. When a DNA molecule is copied, the two strands separate, and new complementary nucleotides are added to each original strand, forming two identical DNA molecules.<\/p>\n\n\n\n<p>In this exercise, each original strand is a single sequence of DNA bases. The task was to determine the complementary strand by applying the base pairing rules one base at a time. For example, if the original base is <strong>C<\/strong>, the complementary base is <strong>G<\/strong>. If it&#8217;s <strong>T<\/strong>, it pairs with <strong>A<\/strong>, and so on.<\/p>\n\n\n\n<p>This principle of base pairing is fundamental not only to DNA replication but also to processes like <strong>transcription<\/strong> (copying DNA to RNA) and various biotechnology applications such as <strong>PCR<\/strong> and <strong>DNA sequencing<\/strong>.<\/p>\n\n\n\n<p>By understanding how complementary strands are formed, we gain insight into the stability and accuracy of genetic information transfer across generations.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/05\/learnexams-banner7-66.jpeg\" alt=\"\" class=\"wp-image-220614\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>DNA Base Pairing There are base pairing rules for writing complimentary DNA strands for a given strand. Write the complimentary DNA strand for each given strand of DNA.C G T A G C G C T A A T T A T C T T A A A T G A T C G A [&hellip;]<\/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-220613","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/220613","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=220613"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/220613\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=220613"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=220613"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=220613"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}