{"id":22721,"date":"2025-06-16T21:33:39","date_gmt":"2025-06-16T21:33:39","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=22721"},"modified":"2025-06-16T21:33:40","modified_gmt":"2025-06-16T21:33:40","slug":"this-means-that-18-of-the-bases-in-this-dna-molecule-are-guanine","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/this-means-that-18-of-the-bases-in-this-dna-molecule-are-guanine\/","title":{"rendered":"This means that 18% of the bases in this DNA molecule are guanine"},"content":{"rendered":"\n<p>This means that 18% of the bases in this DNA molecule are guanine. True False<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Answer:<\/strong> True<\/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>In double-stranded DNA, the base pairing rules, known as <strong>Chargaff&#8217;s rules<\/strong>, state that:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The amount of <strong>adenine (A)<\/strong> equals the amount of <strong>thymine (T)<\/strong>.<\/li>\n\n\n\n<li>The amount of <strong>guanine (G)<\/strong> equals the amount of <strong>cytosine (C)<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>This is because A pairs specifically with T, and G pairs specifically with C through hydrogen bonds.<\/p>\n\n\n\n<p>If the statement says <strong>18% of the bases are guanine<\/strong>, then by Chargaff\u2019s rules, <strong>18% must also be cytosine<\/strong>. Together, guanine and cytosine make up:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>18%+18%=36%18\\% + 18\\% = 36\\% of the total bases.<\/li>\n<\/ul>\n\n\n\n<p>Since all the bases must add up to 100%, the remaining bases are adenine and thymine, which together account for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>100%\u221236%=64%100\\% &#8211; 36\\% = 64\\%.<\/li>\n<\/ul>\n\n\n\n<p>Because A = T, adenine and thymine individually make up:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>64%2=32%\\frac{64\\%}{2} = 32\\% each.<\/li>\n<\/ul>\n\n\n\n<p>So the base composition of the DNA would be approximately:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Adenine (A): 32%<\/li>\n\n\n\n<li>Thymine (T): 32%<\/li>\n\n\n\n<li>Guanine (G): 18%<\/li>\n\n\n\n<li>Cytosine (C): 18%<\/li>\n<\/ul>\n\n\n\n<p>This matches the fundamental pairing principle of DNA and validates that if 18% of the bases are guanine, the statement is true.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Additional context:<\/h3>\n\n\n\n<p>The <strong>complementary base pairing<\/strong> ensures DNA&#8217;s double helix structure is stable and allows accurate replication during cell division. This precise pairing means that knowing the percentage of one base automatically lets you know the percentage of its complementary base.<\/p>\n\n\n\n<p>For example, if you know guanine is 18%, cytosine is also 18%. The rest of the bases are adenine and thymine in equal amounts. This is a fundamental concept used in molecular biology, genetics, and biochemistry to understand DNA composition and function.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This means that 18% of the bases in this DNA molecule are guanine. True False The correct answer and explanation is: Answer: True Explanation: In double-stranded DNA, the base pairing rules, known as Chargaff&#8217;s rules, state that: This is because A pairs specifically with T, and G pairs specifically with C through hydrogen bonds. If [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-22721","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/22721","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=22721"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/22721\/revisions"}],"predecessor-version":[{"id":22722,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/22721\/revisions\/22722"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=22721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=22721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=22721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}