{"id":204368,"date":"2025-03-21T18:51:21","date_gmt":"2025-03-21T18:51:21","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=204368"},"modified":"2025-03-21T18:51:23","modified_gmt":"2025-03-21T18:51:23","slug":"for-each-molecule-of-glucose-entering-respiration","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/21\/for-each-molecule-of-glucose-entering-respiration\/","title":{"rendered":"For each molecule of glucose entering respiration"},"content":{"rendered":"\n<p>For each molecule of glucose entering respiration:<br>a) How many ATP are produced during the Krebs cycle?<br>b) How many NADH are produced during the Krebs cycle?<br>c) How many FADH, are produced during the Krebs cycle?<br>d) How many molecules of carbon dioxide are produced during the Krebs cycle??<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answers:<\/h3>\n\n\n\n<p>a) <strong>2 ATP<\/strong> are produced during the Krebs cycle.<br>b) <strong>6 NADH<\/strong> are produced during the Krebs cycle.<br>c) <strong>2 FADH\u2082<\/strong> are produced during the Krebs cycle.<br>d) <strong>4 CO\u2082<\/strong> molecules are produced during the Krebs cycle.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Cellular respiration is a multi-step process that converts glucose into energy. The Krebs cycle (also called the citric acid cycle or TCA cycle) is a crucial part of aerobic respiration, occurring in the <strong>mitochondrial matrix<\/strong>. This cycle processes <strong>acetyl-CoA<\/strong>, which is derived from <strong>pyruvate<\/strong>, the product of glycolysis.<\/p>\n\n\n\n<p>For each molecule of glucose (C\u2086H\u2081\u2082O\u2086), <strong>two molecules of pyruvate<\/strong> are produced, and each pyruvate is converted into <strong>one acetyl-CoA<\/strong>. Since the Krebs cycle operates <strong>once per acetyl-CoA<\/strong>, it occurs <strong>twice per glucose molecule<\/strong>.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>ATP Production<\/strong>: During one turn of the cycle, <strong>one ATP (or GTP)<\/strong> is produced through substrate-level phosphorylation. Since the cycle turns <strong>twice per glucose<\/strong>, this results in <strong>2 ATP per glucose<\/strong>.<\/li>\n\n\n\n<li><strong>NADH Production<\/strong>: Each turn of the cycle generates <strong>three NADH<\/strong> molecules through redox reactions. Since the cycle happens twice per glucose, this results in <strong>6 NADH per glucose<\/strong>. These NADH molecules are crucial for ATP production in the electron transport chain.<\/li>\n\n\n\n<li><strong>FADH\u2082 Production<\/strong>: Each turn of the cycle produces <strong>one FADH\u2082<\/strong>, leading to <strong>2 FADH\u2082 per glucose<\/strong>. FADH\u2082 also donates electrons to the electron transport chain but at a lower energy level than NADH.<\/li>\n\n\n\n<li><strong>CO\u2082 Production<\/strong>: Two carbon atoms from acetyl-CoA are fully oxidized and released as <strong>two CO\u2082 molecules per cycle turn<\/strong>. Since the cycle occurs twice per glucose, a total of <strong>4 CO\u2082 molecules are released<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>Thus, the Krebs cycle plays a fundamental role in energy extraction, producing high-energy electron carriers (NADH, FADH\u2082) and ATP while fully oxidizing glucose-derived carbon into CO\u2082.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For each molecule of glucose entering respiration:a) How many ATP are produced during the Krebs cycle?b) How many NADH are produced during the Krebs cycle?c) How many FADH, are produced during the Krebs cycle?d) How many molecules of carbon dioxide are produced during the Krebs cycle?? The correct answer and explanation is : Answers: 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-204368","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204368","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=204368"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204368\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=204368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=204368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=204368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}