{"id":204389,"date":"2025-03-21T19:00:20","date_gmt":"2025-03-21T19:00:20","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=204389"},"modified":"2025-03-21T19:00:22","modified_gmt":"2025-03-21T19:00:22","slug":"which-of-the-following-is-not-a-product-of-the-krebs-cycle","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/21\/which-of-the-following-is-not-a-product-of-the-krebs-cycle\/","title":{"rendered":"Which of the following is not a product of the Krebs cycle"},"content":{"rendered":"\n<p>Which of the following is not a product of 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<p>The correct answer is <strong>Oxygen (O\u2082)<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation (300 words):<\/h3>\n\n\n\n<p>The <strong>Krebs cycle<\/strong>, also known as the <strong>citric acid cycle (CAC) or tricarboxylic acid (TCA) cycle<\/strong>, is a key metabolic pathway that occurs in the <strong>mitochondrial matrix<\/strong> of eukaryotic cells. It is the second stage of aerobic respiration, following glycolysis and preceding the electron transport chain (ETC).<\/p>\n\n\n\n<p>The primary function of the Krebs cycle is to oxidize <strong>acetyl-CoA<\/strong> (derived from carbohydrates, fats, and proteins) to generate high-energy electron carriers <strong>NADH and FADH\u2082<\/strong>, which are later used in oxidative phosphorylation to produce ATP.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Main Products of the Krebs Cycle:<\/strong><\/h3>\n\n\n\n<p>Each turn of the cycle produces:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>3 NADH<\/strong> \u2013 Carries electrons to the electron transport chain.<\/li>\n\n\n\n<li><strong>1 FADH\u2082<\/strong> \u2013 Another electron carrier for the electron transport chain.<\/li>\n\n\n\n<li><strong>1 GTP (or ATP)<\/strong> \u2013 Directly usable energy.<\/li>\n\n\n\n<li><strong>2 CO\u2082<\/strong> \u2013 Released as a waste product from the decarboxylation reactions.<\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Why is Oxygen (O\u2082) Not a Product?<\/strong><\/h3>\n\n\n\n<p>Although oxygen is essential for cellular respiration, it is <strong>not produced<\/strong> in the Krebs cycle. Instead, it serves as the <strong>final electron acceptor<\/strong> in the electron transport chain, where it combines with electrons and protons to form <strong>water (H\u2082O)<\/strong>.<\/p>\n\n\n\n<p>The Krebs cycle itself does not produce oxygen; it only generates electron carriers (NADH and FADH\u2082), which then transfer electrons to the ETC, leading to ATP production in the presence of oxygen.<\/p>\n\n\n\n<p>Thus, among the given choices, <strong>oxygen (O\u2082) is not a product of the Krebs cycle<\/strong> but rather a <strong>requirement for the final stage of aerobic respiration<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following is not a product of the Krebs cycle? The correct answer and explanation is : The correct answer is Oxygen (O\u2082). Explanation (300 words): The Krebs cycle, also known as the citric acid cycle (CAC) or tricarboxylic acid (TCA) cycle, is a key metabolic pathway that occurs in the mitochondrial matrix [&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-204389","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204389","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=204389"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204389\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=204389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=204389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=204389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}