{"id":162381,"date":"2024-11-06T17:40:49","date_gmt":"2024-11-06T17:40:49","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=162381"},"modified":"2024-11-06T17:40:51","modified_gmt":"2024-11-06T17:40:51","slug":"which-of-the-following-occurs-during-the-calvin-cycle","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/11\/06\/which-of-the-following-occurs-during-the-calvin-cycle\/","title":{"rendered":"Which of the following occurs during the Calvin cycle"},"content":{"rendered":"\n<p>Which of the following occurs during the Calvin cycle?<br>A. release of oxygen<br>B. reduction of NADP+<br>C. generation of CO\u2082<br>D. carbon fixation<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct answer is <strong>D. carbon fixation<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The <strong>Calvin cycle<\/strong> is a key part of <strong>photosynthesis<\/strong> that occurs in the <strong>stroma of the chloroplast<\/strong> in plant cells. It involves a series of chemical reactions that convert carbon dioxide and other compounds into glucose, a form of sugar that plants use for energy and growth. The Calvin cycle does not require light, so it is considered part of the <strong>light-independent reactions<\/strong> (or <strong>dark reactions<\/strong>) of photosynthesis.<\/p>\n\n\n\n<p>During the Calvin cycle, the first major process that occurs is <strong>carbon fixation<\/strong>, which is answer <strong>D<\/strong>. This is where <strong>carbon dioxide (CO\u2082)<\/strong> from the atmosphere is &#8220;fixed&#8221; into an organic molecule. This step is carried out by an enzyme called <strong>RuBisCO<\/strong> (ribulose bisphosphate carboxylase\/oxygenase), which catalyzes the attachment of CO\u2082 to a 5-carbon molecule called <strong>ribulose bisphosphate (RuBP)<\/strong>. This results in the formation of a 6-carbon molecule that quickly breaks down into two molecules of <strong>3-phosphoglycerate (3-PGA)<\/strong>, a 3-carbon compound.<\/p>\n\n\n\n<p>Once the carbon is fixed, the Calvin cycle proceeds through additional steps that involve the reduction of <strong>NADPH<\/strong> (produced in the light reactions of photosynthesis) to convert 3-PGA into <strong>glyceraldehyde-3-phosphate (G3P)<\/strong>. G3P can later be used to synthesize glucose and other carbohydrates.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Incorrect Options:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A. Release of oxygen<\/strong>: This occurs during the <strong>light-dependent reactions<\/strong>, not the Calvin cycle. Oxygen is produced as a byproduct of splitting water molecules (photolysis) in the light reactions.<\/li>\n\n\n\n<li><strong>B. Reduction of NADP+<\/strong>: This occurs in the <strong>light reactions<\/strong>, where NADP+ is reduced to form NADPH.<\/li>\n\n\n\n<li><strong>C. Generation of CO\u2082<\/strong>: CO\u2082 is not generated during the Calvin cycle. Instead, it is consumed as a reactant in the carbon fixation step.<\/li>\n<\/ul>\n\n\n\n<p>Thus, the Calvin cycle is primarily responsible for fixing carbon dioxide into organic molecules, which is essential for the synthesis of sugars in plants.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following occurs during the Calvin cycle?A. release of oxygenB. reduction of NADP+C. generation of CO\u2082D. carbon fixation The Correct Answer and Explanation is: The correct answer is D. carbon fixation. Explanation: The Calvin cycle is a key part of photosynthesis that occurs in the stroma of the chloroplast in plant cells. It [&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-162381","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/162381","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=162381"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/162381\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=162381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=162381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=162381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}