Which molecule is recycled between the Calvin cycle and the light-dependent reactions during photosynthesis? A. water B. carbon dioxide C. oxygen D. ADP<\/p>\n\n\n\n
The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n The correct answer is D. ADP<\/strong>.<\/p>\n\n\n\n In photosynthesis, two main stages occur: the light-dependent reactions and the Calvin cycle. These stages work together to convert light energy into chemical energy stored in glucose. The recycling of molecules between these stages is crucial for the efficient operation of photosynthesis.<\/p>\n\n\n\n The light-dependent reactions take place in the thylakoid membranes of the chloroplasts. These reactions use sunlight to produce two key energy-rich molecules: ATP<\/strong> (adenosine triphosphate) and NADPH<\/strong> (nicotinamide adenine dinucleotide phosphate). Water molecules are split to release oxygen, protons, and electrons in a process called photolysis, and this oxygen is released as a by-product. The energy from light is used to convert ADP (adenosine diphosphate) into ATP and to reduce NADP+ to NADPH.<\/p>\n\n\n\n The Calvin cycle, also known as the light-independent reactions or the dark reactions, takes place in the stroma of the chloroplast. This cycle uses the energy stored in ATP and NADPH (produced during the light-dependent reactions) to convert carbon dioxide<\/strong> into glucose and other sugars. In each turn of the Calvin cycle, ATP<\/strong> is consumed to provide the energy for carbon fixation and other reactions, and NADPH<\/strong> is used as a reducing agent to form carbohydrates.<\/p>\n\n\n\n During the Calvin cycle, ATP is used to power the conversion of carbon dioxide into organic molecules. After ATP is used, it is converted back into ADP<\/strong> (adenosine diphosphate) and inorganic phosphate. This ADP is then recycled back into the light-dependent reactions, where it can be re-phosphorylated (converted back to ATP) by the energy from sunlight.<\/p>\n\n\n\n Thus, ADP<\/strong> is the molecule that is recycled between the Calvin cycle and the light-dependent reactions, ensuring that the cell continues to have a constant supply of energy (ATP) for photosynthesis.<\/p>\n","protected":false},"excerpt":{"rendered":" Which molecule is recycled between the Calvin cycle and the light-dependent reactions during photosynthesis? A. water B. carbon dioxide C. oxygen D. ADP The Correct Answer and Explanation is : The correct answer is D. ADP. In photosynthesis, two main stages occur: the light-dependent reactions and the Calvin cycle. These stages work together to convert […]<\/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-163082","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/163082","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=163082"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/163082\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=163082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=163082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=163082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Light-Dependent Reactions<\/h3>\n\n\n\n
Calvin Cycle<\/h3>\n\n\n\n
Recycling of ADP<\/h3>\n\n\n\n