Select all that apply<\/p>\n\n\n\n
Select all of the following that occur in C4 ?plants.<\/p>\n\n\n\n
ATP is produced.<\/p>\n\n\n\n
Carbon is fixed twice.<\/p>\n\n\n\n
The Calvin cycle does not take place.<\/p>\n\n\n\n
Photorespiration is minimized.<\/p>\n\n\n\n
CO2 ?is first fixed to form a four-carbon molecule.<\/p>\n\n\n\n
CO2 ?is first fixed in mesophyll cells using rubisco to form a six-carbon molecule.<\/p>\n\n\n\n
The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n C4 plants, such as maize and sugarcane, have a specialized mechanism to increase photosynthetic efficiency under high light, temperature, and low CO\u2082 conditions. This mechanism involves distinct steps that differentiate them from C3 plants. Below are detailed explanations for each correct answer:<\/p>\n\n\n\n Select all that apply Select all of the following that occur in C4 ?plants. ATP is produced. Carbon is fixed twice. The Calvin cycle does not take place. Photorespiration is minimized. CO2 ?is first fixed to form a four-carbon molecule. CO2 ?is first fixed in mesophyll cells using rubisco to form a six-carbon molecule. The […]<\/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-182707","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/182707","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=182707"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/182707\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=182707"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=182707"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=182707"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Correct Answers:<\/h3>\n\n\n\n
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\n\n\n\nExplanation:<\/h3>\n\n\n\n
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ATP is essential for the energy-demanding processes in photosynthesis, including carbon fixation in the Calvin cycle and the regeneration of key molecules. In C4 plants, additional ATP is required for the transport of carbon compounds between the mesophyll and bundle-sheath cells.<\/li>\n\n\n\n
In C4 plants, carbon is fixed twice in separate processes. First, in mesophyll cells, CO\u2082 is captured and fixed to phosphoenolpyruvate (PEP) by the enzyme PEP carboxylase, forming a four-carbon compound (usually oxaloacetate or malate). This compound is then transported to bundle-sheath cells, where it releases CO\u2082 for fixation by Rubisco in the Calvin cycle. This two-step fixation ensures efficient carbon capture and minimizes photorespiration.<\/li>\n\n\n\n
C4 plants concentrate CO\u2082 around Rubisco in bundle-sheath cells, significantly reducing the oxygenase activity of Rubisco that leads to photorespiration. By segregating the initial CO\u2082 fixation and the Calvin cycle in different cells, C4 plants enhance photosynthetic efficiency under stress conditions.<\/li>\n\n\n\n
The hallmark of C4 photosynthesis is the initial fixation of CO\u2082 into a four-carbon molecule. This process occurs in mesophyll cells, where PEP carboxylase fixes CO\u2082 to form oxaloacetate. This mechanism gives C4 plants their name and distinguishes them from C3 plants.<\/li>\n<\/ol>\n\n\n\n
\n\n\n\nIncorrect Statements:<\/h3>\n\n\n\n
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