{"id":88463,"date":"2025-06-01T07:11:43","date_gmt":"2025-06-01T07:11:43","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88463"},"modified":"2025-06-01T07:11:43","modified_gmt":"2025-06-01T07:11:43","slug":"the-oxygen-evolved-during-photosynthesis-comes-from-splitting-of","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-oxygen-evolved-during-photosynthesis-comes-from-splitting-of\/","title":{"rendered":"The oxygen evolved during photosynthesis comes from splitting of"},"content":{"rendered":"

The oxygen evolved during photosynthesis comes from splitting of<\/p>\n

[amp_mcq option1=”water” option2=”carbon dioxide” option3=”oxygen” option4=”light” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nDuring photosynthesis, the oxygen gas evolved as a byproduct comes from the splitting of water molecules (photolysis).
\n<\/section>\n
\n– The overall equation for photosynthesis is 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082.
\n– Experiments using isotopic tracing (specifically, using water labeled with the heavy oxygen isotope \u00b9\u2078O) demonstrated that the \u00b9\u2078O appeared in the evolved oxygen gas, while using carbon dioxide labeled with \u00b9\u2078O resulted in the \u00b9\u2078O appearing in the glucose product, not the oxygen gas.
\n<\/section>\n
\nWater splitting occurs during the light-dependent reactions of photosynthesis, providing electrons for the electron transport chain, protons for the proton gradient used in ATP synthesis, and oxygen as a waste product. The oxygen atoms in glucose are derived from carbon dioxide.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The oxygen evolved during photosynthesis comes from splitting of [amp_mcq option1=”water” option2=”carbon dioxide” option3=”oxygen” option4=”light” correct=”option1″] This question was previously asked in UPSC NDA-2 – 2018 Download PDFAttempt Online During photosynthesis, the oxygen gas evolved as a byproduct comes from the splitting of water molecules (photolysis). – The overall equation for photosynthesis is 6CO\u2082 + … <\/p>\n

Detailed SolutionThe oxygen evolved during photosynthesis comes from splitting of<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1094],"tags":[1114,1117,1331],"class_list":["post-88463","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1114","tag-biology","tag-photosynthesis","no-featured-image-padding"],"yoast_head":"\nThe oxygen evolved during photosynthesis comes from splitting of<\/title>\n<meta name=\"description\" content=\"During photosynthesis, the oxygen gas evolved as a byproduct comes from the splitting of water molecules (photolysis). - The overall equation for photosynthesis is 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. - Experiments using isotopic tracing (specifically, using water labeled with the heavy oxygen isotope \u00b9\u2078O) demonstrated that the \u00b9\u2078O appeared in the evolved oxygen gas, while using carbon dioxide labeled with \u00b9\u2078O resulted in the \u00b9\u2078O appearing in the glucose product, not the oxygen gas.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/the-oxygen-evolved-during-photosynthesis-comes-from-splitting-of\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The oxygen evolved during photosynthesis comes from splitting of\" \/>\n<meta property=\"og:description\" content=\"During photosynthesis, the oxygen gas evolved as a byproduct comes from the splitting of water molecules (photolysis). - The overall equation for photosynthesis is 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. - Experiments using isotopic tracing (specifically, using water labeled with the heavy oxygen isotope \u00b9\u2078O) demonstrated that the \u00b9\u2078O appeared in the evolved oxygen gas, while using carbon dioxide labeled with \u00b9\u2078O resulted in the \u00b9\u2078O appearing in the glucose product, not the oxygen gas.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-oxygen-evolved-during-photosynthesis-comes-from-splitting-of\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:11:43+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"The oxygen evolved during photosynthesis comes from splitting of","description":"During photosynthesis, the oxygen gas evolved as a byproduct comes from the splitting of water molecules (photolysis). - 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