{"id":90228,"date":"2025-06-01T10:23:30","date_gmt":"2025-06-01T10:23:30","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90228"},"modified":"2025-06-01T10:23:30","modified_gmt":"2025-06-01T10:23:30","slug":"which-one-of-the-following-statements-is-correct-34","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/","title":{"rendered":"Which one of the following statements is correct?"},"content":{"rendered":"

Which one of the following statements is correct?<\/p>\n

[amp_mcq option1=”In photosynthesis by green plants, carbon dioxide is used for making carbohydrate.” option2=”During photosynthesis, plants use oxygen for making carbohydrate.” option3=”The carbohydrate generated by plants comes from soil.” option4=”The carbohydrate generated by plants comes from urea.” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nPhotosynthesis is the process by which green plants convert light energy into chemical energy in the form of organic compounds (carbohydrates). The inputs for photosynthesis are carbon dioxide (CO\u2082) and water (H\u2082O), and the outputs are glucose (a carbohydrate, C\u2086H\u2081\u2082O\u2086) and oxygen (O\u2082). The overall chemical equation is approximately 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. This equation shows that carbon dioxide is directly incorporated into the carbohydrate molecule. Plants absorb CO\u2082 from the atmosphere through their stomata.
\nLet’s evaluate the other options:
\nB) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate.
\nC) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide.
\nD) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO\u2082.
\nTherefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis.
\n<\/section>\n
\nIn photosynthesis, plants use carbon dioxide and water, with the help of light energy and chlorophyll, to synthesize carbohydrates and release oxygen. Carbon dioxide is the source of carbon atoms in the carbohydrate.
\n<\/section>\n
\nPhotosynthesis occurs in two main stages: the light-dependent reactions (where light energy is converted into chemical energy in the form of ATP and NADPH, and water is split) and the light-independent reactions (Calvin cycle), where the chemical energy is used to fix carbon dioxide and synthesize glucose.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is correct? [amp_mcq option1=”In photosynthesis by green plants, carbon dioxide is used for making carbohydrate.” option2=”During photosynthesis, plants use oxygen for making carbohydrate.” option3=”The carbohydrate generated by plants comes from soil.” option4=”The carbohydrate generated by plants comes from urea.” correct=”option1″] This question was previously asked in UPSC CAPF – … <\/p>\n

Detailed SolutionWhich one of the following statements is correct?<\/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":[1085],"tags":[1114,1117,1331],"class_list":["post-90228","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1114","tag-biology","tag-photosynthesis","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is correct?<\/title>\n<meta name=\"description\" content=\"Photosynthesis is the process by which green plants convert light energy into chemical energy in the form of organic compounds (carbohydrates). The inputs for photosynthesis are carbon dioxide (CO\u2082) and water (H\u2082O), and the outputs are glucose (a carbohydrate, C\u2086H\u2081\u2082O\u2086) and oxygen (O\u2082). The overall chemical equation is approximately 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. This equation shows that carbon dioxide is directly incorporated into the carbohydrate molecule. Plants absorb CO\u2082 from the atmosphere through their stomata. Let's evaluate the other options: B) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate. C) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide. D) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO\u2082. Therefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis. In photosynthesis, plants use carbon dioxide and water, with the help of light energy and chlorophyll, to synthesize carbohydrates and release oxygen. Carbon dioxide is the source of carbon atoms in the carbohydrate.\" \/>\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\/which-one-of-the-following-statements-is-correct-34\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following statements is correct?\" \/>\n<meta property=\"og:description\" content=\"Photosynthesis is the process by which green plants convert light energy into chemical energy in the form of organic compounds (carbohydrates). The inputs for photosynthesis are carbon dioxide (CO\u2082) and water (H\u2082O), and the outputs are glucose (a carbohydrate, C\u2086H\u2081\u2082O\u2086) and oxygen (O\u2082). The overall chemical equation is approximately 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. This equation shows that carbon dioxide is directly incorporated into the carbohydrate molecule. Plants absorb CO\u2082 from the atmosphere through their stomata. Let's evaluate the other options: B) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate. C) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide. D) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO\u2082. Therefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis. In photosynthesis, plants use carbon dioxide and water, with the help of light energy and chlorophyll, to synthesize carbohydrates and release oxygen. Carbon dioxide is the source of carbon atoms in the carbohydrate.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:23:30+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which one of the following statements is correct?","description":"Photosynthesis is the process by which green plants convert light energy into chemical energy in the form of organic compounds (carbohydrates). The inputs for photosynthesis are carbon dioxide (CO\u2082) and water (H\u2082O), and the outputs are glucose (a carbohydrate, C\u2086H\u2081\u2082O\u2086) and oxygen (O\u2082). The overall chemical equation is approximately 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. This equation shows that carbon dioxide is directly incorporated into the carbohydrate molecule. Plants absorb CO\u2082 from the atmosphere through their stomata. Let's evaluate the other options: B) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate. C) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide. D) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO\u2082. Therefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis. In photosynthesis, plants use carbon dioxide and water, with the help of light energy and chlorophyll, to synthesize carbohydrates and release oxygen. Carbon dioxide is the source of carbon atoms in the carbohydrate.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is correct?","og_description":"Photosynthesis is the process by which green plants convert light energy into chemical energy in the form of organic compounds (carbohydrates). The inputs for photosynthesis are carbon dioxide (CO\u2082) and water (H\u2082O), and the outputs are glucose (a carbohydrate, C\u2086H\u2081\u2082O\u2086) and oxygen (O\u2082). The overall chemical equation is approximately 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. This equation shows that carbon dioxide is directly incorporated into the carbohydrate molecule. Plants absorb CO\u2082 from the atmosphere through their stomata. Let's evaluate the other options: B) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate. C) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide. D) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO\u2082. Therefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis. In photosynthesis, plants use carbon dioxide and water, with the help of light energy and chlorophyll, to synthesize carbohydrates and release oxygen. Carbon dioxide is the source of carbon atoms in the carbohydrate.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:23:30+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/","name":"Which one of the following statements is correct?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:23:30+00:00","dateModified":"2025-06-01T10:23:30+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Photosynthesis is the process by which green plants convert light energy into chemical energy in the form of organic compounds (carbohydrates). The inputs for photosynthesis are carbon dioxide (CO\u2082) and water (H\u2082O), and the outputs are glucose (a carbohydrate, C\u2086H\u2081\u2082O\u2086) and oxygen (O\u2082). The overall chemical equation is approximately 6CO\u2082 + 6H\u2082O + Light Energy \u2192 C\u2086H\u2081\u2082O\u2086 + 6O\u2082. This equation shows that carbon dioxide is directly incorporated into the carbohydrate molecule. Plants absorb CO\u2082 from the atmosphere through their stomata. Let's evaluate the other options: B) Oxygen is produced as a byproduct during photosynthesis, not used to make carbohydrate. C) While water and minerals essential for plant growth come from the soil, the carbon atoms that form the backbone of the carbohydrate molecule come from atmospheric carbon dioxide. D) Urea is a nitrogenous compound used as a fertilizer to provide nitrogen for plant growth. Nitrogen is essential for synthesizing proteins and nucleic acids, but the carbon backbone of carbohydrates comes from CO\u2082. Therefore, the correct statement is that carbon dioxide is used for making carbohydrate in photosynthesis. In photosynthesis, plants use carbon dioxide and water, with the help of light energy and chlorophyll, to synthesize carbohydrates and release oxygen. Carbon dioxide is the source of carbon atoms in the carbohydrate.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-34\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"Which one of the following statements is correct?"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90228","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=90228"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90228\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=90228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=90228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=90228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}