{"id":90211,"date":"2025-06-01T10:23:06","date_gmt":"2025-06-01T10:23:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90211"},"modified":"2025-06-01T10:23:06","modified_gmt":"2025-06-01T10:23:06","slug":"which-one-of-the-following-statements-about-transport-mechanism-in-pla","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/","title":{"rendered":"Which one of the following statements about transport mechanism in pla"},"content":{"rendered":"

Which one of the following statements about transport mechanism in plants is correct?<\/p>\n

[amp_mcq option1=”Diffusion of ions and small molecules across cell membrane requires energy.” option2=”Active transport of ions and small molecules across cell membrane against concentration gradient requires energy.” option3=”Cells conserve energy and no energy is required for transport of ions and small molecules against concentration gradient.” option4=”Cells do not transport ions across their membrane as these are charged molecules.” correct=”option2″]<\/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
\nThe correct answer is B) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy.
\n<\/section>\n
\nStatement A is incorrect: Diffusion (simple or facilitated) is a passive process driven by the concentration gradient; it does not require metabolic energy (ATP).
\nStatement B is correct: Active transport involves moving substances across a cell membrane against their concentration gradient (from a region of lower concentration to a region of higher concentration). This process requires the cell to expend metabolic energy, usually in the form of ATP, to power transport proteins (pumps).
\nStatement C is incorrect: Moving substances against a concentration gradient requires energy input. Cells use active transport precisely for this purpose, even though it consumes energy.
\nStatement D is incorrect: Cells regularly transport ions across their membranes using both passive mechanisms (ion channels) and active mechanisms (ion pumps) to maintain electrochemical gradients, osmotic balance, and for signalling. Ions are charged molecules, but their transport is essential for cell function.
\n<\/section>\n
\nTransport across cell membranes can be broadly classified into passive transport (diffusion, facilitated diffusion) and active transport. Passive transport does not require energy input and follows concentration gradients. Active transport requires energy and can move substances against gradients. Plants, like other organisms, use both types of transport for uptake of nutrients from the soil and for movement of substances within the plant.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements about transport mechanism in plants is correct? [amp_mcq option1=”Diffusion of ions and small molecules across cell membrane requires energy.” option2=”Active transport of ions and small molecules across cell membrane against concentration gradient requires energy.” option3=”Cells conserve energy and no energy is required for transport of ions and small molecules … <\/p>\n

Detailed SolutionWhich one of the following statements about transport mechanism in pla<\/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":[1114,1117,1118],"class_list":["post-90211","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1114","tag-biology","tag-plant-physiology","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements about transport mechanism in pla<\/title>\n<meta name=\"description\" content=\"The correct answer is B) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy. Statement A is incorrect: Diffusion (simple or facilitated) is a passive process driven by the concentration gradient; it does not require metabolic energy (ATP). Statement B is correct: Active transport involves moving substances across a cell membrane against their concentration gradient (from a region of lower concentration to a region of higher concentration). This process requires the cell to expend metabolic energy, usually in the form of ATP, to power transport proteins (pumps). Statement C is incorrect: Moving substances against a concentration gradient requires energy input. Cells use active transport precisely for this purpose, even though it consumes energy. Statement D is incorrect: Cells regularly transport ions across their membranes using both passive mechanisms (ion channels) and active mechanisms (ion pumps) to maintain electrochemical gradients, osmotic balance, and for signalling. Ions are charged molecules, but their transport is essential for cell function.\" \/>\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-about-transport-mechanism-in-pla\/\" \/>\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 about transport mechanism in pla\" \/>\n<meta property=\"og:description\" content=\"The correct answer is B) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy. Statement A is incorrect: Diffusion (simple or facilitated) is a passive process driven by the concentration gradient; it does not require metabolic energy (ATP). Statement B is correct: Active transport involves moving substances across a cell membrane against their concentration gradient (from a region of lower concentration to a region of higher concentration). This process requires the cell to expend metabolic energy, usually in the form of ATP, to power transport proteins (pumps). Statement C is incorrect: Moving substances against a concentration gradient requires energy input. Cells use active transport precisely for this purpose, even though it consumes energy. Statement D is incorrect: Cells regularly transport ions across their membranes using both passive mechanisms (ion channels) and active mechanisms (ion pumps) to maintain electrochemical gradients, osmotic balance, and for signalling. Ions are charged molecules, but their transport is essential for cell function.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:23:06+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 about transport mechanism in pla","description":"The correct answer is B) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy. Statement A is incorrect: Diffusion (simple or facilitated) is a passive process driven by the concentration gradient; it does not require metabolic energy (ATP). Statement B is correct: Active transport involves moving substances across a cell membrane against their concentration gradient (from a region of lower concentration to a region of higher concentration). This process requires the cell to expend metabolic energy, usually in the form of ATP, to power transport proteins (pumps). Statement C is incorrect: Moving substances against a concentration gradient requires energy input. Cells use active transport precisely for this purpose, even though it consumes energy. Statement D is incorrect: Cells regularly transport ions across their membranes using both passive mechanisms (ion channels) and active mechanisms (ion pumps) to maintain electrochemical gradients, osmotic balance, and for signalling. Ions are charged molecules, but their transport is essential for cell function.","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-about-transport-mechanism-in-pla\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements about transport mechanism in pla","og_description":"The correct answer is B) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy. Statement A is incorrect: Diffusion (simple or facilitated) is a passive process driven by the concentration gradient; it does not require metabolic energy (ATP). Statement B is correct: Active transport involves moving substances across a cell membrane against their concentration gradient (from a region of lower concentration to a region of higher concentration). This process requires the cell to expend metabolic energy, usually in the form of ATP, to power transport proteins (pumps). Statement C is incorrect: Moving substances against a concentration gradient requires energy input. Cells use active transport precisely for this purpose, even though it consumes energy. Statement D is incorrect: Cells regularly transport ions across their membranes using both passive mechanisms (ion channels) and active mechanisms (ion pumps) to maintain electrochemical gradients, osmotic balance, and for signalling. Ions are charged molecules, but their transport is essential for cell function.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:23:06+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-about-transport-mechanism-in-pla\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/","name":"Which one of the following statements about transport mechanism in pla","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:23:06+00:00","dateModified":"2025-06-01T10:23:06+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is B) Active transport of ions and small molecules across cell membrane against concentration gradient requires energy. Statement A is incorrect: Diffusion (simple or facilitated) is a passive process driven by the concentration gradient; it does not require metabolic energy (ATP). Statement B is correct: Active transport involves moving substances across a cell membrane against their concentration gradient (from a region of lower concentration to a region of higher concentration). This process requires the cell to expend metabolic energy, usually in the form of ATP, to power transport proteins (pumps). Statement C is incorrect: Moving substances against a concentration gradient requires energy input. Cells use active transport precisely for this purpose, even though it consumes energy. Statement D is incorrect: Cells regularly transport ions across their membranes using both passive mechanisms (ion channels) and active mechanisms (ion pumps) to maintain electrochemical gradients, osmotic balance, and for signalling. Ions are charged molecules, but their transport is essential for cell function.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-transport-mechanism-in-pla\/#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 about transport mechanism in pla"}]},{"@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\/90211","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=90211"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90211\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=90211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=90211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=90211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}