{"id":90587,"date":"2025-06-01T10:31:32","date_gmt":"2025-06-01T10:31:32","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90587"},"modified":"2025-06-01T10:31:32","modified_gmt":"2025-06-01T10:31:32","slug":"which-one-of-the-following-statements-about-life-processes-in-single-c","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-life-processes-in-single-c\/","title":{"rendered":"Which one of the following statements about life processes in single-c"},"content":{"rendered":"

Which one of the following statements about life processes in single-celled organisms is not correct?<\/p>\n

[amp_mcq option1=”They require separate organ for food uptake.” option2=”Separate organ is not needed for respiration.” option3=”Waste of excretory material is produced by these organisms.” option4=”They remain in contact with external environment.” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nSingle-celled organisms are prokaryotic or eukaryotic organisms consisting of a single cell. All necessary life processes, such as nutrition, respiration, excretion, and reproduction, occur within this single cell.
\n<\/section>\n
\nUnlike multicellular organisms which have specialized organs for specific functions, single-celled organisms perform all functions through the mechanisms available within that single cell. Food uptake in organisms like Amoeba occurs through processes like phagocytosis or pinocytosis across the cell membrane, not through a separate organ. Gaseous exchange for respiration and elimination of waste materials occur directly through diffusion across the cell surface, which is in direct contact with the external environment.
\n<\/section>\n
\nThe large surface area to volume ratio in single-celled organisms facilitates efficient exchange of materials, nutrients, gases, and waste products directly with their surroundings, making specialized organs unnecessary.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements about life processes in single-celled organisms is not correct? [amp_mcq option1=”They require separate organ for food uptake.” option2=”Separate organ is not needed for respiration.” option3=”Waste of excretory material is produced by these organisms.” option4=”They remain in contact with external environment.” correct=”option1″] This question was previously asked in UPSC CAPF … <\/p>\n

Detailed SolutionWhich one of the following statements about life processes in single-c<\/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":[1110,1117,1152],"class_list":["post-90587","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1110","tag-biology","tag-cell","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements about life processes in single-c<\/title>\n<meta name=\"description\" content=\"Single-celled organisms are prokaryotic or eukaryotic organisms consisting of a single cell. All necessary life processes, such as nutrition, respiration, excretion, and reproduction, occur within this single cell. Unlike multicellular organisms which have specialized organs for specific functions, single-celled organisms perform all functions through the mechanisms available within that single cell. Food uptake in organisms like Amoeba occurs through processes like phagocytosis or pinocytosis across the cell membrane, not through a separate organ. Gaseous exchange for respiration and elimination of waste materials occur directly through diffusion across the cell surface, which is in direct contact with the external environment.\" \/>\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-life-processes-in-single-c\/\" \/>\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 life processes in single-c\" \/>\n<meta property=\"og:description\" content=\"Single-celled organisms are prokaryotic or eukaryotic organisms consisting of a single cell. All necessary life processes, such as nutrition, respiration, excretion, and reproduction, occur within this single cell. 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