{"id":213563,"date":"2025-05-11T18:24:29","date_gmt":"2025-05-11T18:24:29","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=213563"},"modified":"2025-05-11T18:24:31","modified_gmt":"2025-05-11T18:24:31","slug":"denaturing-followed-by-renaturing-of-a-protein-o-o-o-demonstrates-that-primary-structure-dictates-tertiary-structure","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/11\/denaturing-followed-by-renaturing-of-a-protein-o-o-o-demonstrates-that-primary-structure-dictates-tertiary-structure\/","title":{"rendered":"Denaturing followed by renaturing of a protein O O O demonstrates that primary structure dictates tertiary structure."},"content":{"rendered":"\n

Denaturing followed by renaturing of a protein O O O demonstrates that primary structure dictates tertiary structure. always results in the protein regaining its function. requires heat. requires breaking and reforming disulfide bonds<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer: Demonstrates that primary structure dictates tertiary structure.<\/strong><\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

Denaturing and renaturing of a protein demonstrate that the primary structure dictates the tertiary structure<\/strong> of the protein.<\/p>\n\n\n\n

Proteins are composed of amino acids arranged in a specific sequence known as the primary structure<\/strong>. This linear sequence of amino acids determines how the protein will fold into its functional three-dimensional shape, or tertiary structure<\/strong>. When a protein is denatured<\/strong>, its higher-level structures\u2014secondary, tertiary, and sometimes quaternary\u2014are disrupted, usually due to external stress such as heat, pH changes, or chemical agents. Denaturation does not break peptide bonds<\/strong> (which make up the primary structure), but it does affect hydrogen bonds, hydrophobic interactions, ionic bonds, and sometimes disulfide bridges.<\/p>\n\n\n\n

If the denaturing agent is removed and the environment returns to favorable conditions, some proteins can spontaneously refold into their original functional conformation<\/strong>. This process is called renaturation<\/strong>. The ability of a protein to renature properly without external assistance proves that the information needed for correct folding is contained entirely in the amino acid sequence<\/strong>, i.e., the primary structure<\/strong>. This was famously demonstrated in experiments by Christian Anfinsen with ribonuclease A, which regained its structure and function after denaturation and renaturation.<\/p>\n\n\n\n

Let\u2019s examine the other choices:<\/p>\n\n\n\n

    \n
  • \u201cAlways results in the protein regaining its function\u201d<\/strong> is incorrect. Not all proteins can refold correctly; some may aggregate or misfold.<\/li>\n\n\n\n
  • \u201cRequires heat\u201d<\/strong> is also incorrect. While heat is a common denaturing agent, denaturation can also be induced by acids, bases, detergents, or urea.<\/li>\n\n\n\n
  • \u201cRequires breaking and reforming disulfide bonds\u201d<\/strong> is only partially true. Disulfide bonds may be involved in stabilizing the tertiary structure, but they aren’t always broken during denaturation, and not all proteins contain disulfide bonds.<\/li>\n<\/ul>\n\n\n\n

    In conclusion, successful renaturation after denaturation demonstrates that a protein\u2019s tertiary structure is governed by its primary structure<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Denaturing followed by renaturing of a protein O O O demonstrates that primary structure dictates tertiary structure. always results in the protein regaining its function. requires heat. requires breaking and reforming disulfide bonds The Correct Answer and Explanation is: Correct Answer: Demonstrates that primary structure dictates tertiary structure. Explanation: Denaturing and renaturing of a protein […]<\/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-213563","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/213563","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=213563"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/213563\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=213563"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=213563"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=213563"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}