{"id":194365,"date":"2025-02-24T05:06:24","date_gmt":"2025-02-24T05:06:24","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=194365"},"modified":"2025-02-24T05:06:27","modified_gmt":"2025-02-24T05:06:27","slug":"catecholase-is-an-enzyme-found-in-potatoes","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/24\/catecholase-is-an-enzyme-found-in-potatoes\/","title":{"rendered":"Catecholase is an enzyme found in potatoes"},"content":{"rendered":"\n<p>Catecholase is an enzyme found in potatoes. This enzyme works to turn the catechol in the potato to benzoquinone. Benzoquinone is a reddish brown color. Based on this information, read the following prompt and answer the question. A freshly cut potato turns brown when left standing. Why do mashed potatoes stay white? (Choose all that apply)<\/p>\n\n\n\n<p>The catecholase in the fresh potato turned catechol into benzoquinone<\/p>\n\n\n\n<p>The catecholase in the fresh potato became denatured and as a result was not able to turn catechol into benzoquinone<\/p>\n\n\n\n<p>The catecholase in the mashed potato became denatured and as a result was not able to turn catechol into benzoquinone<\/p>\n\n\n\n<p>The catecholase in the mashed potato turned catechol into benzoquinone<\/p>\n\n\n\n<p>The catecholase in the fresh potato was able to lower the activation energy of the chemical reaction<\/p>\n\n\n\n<p>The catecholase in the mashed potato was able to lower the activation energy of the chemical reaction<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Correct Answers:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The catecholase in the mashed potato became denatured and as a result was not able to turn catechol into benzoquinone<\/strong><\/li>\n\n\n\n<li><strong>The catecholase in the fresh potato turned catechol into benzoquinone<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>When a fresh potato is cut and exposed to air, it undergoes a browning reaction due to the enzyme <strong>catecholase<\/strong> (also known as polyphenol oxidase). This enzyme catalyzes the oxidation of <strong>catechol<\/strong> (a naturally occurring compound in potatoes) into <strong>benzoquinone<\/strong>, which is reddish-brown in color. This reaction is similar to how apples and bananas turn brown when cut and exposed to oxygen.<\/p>\n\n\n\n<p>However, mashed potatoes <strong>do not turn brown<\/strong> like fresh-cut potatoes. This is because the cooking process used to prepare mashed potatoes involves <strong>boiling or steaming<\/strong>, which exposes the potatoes to high temperatures. <strong>High temperatures cause the enzyme catecholase to denature<\/strong>, meaning that its protein structure is altered in such a way that it can no longer function. Since the enzyme is no longer active, it cannot catalyze the reaction that converts catechol into benzoquinone, preventing browning.<\/p>\n\n\n\n<p>In contrast, in a freshly cut, raw potato, catecholase remains <strong>active<\/strong> because the potato has not been exposed to heat or other denaturing conditions. As a result, when the cut surface is exposed to oxygen, the enzyme facilitates the conversion of catechol into benzoquinone, leading to the characteristic brown discoloration.<\/p>\n\n\n\n<p>Therefore, mashed potatoes stay <strong>white<\/strong> because the <strong>catecholase enzyme is denatured during cooking and cannot catalyze the reaction<\/strong>, while fresh-cut potatoes turn brown because the enzyme remains active and completes the oxidation process.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Image Generation:<\/h3>\n\n\n\n<p>I will now generate an image illustrating the enzymatic browning process in fresh-cut potatoes and the absence of browning in mashed potatoes.<\/p>\n\n\n\n<p>Here is the generated scientific illustration comparing a fresh-cut potato (which turns brown due to enzymatic oxidation) and mashed potatoes (which remain white due to enzyme denaturation). Let me know if you need any modifications!<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-1305.png\" alt=\"\" class=\"wp-image-194366\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Catecholase is an enzyme found in potatoes. This enzyme works to turn the catechol in the potato to benzoquinone. Benzoquinone is a reddish brown color. Based on this information, read the following prompt and answer the question. A freshly cut potato turns brown when left standing. Why do mashed potatoes stay white? (Choose all that [&hellip;]<\/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-194365","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194365","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=194365"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/194365\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=194365"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=194365"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=194365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}