{"id":209443,"date":"2025-04-29T05:52:55","date_gmt":"2025-04-29T05:52:55","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=209443"},"modified":"2025-04-29T05:52:59","modified_gmt":"2025-04-29T05:52:59","slug":"jose-and-rema-are-making-sourdough-bread","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/29\/jose-and-rema-are-making-sourdough-bread\/","title":{"rendered":"Jose and Rema are making sourdough bread"},"content":{"rendered":"\n<p>Jose and Rema are making sourdough bread. They have been feeding the starter dough for a week now, and it has undergone lactic acid fermentation. They mix the dough and add a portion of the starter, which will give the bread its famous texture and sour flavor. A. Alcoholic fermentation takes place, and the yeast give off oxygen, creating pockets in the dough. B. Alcoholic fermentation takes place and ethyl alcohol and CO2 gas are formed, creating pockets in the dough. C. Alcoholic fermentation takes place, and the H2O byproduct of the electron transport chain vaporizes to create pockets in the dough.<\/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<p>The correct answer is <strong>B. Alcoholic fermentation takes place and ethyl alcohol and CO2 gas are formed, creating pockets in the dough.<\/strong><\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>When making sourdough bread, Jose and Rema are using a starter dough that has been fermenting for a week. The fermentation process involves both lactic acid fermentation (which is the primary type of fermentation in sourdough starter) and alcoholic fermentation. To understand this better, let&#8217;s look at the two types of fermentation involved in bread making:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Lactic Acid Fermentation:<\/strong> The sourdough starter is rich in wild yeast and bacteria, particularly <em>Lactobacillus<\/em> species. The bacteria undergo lactic acid fermentation, where sugars from the flour are broken down into lactic acid. This process contributes to the characteristic tangy flavor of sourdough bread. Lactic acid fermentation, however, does not significantly affect the dough&#8217;s rise or texture.<\/li>\n\n\n\n<li><strong>Alcoholic Fermentation (for bread rise):<\/strong> The main process that gives the dough its rise and texture is <strong>alcoholic fermentation<\/strong>. When the dough is mixed with a portion of the starter, the yeast present in the starter (which are typically <em>Saccharomyces cerevisiae<\/em> or similar species) undergo alcoholic fermentation. In this process, yeast cells consume sugars present in the flour and convert them into <strong>ethyl alcohol (ethanol)<\/strong> and <strong>carbon dioxide (CO2)<\/strong>.\n<ul class=\"wp-block-list\">\n<li><strong>Carbon dioxide (CO2)<\/strong> is the key byproduct in bread making. As it is produced by the yeast, it gets trapped in the dough, forming <strong>gas bubbles<\/strong> or pockets. This is what causes the dough to rise, creating the airy texture characteristic of well-baked bread.<\/li>\n\n\n\n<li><strong>Ethyl alcohol (ethanol)<\/strong> is another byproduct of fermentation, though most of it evaporates during the baking process.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p><strong>Why the other answers are incorrect:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A<\/strong> is incorrect because yeast does not give off oxygen during fermentation. In fact, yeast uses oxygen initially for aerobic respiration, but once oxygen is depleted, it switches to anaerobic fermentation processes.<\/li>\n\n\n\n<li><strong>C<\/strong> is incorrect because H2O (water) is not the primary byproduct in alcoholic fermentation. The byproducts are ethanol and CO2. The water produced during cellular respiration is in minimal amounts compared to CO2.<\/li>\n<\/ul>\n\n\n\n<p>In summary, the key process that contributes to the bread&#8217;s texture and rise is alcoholic fermentation, which generates CO2 gas that creates pockets in the dough.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jose and Rema are making sourdough bread. They have been feeding the starter dough for a week now, and it has undergone lactic acid fermentation. They mix the dough and add a portion of the starter, which will give the bread its famous texture and sour flavor. A. Alcoholic fermentation takes place, and the yeast [&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-209443","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209443","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=209443"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209443\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=209443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=209443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=209443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}