{"id":219874,"date":"2025-05-27T06:18:49","date_gmt":"2025-05-27T06:18:49","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=219874"},"modified":"2025-05-27T06:18:51","modified_gmt":"2025-05-27T06:18:51","slug":"drag-the-terms-on-the-left-to-the-appropriate-blanks-on-the-right-to-complete-the-sentences","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/27\/drag-the-terms-on-the-left-to-the-appropriate-blanks-on-the-right-to-complete-the-sentences\/","title":{"rendered":"Drag the terms on the left to the appropriate blanks on the right to complete the sentences."},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

Drag the terms on the left to the appropriate blanks on the right to complete the sentences. A phospholipid has a “head” made up of a glycerol molecule attached to a single, which is attached to another small molecule. Phospholipids vary in the small molecules attached to the phosphate group. The phospholipid shown in the figure has a attached to phosphate. Because the phosphate group and its attachments are either charged or polar, the phospholipid head is, which means it has an affinity for water. A phospholipid also has two “tails” made up of two molecules, which consist of a carboxyl group with a long hydrocarbon chain attached. Because the C – H bonds in the fatty acid tails are relatively nonpolar, the phospholipid tails are, which means they are excluded from water.<\/p>\n\n\n\n

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

Here are the correct terms placed in the blanks:<\/p>\n\n\n\n

    \n
  1. A phospholipid has a “head” made up of a glycerol molecule attached to a single phosphate group<\/strong>, which is attached to another small molecule.<\/li>\n\n\n\n
  2. Phospholipids vary in the small molecules attached to the phosphate group. The phospholipid shown in the figure has a choline group<\/strong> attached to phosphate.<\/li>\n\n\n\n
  3. Because the phosphate group and its attachments are either charged or polar, the phospholipid head is hydrophilic<\/strong>, which means it has an affinity for water.<\/li>\n\n\n\n
  4. A phospholipid also has two “tails” made up of two fatty acid<\/strong> molecules, which consist of a carboxyl group with a long hydrocarbon chain attached.<\/li>\n\n\n\n
  5. Because the C-H bonds in the fatty acid tails are relatively nonpolar, the phospholipid tails are hydrophobic<\/strong>, which means they are excluded from water.<\/li>\n<\/ol>\n\n\n\n
    \n\n\n\n

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

    Phospholipids are essential components of cell membranes, forming the structural basis of the lipid bilayer. Their unique chemical structure enables them to perform this role effectively.<\/p>\n\n\n\n

    A phospholipid molecule consists of two main parts: a hydrophilic “head” and two hydrophobic “tails.” The head is composed of a glycerol<\/strong> backbone bonded to a phosphate group<\/strong>, which in turn is attached to a small molecule such as choline<\/strong>. The presence of the negatively charged phosphate group and other polar attachments makes the head hydrophilic<\/strong>, meaning it has an affinity for water and can form hydrogen bonds with water molecules.<\/p>\n\n\n\n

    The two tails of the phospholipid are made up of fatty acid<\/strong> chains. These chains are long hydrocarbon structures that are nonpolar due to their abundance of carbon-hydrogen (C-H) bonds. Because they do not interact favorably with water, they are hydrophobic<\/strong>, meaning they repel water.<\/p>\n\n\n\n

    This amphipathic nature (having both hydrophilic and hydrophobic regions) allows phospholipids to spontaneously form bilayers in aqueous environments. In a bilayer, the hydrophilic heads face outward toward the water, while the hydrophobic tails are sequestered inside, away from water. This arrangement creates a semi-permeable membrane that is critical for controlling the passage of substances into and out of cells.<\/p>\n\n\n\n

    In summary, the phospholipid\u2019s structure\u2014specifically, the phosphate head group<\/strong> and fatty acid tails<\/strong>\u2014underpins its role in membrane formation and cellular function. Understanding these components helps explain the molecular basis of biological membranes and their dynamic behavior in cells.<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Drag the terms on the left to the appropriate blanks on the right to complete the sentences. A phospholipid has a “head” made up of a glycerol molecule attached to a single, which is attached to another small molecule. Phospholipids vary in the small molecules attached to the phosphate group. The phospholipid shown in the […]<\/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-219874","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/219874","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=219874"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/219874\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=219874"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=219874"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=219874"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}