{"id":244271,"date":"2025-07-05T02:49:20","date_gmt":"2025-07-05T02:49:20","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=244271"},"modified":"2025-07-05T02:49:22","modified_gmt":"2025-07-05T02:49:22","slug":"chemistry-the-two-amino-acids-having-r-groups-with-a-negative-net-charge-at-ph-7-0-are-cysteine-and-methionine-aspartate-and-glutamate-proline-and-valine-arginine-and-histidine-next","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/05\/chemistry-the-two-amino-acids-having-r-groups-with-a-negative-net-charge-at-ph-7-0-are-cysteine-and-methionine-aspartate-and-glutamate-proline-and-valine-arginine-and-histidine-next\/","title":{"rendered":"CHEMISTRY The two amino acids having R groups with a negative net charge at pH 7.0 are Cysteine and methionine Aspartate and glutamate Proline and valine Arginine and histidine Next"},"content":{"rendered":"\n

CHEMISTRY The two amino acids having R groups with a negative net charge at pH 7.0 are Cysteine and methionine Aspartate and glutamate Proline and valine Arginine and histidine Next This form was created inside of University of Babylon: Report Abuse Google Forms<\/p>\n\n\n\n

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

The correct answer is Aspartate and glutamate<\/strong>.<\/p>\n\n\n\n

Explanation:<\/p>\n\n\n\n

At physiological pH (around 7.0), amino acids with side chains that can lose a proton (become negatively charged) typically have acidic functional groups. These side chains are known to have a negative net charge<\/strong> at this pH.<\/p>\n\n\n\n

    \n
  1. Aspartate (Asp)<\/strong> and glutamate (Glu)<\/strong> are the two amino acids with carboxylate groups (-COO\u207b) in their side chains. The carboxyl group can dissociate, losing a proton (H\u207a) and thereby carrying a negative charge at physiological pH (pH 7.0). This makes both of these amino acids negatively charged at this pH.<\/li>\n\n\n\n
  2. Cysteine<\/strong> and methionine<\/strong> do not have acidic side chains; cysteine has a thiol group (-SH), which does not ionize significantly at pH 7.0. Methionine has a non-polar side chain and thus does not carry a charge at physiological pH.<\/li>\n\n\n\n
  3. Proline<\/strong> and valine<\/strong> both have non-polar side chains and do not have acidic or basic groups that can gain or lose protons. Therefore, they do not have a net negative charge at pH 7.0.<\/li>\n\n\n\n
  4. Arginine<\/strong> and histidine<\/strong> have positively charged side chains (due to the presence of amino groups in their side chains), so they would have a positive net charge at physiological pH, not a negative one.<\/li>\n<\/ol>\n\n\n\n

    Thus, aspartate<\/strong> and glutamate<\/strong> are the amino acids that have R groups with a negative net charge at pH 7.0.<\/p>\n\n\n\n

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

    CHEMISTRY The two amino acids having R groups with a negative net charge at pH 7.0 are Cysteine and methionine Aspartate and glutamate Proline and valine Arginine and histidine Next This form was created inside of University of Babylon: Report Abuse Google Forms The Correct Answer and Explanation is: The correct answer is Aspartate and […]<\/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-244271","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/244271","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=244271"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/244271\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=244271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=244271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=244271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}