{"id":249234,"date":"2025-07-09T05:11:36","date_gmt":"2025-07-09T05:11:36","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=249234"},"modified":"2025-07-09T05:11:39","modified_gmt":"2025-07-09T05:11:39","slug":"coo-h_3n-c-h-texta-ch_3-c","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/09\/coo-h_3n-c-h-texta-ch_3-c\/","title":{"rendered":"COO^+ H_3N-C-H \\text{A.} CH_3 C"},"content":{"rendered":"\n

COO
^+ H_3N-C-H \\text{A.} CH_3 C<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

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

Correct Answer:<\/strong> Alanine<\/p>\n\n\n\n

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

The chemical structure shown in the image is the amino acid Alanine<\/strong>.<\/p>\n\n\n\n

Amino acids are the fundamental building blocks of proteins. All 20 common amino acids share a core structure consisting of a central carbon atom, known as the alpha-carbon, bonded to four distinct groups:<\/p>\n\n\n\n

    \n
  1. An amino group (-NH\u2082)<\/li>\n\n\n\n
  2. A carboxyl group (-COOH)<\/li>\n\n\n\n
  3. A hydrogen atom (-H)<\/li>\n\n\n\n
  4. A variable side chain, or R-group, which is unique to each amino acid.<\/li>\n<\/ol>\n\n\n\n

    In the provided image, we can identify these components. The central carbon (C) is bonded to:<\/p>\n\n\n\n

      \n
    • An amino group, labeled\u00a0A<\/strong>. It is shown in its protonated form (\u207aH\u2083N-), carrying a positive charge.<\/li>\n\n\n\n
    • A carboxyl group, labeled\u00a0B<\/strong>. It is depicted in its deprotonated, or carboxylate, form (COO\u207b), carrying a negative charge.<\/li>\n\n\n\n
    • A hydrogen atom (H).<\/li>\n\n\n\n
    • A side chain (R-group), labeled\u00a0C<\/strong>, which is a methyl group (-CH\u2083).<\/li>\n<\/ul>\n\n\n\n

      The identity of an amino acid is determined by its side chain. The amino acid with a methyl group as its R-group is Alanine. Because its side chain is composed only of carbon and hydrogen, Alanine is classified as a nonpolar, aliphatic amino acid. Its small, non-reactive side chain makes it chemically inert and versatile in protein structures.<\/p>\n\n\n\n

      The molecule is shown in its zwitterionic form<\/strong>. At physiological pH (around 7.4), the basic amino group is protonated (gains a proton, H\u207a), and the acidic carboxyl group is deprotonated (loses a proton). This results in a molecule with both a positive and a negative charge but an overall neutral charge. This zwitterionic state is the predominant form of amino acids in neutral aqueous solutions.<\/p>\n\n\n\n

      Furthermore, the alpha-carbon in Alanine is a chiral center because it is attached to four different groups. This means Alanine can exist in two mirror-image forms (enantiomers), L-Alanine and D-Alanine, with L-Alanine being the form incorporated into proteins in living organisms.<\/p>\n\n\n\n

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

      COO^+ H_3N-C-H \\text{A.} CH_3 C The Correct Answer and Explanation is: Correct Answer: Alanine Explanation: The chemical structure shown in the image is the amino acid Alanine. Amino acids are the fundamental building blocks of proteins. All 20 common amino acids share a core structure consisting of a central carbon atom, known as the alpha-carbon, bonded to […]<\/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-249234","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/249234","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=249234"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/249234\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=249234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=249234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=249234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}