{"id":215210,"date":"2025-05-17T02:12:58","date_gmt":"2025-05-17T02:12:58","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=215210"},"modified":"2025-05-17T02:13:00","modified_gmt":"2025-05-17T02:13:00","slug":"lets-address-each-multiple-choice-question-one-by-one","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/17\/lets-address-each-multiple-choice-question-one-by-one\/","title":{"rendered":"Let’s address each multiple-choice question one by one"},"content":{"rendered":"\n

Let’s address each multiple-choice question one by one:<\/strong><\/p>\n\n\n\n

\n\n\n\n

Question 1:<\/strong><\/h3>\n\n\n\n

The anticodon of a particular tRNA molecule is:<\/strong><\/p>\n\n\n\n

Correct Answer: (A) complementary to the corresponding mRNA codon.<\/strong><\/p>\n\n\n\n

Explanation:<\/strong><\/h4>\n\n\n\n

Transfer RNA (tRNA) plays a crucial role in translating the genetic code carried by messenger RNA (mRNA) into a specific sequence of amino acids to form a protein. Each tRNA molecule contains a specific anticodon<\/strong>, which is a sequence of three nucleotides<\/strong>. This anticodon is complementary<\/strong> to a codon on the mRNA strand.<\/p>\n\n\n\n

For example, if the mRNA codon is AUG<\/strong> (which codes for methionine), the corresponding tRNA anticodon would be UAC<\/strong>. This ensures that the correct amino acid (methionine, in this case) is brought to the ribosome during protein synthesis.<\/p>\n\n\n\n

    \n
  • Option B<\/strong> is incorrect because tRNA anticodons interact with mRNA<\/strong>, not rRNA<\/strong>.<\/li>\n\n\n\n
  • Option C<\/strong> is incorrect because the amino acid binding site<\/strong> is on the opposite end of the anticodon loop.<\/li>\n\n\n\n
  • Option D<\/strong> is incorrect because tRNAs are not ribozymes<\/strong> (although some RNAs, like rRNA, can have catalytic activity).<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    Question 2:<\/strong><\/h3>\n\n\n\n

    Which of the following is not true of RNA processing?<\/strong><\/p>\n\n\n\n

    Correct Answer: (A) Exons are cut out before mRNA leaves the nucleus.<\/strong><\/p>\n\n\n\n

    Explanation:<\/strong><\/h4>\n\n\n\n

    During RNA processing in eukaryotic cells<\/strong>, the initial RNA transcript (pre-mRNA) undergoes several modifications before it becomes mature mRNA ready for translation:<\/p>\n\n\n\n

      \n
    1. Introns<\/strong>, which are non-coding regions, are removed<\/strong>.<\/li>\n\n\n\n
    2. Exons<\/strong>, which are coding regions, are spliced together<\/strong> and retained<\/strong>.<\/li>\n\n\n\n
    3. A 5\u2032 cap<\/strong> is added to the beginning of the RNA.<\/li>\n\n\n\n
    4. A poly-A tail<\/strong> is added to the 3\u2032 end.<\/li>\n<\/ol>\n\n\n\n

      The incorrect statement is (A) because exons are not cut out<\/strong>. Instead, introns<\/strong> are the parts that are removed<\/strong>, and exons remain<\/strong> in the final processed mRNA.<\/p>\n\n\n\n

        \n
      • Option B<\/strong> is true: Nucleotides are added at both ends (5\u2032 cap and poly-A tail).<\/li>\n\n\n\n
      • Option C<\/strong> is true: Some ribozymes<\/strong> (RNA molecules with catalytic activity) can catalyze RNA splicing.<\/li>\n\n\n\n
      • Option D<\/strong> is true: Spliceosomes<\/strong>, large RNA-protein complexes, carry out RNA splicing.<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        Summary:<\/h3>\n\n\n\n
          \n
        • The anticodon<\/strong> of tRNA is complementary to the mRNA codon<\/strong>.<\/li>\n\n\n\n
        • During RNA processing, exons are not removed<\/strong>\u2014they are preserved; introns<\/strong> are removed.<\/li>\n<\/ul>\n\n\n\n

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

          Let’s address each multiple-choice question one by one: Question 1: The anticodon of a particular tRNA molecule is: Correct Answer: (A) complementary to the corresponding mRNA codon. Explanation: Transfer RNA (tRNA) plays a crucial role in translating the genetic code carried by messenger RNA (mRNA) into a specific sequence of amino acids to form a […]<\/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-215210","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215210","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=215210"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/215210\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=215210"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=215210"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=215210"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}