{"id":192768,"date":"2025-02-18T07:23:25","date_gmt":"2025-02-18T07:23:25","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=192768"},"modified":"2025-02-18T07:23:28","modified_gmt":"2025-02-18T07:23:28","slug":"what-3-codons-act-as-termination-signals","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/18\/what-3-codons-act-as-termination-signals\/","title":{"rendered":"What 3 codons act as termination signals"},"content":{"rendered":"\n

What 3 codons act as termination signals? 2. What codon means start? 3. List ALL of the codons for leucine. Name ALL the codons for these amino acids: 4. Phenylalanine- 5. Serine- 6. Isoleucine – 7. Valine – 9.Glycine 10. Alanine- 11. If the DNA sequence is\u2026 AAA TAT CCG TAG CAA ATG, write the mRNA sequence, tRNA anticodon sequence, and the six amino acids for this. DNA AAA TAT CCG TAG CAA ATG mRNA tRNA Amino acids<\/p>\n\n\n\n

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

    \n
  1. Codons that act as termination signals (Stop Codons):<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n
    • UAA<\/li>\n\n\n\n
    • UAG<\/li>\n\n\n\n
    • UGA<\/li>\n<\/ul>\n\n\n\n

      These codons signal the termination of protein synthesis, causing the ribosome to release the polypeptide chain.<\/p>\n\n\n\n

        \n
      1. Start Codon:<\/strong><\/li>\n<\/ol>\n\n\n\n
          \n
        • AUG (Methionine)<\/li>\n<\/ul>\n\n\n\n

          This codon signals the start of translation, where the ribosome begins assembling a protein by linking amino acids together.<\/p>\n\n\n\n

            \n
          1. Codons for Leucine:<\/strong><\/li>\n<\/ol>\n\n\n\n
              \n
            • UUA<\/li>\n\n\n\n
            • UUG<\/li>\n\n\n\n
            • CUU<\/li>\n\n\n\n
            • CUC<\/li>\n\n\n\n
            • CUA<\/li>\n\n\n\n
            • CUG<\/li>\n<\/ul>\n\n\n\n

              Leucine is encoded by these six codons in the genetic code.<\/p>\n\n\n\n

                \n
              1. Codons for Phenylalanine:<\/strong><\/li>\n<\/ol>\n\n\n\n
                  \n
                • UUU<\/li>\n\n\n\n
                • UUC<\/li>\n<\/ul>\n\n\n\n

                  Phenylalanine is encoded by these two codons.<\/p>\n\n\n\n

                    \n
                  1. Codons for Serine:<\/strong><\/li>\n<\/ol>\n\n\n\n
                      \n
                    • UCU<\/li>\n\n\n\n
                    • UCC<\/li>\n\n\n\n
                    • UCA<\/li>\n\n\n\n
                    • UCG<\/li>\n\n\n\n
                    • AGU<\/li>\n\n\n\n
                    • AGC<\/li>\n<\/ul>\n\n\n\n

                      Serine is encoded by these six codons.<\/p>\n\n\n\n

                        \n
                      1. Codons for Isoleucine:<\/strong><\/li>\n<\/ol>\n\n\n\n
                          \n
                        • AUU<\/li>\n\n\n\n
                        • AUC<\/li>\n\n\n\n
                        • AUA<\/li>\n<\/ul>\n\n\n\n

                          Isoleucine is encoded by these three codons.<\/p>\n\n\n\n

                            \n
                          1. Codons for Valine:<\/strong><\/li>\n<\/ol>\n\n\n\n
                              \n
                            • GUU<\/li>\n\n\n\n
                            • GUC<\/li>\n\n\n\n
                            • GUA<\/li>\n\n\n\n
                            • GUG<\/li>\n<\/ul>\n\n\n\n

                              Valine is encoded by these four codons.<\/p>\n\n\n\n

                                \n
                              1. Codons for Glycine:<\/strong><\/li>\n<\/ol>\n\n\n\n
                                  \n
                                • GGU<\/li>\n\n\n\n
                                • GGC<\/li>\n\n\n\n
                                • GGA<\/li>\n\n\n\n
                                • GGG<\/li>\n<\/ul>\n\n\n\n

                                  Glycine is encoded by these four codons.<\/p>\n\n\n\n

                                    \n
                                  1. Codons for Alanine:<\/strong><\/li>\n<\/ol>\n\n\n\n
                                      \n
                                    • GCU<\/li>\n\n\n\n
                                    • GCC<\/li>\n\n\n\n
                                    • GCA<\/li>\n\n\n\n
                                    • GCG<\/li>\n<\/ul>\n\n\n\n

                                      Alanine is encoded by these four codons.<\/p>\n\n\n\n

                                      \n\n\n\n

                                      DNA Sequence:<\/strong> AAA TAT CCG TAG CAA ATG<\/p>\n\n\n\n

                                      mRNA Sequence:<\/strong><\/p>\n\n\n\n

                                        \n
                                      • The mRNA is transcribed from the DNA sequence, replacing thymine (T) with uracil (U):<\/li>\n\n\n\n
                                      • AAA \u2192 UUU<\/li>\n\n\n\n
                                      • TAT \u2192 AUA<\/li>\n\n\n\n
                                      • CCG \u2192 GGC<\/li>\n\n\n\n
                                      • TAG \u2192 AUC (Stop codon)<\/li>\n\n\n\n
                                      • CAA \u2192 GUU<\/li>\n\n\n\n
                                      • ATG \u2192 UAC So, the mRNA sequence is: UUU AUA GGC AUC GUU UAC<\/strong><\/li>\n<\/ul>\n\n\n\n

                                        tRNA Anticodon Sequence:<\/strong><\/p>\n\n\n\n

                                          \n
                                        • The tRNA anticodon is complementary to the mRNA codon:<\/li>\n\n\n\n
                                        • UUU \u2192 AAA<\/li>\n\n\n\n
                                        • AUA \u2192 UAU<\/li>\n\n\n\n
                                        • GGC \u2192 CCG<\/li>\n\n\n\n
                                        • AUC \u2192 UAG<\/li>\n\n\n\n
                                        • GUU \u2192 CAA<\/li>\n\n\n\n
                                        • UAC \u2192 AUG So, the tRNA anticodon sequence is: AAA UAU CCG UAG CAA AUG<\/strong><\/li>\n<\/ul>\n\n\n\n

                                          Amino Acids:<\/strong><\/p>\n\n\n\n

                                            \n
                                          • Using the mRNA codons to find the corresponding amino acids:<\/li>\n\n\n\n
                                          • UUU \u2192 Phenylalanine (Phe)<\/li>\n\n\n\n
                                          • AUA \u2192 Isoleucine (Ile)<\/li>\n\n\n\n
                                          • GGC \u2192 Glycine (Gly)<\/li>\n\n\n\n
                                          • AUC \u2192 Isoleucine (Ile)<\/li>\n\n\n\n
                                          • GUU \u2192 Valine (Val)<\/li>\n\n\n\n
                                          • UAC \u2192 Tyrosine (Tyr) So, the amino acids are: Phe, Ile, Gly, Ile, Val, Tyr<\/strong><\/li>\n<\/ul>\n\n\n\n

                                            Let me generate the visual representation of this process for you.<\/p>\n\n\n\n

                                            Here’s the illustration of the transcription and translation process in protein synthesis, showing the DNA sequence, mRNA, tRNA anticodons, and the corresponding amino acids. Let me know if you’d like any further explanation or additional details!<\/p>\n\n\n\n

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

                                            What 3 codons act as termination signals? 2. What codon means start? 3. List ALL of the codons for leucine. Name ALL the codons for these amino acids: 4. Phenylalanine- 5. Serine- 6. Isoleucine – 7. Valine – 9.Glycine 10. Alanine- 11. If the DNA sequence is\u2026 AAA TAT CCG TAG CAA ATG, write 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-192768","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/192768","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=192768"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/192768\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=192768"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=192768"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=192768"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}