DNA molek\u00fcl\u00fcn\u00fcn bir b\u00f6l\u00fcm\u00fc olan her bir \u2018gen\u2019 insan v\u00fcc\u00fcd\u00fcndaki belli bir \u00f6zelli\u011fi kontrol eder. Canl\u0131n\u0131n v\u00fccut \u015fekli, her organ\u0131na ait i\u015f b\u00f6l\u00fcm\u00fc ve bu organlar\u0131n \u00e7al\u0131\u015fma d\u00fczenleri, h\u00fccre i\u00e7inde \u00fcretilmesi gereken proteinlerin genetik kodlar\u0131, \u00fcretilecek proteinlerin miktar kontrolleri (gen reg\u00fclasyonu) gibi canl\u0131n\u0131n hayat\u0131n\u0131 devam ettirmesi i\u00e7in gereken \u015feyler DNA \u00fczerinde planlanm\u0131\u015f, kodlanm\u0131\u015ft\u0131r.
\nDNA\u2019n\u0131n h\u00fccredeki yeri
\n\u0130nsan h\u00fccrelerinde bulunan DNA yakla\u015f\u0131k 3 milyar baz \u00e7iftinden olu\u015fmu\u015ftur ve yakla\u015f\u0131k 1 metre uzunlu\u011fundad\u0131r. Bu 1 metre uzunlu\u011fundaki polimer, g\u00f6z\u00fcm\u00fczle bile g\u00f6remedi\u011fimiz k\u00fc\u00e7\u00fckl\u00fckteki h\u00fccrenin \u00e7ekirde\u011finde saklanmaktad\u0131r. \u2018Histon\u2019 denilen proteinlere sar\u0131larak paketlenip kromozomlar\u0131 olu\u015fturan DNA bulundu\u011fu k\u00fc\u00e7\u00fcc\u00fck yerde oldu\u011fu gibi durmamakta, gerekli olan gen b\u00f6lgeleri enzimler vas\u0131tas\u0131 ile a\u00e7\u0131l\u0131p kodlar\u0131n mRNA (messenger ribon\u00fckleik asit) denilen bir ba\u015fka molek\u00fcl vas\u0131tas\u0131 ile kopyalar\u0131 \u00e7\u0131kart\u0131l\u0131p, bu kopya vas\u0131tas\u0131 ile proteinler sentezlenmektedir . Gerekli b\u00f6lge bu \u015fekilde okunduktan sonra DNA zinciri yine eski paketli haline d\u00f6nmektedir. Ancak bir d\u00fc\u015f\u00fcn\u00fcn ayn\u0131 anda bir de\u011fil belki onlarca farkl\u0131 b\u00f6lgeden DNA a\u00e7\u0131l\u0131p, gen \u015fifreleri okunup yine kapat\u0131lmaktad\u0131r. Bir iplik yuma\u011f\u0131 d\u00fc\u015f\u00fcn\u00fcn ki, bu yuma\u011f\u0131n ortas\u0131ndan, ba\u015f\u0131ndan sonundan bir yerleri ayn\u0131 anda a\u00e7\u0131ls\u0131n, sonra yine intizam bozulmadan sar\u0131ls\u0131n bu m\u00fcmk\u00fcn m\u00fc? \u0130\u015fte bu imkans\u0131z gibi g\u00f6r\u00fcnen olay her an, her canl\u0131n\u0131n her h\u00fccresinde hatas\u0131z, kusursuz, m\u00fckemmel bir \u015fekilde \u00fcstelik cans\u0131z atomlar, molek\u00fcller elleriyle yapt\u0131r\u0131l\u0131yor.<\/p>\n","protected":false},"excerpt":{"rendered":"
DNA molek\u00fcl\u00fcn\u00fcn bir b\u00f6l\u00fcm\u00fc olan her bir \u2018gen\u2019 insan v\u00fcc\u00fcd\u00fcndaki belli bir \u00f6zelli\u011fi kontrol eder. Canl\u0131n\u0131n v\u00fccut \u015fekli, her organ\u0131na ait i\u015f b\u00f6l\u00fcm\u00fc ve bu organlar\u0131n \u00e7al\u0131\u015fma d\u00fczenleri, h\u00fccre i\u00e7inde \u00fcretilmesi gereken proteinlerin genetik kodlar\u0131, \u00fcretilecek proteinlerin miktar kontrolleri (gen reg\u00fclasyonu) gibi canl\u0131n\u0131n hayat\u0131n\u0131 devam ettirmesi i\u00e7in gereken \u015feyler DNA \u00fczerinde planlanm\u0131\u015f, kodlanm\u0131\u015ft\u0131r. DNA\u2019n\u0131n h\u00fccredeki …<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1407,1403],"tags":[8616,6509,8617],"class_list":["post-3774","post","type-post","status-publish","format-standard","hentry","category-fen-ve-teknoloji-odevleri","category-odevler","tag-dnanin-vazifesi-ve-onemi-nedir","tag-histon","tag-messenger-ribonukleik-asit"],"_links":{"self":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/3774","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/comments?post=3774"}],"version-history":[{"count":0,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/posts\/3774\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/media?parent=3774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/categories?post=3774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.islamidavet.com\/kutuphane\/wp-json\/wp\/v2\/tags?post=3774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}