{"id":35258,"date":"2025-09-02T19:48:55","date_gmt":"2025-09-02T16:48:55","guid":{"rendered":"https:\/\/kibrisayna.com\/index.php\/2025\/09\/02\/bilim-insanlari-yasamin-sirrini-cozmeyi-basardi-son-dakika-teknoloji-haberleri\/"},"modified":"2025-09-02T19:48:55","modified_gmt":"2025-09-02T16:48:55","slug":"bilim-insanlari-yasamin-sirrini-cozmeyi-basardi-son-dakika-teknoloji-haberleri","status":"publish","type":"post","link":"https:\/\/kibrisayna.com\/index.php\/2025\/09\/02\/bilim-insanlari-yasamin-sirrini-cozmeyi-basardi-son-dakika-teknoloji-haberleri\/","title":{"rendered":"Bilim insanlar\u0131 ya\u015fam\u0131n\u00a0s\u0131rr\u0131n\u0131 \u00e7\u00f6zmeyi ba\u015fard\u0131 &#8211; Son Dakika Teknoloji Haberleri"},"content":{"rendered":"<p> <br \/>\n<\/p>\n<div>\n<p><a href=\"https:\/\/www.ntv.com.tr\/bilim\" target=\"_blank\" rel=\"tag\">Bilim<\/a> insanlar\u0131, biyolojinin en b\u00fcy\u00fck gizemlerinden birine dair \u00f6nemli bir ipucu yakalad\u0131: Ya\u015fam\u0131n yap\u0131 ta\u015flar\u0131 ilk organizmalar\u0131 nas\u0131l ortaya \u00e7\u0131kard\u0131?<\/p>\n<p>Hakemli bilimsel dergi Nature\u2019da yay\u0131nlanan yeni bir ara\u015ft\u0131rmaya g\u00f6re, RNA molek\u00fclleri ve amino asitler tamamen rastlant\u0131sal etkile\u015fimlerle birle\u015ferek proteinleri olu\u015fturabiliyor.<\/p>\n<p>Proteinler, h\u00fccredeki neredeyse t\u00fcm i\u015flevleri yerine getiren ve ya\u015fam i\u00e7in vazge\u00e7ilmez molek\u00fcller.<\/p>\n<p><strong>TAVUK MU YUMURTADAN, YUMURTA MI TAVUKTAN?<\/strong><\/p>\n<p>Normalde proteinler, h\u00fccre i\u00e7indeki karma\u015f\u0131k bir mekanizma olan ribozomlarda, RNA\u2019n\u0131n talimatlar\u0131yla sentezleniyor. Bu da bir paradoks yarat\u0131yor: H\u00fccreler proteinsiz var olamaz, fakat proteinler de h\u00fccre olmadan \u00fcretilemez. \u00d6yleyse ilk ya\u015fam formlar\u0131 nas\u0131l ortaya \u00e7\u0131kt\u0131?<\/p>\n<p>Yeni \u00e7al\u0131\u015fma, bu ikilemin nas\u0131l a\u015f\u0131lm\u0131\u015f olabilece\u011fine dair \u00f6nemli bir ipucu sunuyor.<\/p>\n<p>Ara\u015ft\u0131rma ekibinden University College London kimyageri Matthew Powner, \u201cN\u00f6tr pH\u2019taki basit su kimyas\u0131yla amino asitleri RNA\u2019ya ba\u011flamay\u0131 ba\u015fard\u0131k. Bu kimya kendili\u011finden ger\u00e7ekle\u015fiyor, se\u00e7ici ve D\u00fcnya\u2019n\u0131n ilk zamanlar\u0131nda ortaya \u00e7\u0131km\u0131\u015f olabilir\u201d dedi.<\/p>\n<p>Powner\u2019a g\u00f6re bulgular, \u201cRNA\u2019n\u0131n protein sentezini ilk kez nas\u0131l kontrol etmeye ba\u015flam\u0131\u015f olabilece\u011fini\u201d g\u00f6steriyor.<\/p>\n<p><strong>D\u00dcNYA\u2019NIN \u0130LK G\u00dcNLER\u0130<\/strong><\/p>\n<p>Bilim insanlar\u0131, metabolizman\u0131n temel bile\u015fenlerinden biri olan pantethein molek\u00fcl\u00fcne odakland\u0131. \u00d6nceki \u00e7al\u0131\u015fmalara g\u00f6re bu bile\u015fik, erken D\u00fcnya\u2019daki g\u00f6llerde bolca bulunuyordu.<\/p>\n<p>Ekip, pantethein ve amino asitleri su i\u00e7inde bir araya getirdi\u011finde, amino asitler bu bile\u015fikle tepkimeye girerek aminoasil-tiol ad\u0131 verilen ba\u015fka bir madde olu\u015fturdu. Bu madde de serbest RNA ile birle\u015ferek amino asitleri RNA\u2019ya aktard\u0131 ve b\u00f6ylece zincirler olu\u015fmaya ba\u015flad\u0131.<\/p>\n<p>Powner, Washington Post\u2019a yapt\u0131\u011f\u0131 a\u00e7\u0131klamada, \u201cE\u011fer elinizde amino asitler, RNA ve k\u00fck\u00fcrt i\u00e7eren tiol molek\u00fclleri varsa, bu t\u00fcr bir s\u00fcrecin ger\u00e7ekle\u015fmesi neredeyse ka\u00e7\u0131n\u0131lmaz\u201d dedi.<\/p>\n<p><strong>OKYANUS DE\u011e\u0130L, G\u00d6LLER<\/strong><\/p>\n<p>Ara\u015ft\u0131rmac\u0131lar, pantethein\u2019in erken D\u00fcnya\u2019n\u0131n okyanuslar\u0131nda yeterli yo\u011funlu\u011fa ula\u015famayaca\u011f\u0131n\u0131, ancak k\u00fc\u00e7\u00fck tatl\u0131 su g\u00f6llerinde bu s\u00fcrecin daha olas\u0131 oldu\u011funu belirtiyor.<\/p>\n<p>\u00c7al\u0131\u015fmaya dahil olmayan uzman Nick Lane ise Science dergisine yapt\u0131\u011f\u0131 a\u00e7\u0131klamada, ortaya \u00e7\u0131kan amino asit zincirlerinin ribozomlar\u0131n \u00fcretti\u011fi d\u00fczenli proteinler gibi olmad\u0131\u011f\u0131n\u0131, olduk\u00e7a rastgele ve kaotik oldu\u011funu vurgulad\u0131. Lane, \u201cO sorun h\u00e2l\u00e2 \u00e7\u00f6z\u00fclm\u00fc\u015f de\u011fil\u201d dedi.<\/p>\n<p>Yine de bilim insanlar\u0131, milyarlarca y\u0131l boyunca bu t\u00fcr kimyasal s\u00fcre\u00e7lerin tekrarlanmas\u0131n\u0131n, ya\u015fam\u0131n temelini atm\u0131\u015f olabilece\u011fini d\u00fc\u015f\u00fcn\u00fcyor.<\/p>\n<\/div>\n<p><br \/>\n<br \/><a href=\"https:\/\/www.ntv.com.tr\/teknoloji\/bilim-insanlari-yasaminsirrini-cozmeyi-basardi,uXvfy-9_j0yNEDPX05_WKQ\"><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Bilim insanlar\u0131, biyolojinin en b\u00fcy\u00fck gizemlerinden birine dair \u00f6nemli bir ipucu yakalad\u0131: Ya\u015fam\u0131n yap\u0131 ta\u015flar\u0131 ilk organizmalar\u0131 nas\u0131l ortaya \u00e7\u0131kard\u0131? Hakemli bilimsel dergi Nature\u2019da yay\u0131nlanan yeni bir ara\u015ft\u0131rmaya g\u00f6re, RNA molek\u00fclleri ve amino asitler tamamen rastlant\u0131sal etkile\u015fimlerle birle\u015ferek proteinleri olu\u015fturabiliyor. Proteinler, h\u00fccredeki neredeyse t\u00fcm i\u015flevleri yerine getiren ve ya\u015fam i\u00e7in vazge\u00e7ilmez molek\u00fcller. TAVUK MU YUMURTADAN, [&hellip;]<\/p>\n","protected":false},"author":908,"featured_media":35259,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[12],"tags":[],"class_list":["post-35258","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-teknoloji"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/kibrisayna.com\/wp-content\/uploads\/2025\/09\/N2Fw93BhaEqGpSs316t1iQ.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/posts\/35258","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/users\/908"}],"replies":[{"embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/comments?post=35258"}],"version-history":[{"count":0,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/posts\/35258\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/media\/35259"}],"wp:attachment":[{"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/media?parent=35258"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/categories?post=35258"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kibrisayna.com\/index.php\/wp-json\/wp\/v2\/tags?post=35258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}