{"id":2205,"date":"2024-02-26T11:52:39","date_gmt":"2024-02-26T11:52:39","guid":{"rendered":"https:\/\/dasgeniaal.be\/?p=2205"},"modified":"2024-02-26T11:52:40","modified_gmt":"2024-02-26T11:52:40","slug":"%f0%9f%a7%ac-extraire-ladn-dune-banane-%f0%9f%8d%8c-%f0%9f%8d%8c-%f0%9f%8d%8c-apprenez-avec-hasnae","status":"publish","type":"post","link":"https:\/\/dasgeniaal.be\/fr\/challenges-fr\/%f0%9f%a7%ac-extraire-ladn-dune-banane-%f0%9f%8d%8c-%f0%9f%8d%8c-%f0%9f%8d%8c-apprenez-avec-hasnae\/","title":{"rendered":"\ud83e\uddec Extraire l&#8217;ADN d&#8217;une banane \ud83c\udf4c \ud83c\udf4c \ud83c\udf4c ? Apprenez avec Hasnae !"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Challenge<\/h2>\n\n\n\n<p class=\"has-large-font-size wp-block-paragraph\"><strong>De quoi avez-vous besoin?<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>2 Gobelets en plastique<\/li><li>Alcool tr\u00e8s froid (placez-le au cong\u00e9lateur avant l&#8217;exp\u00e9rience)<ul><li>Id\u00e9alement, utilisez de l&#8217;alcool le plus pur possible, par exemple de Delhaize (94%) ou fonctionne \u00e9galement avec de l&#8217;alcool d\u00e9sinfectant (70%), mais pas avec de la vodka (40%) &#8211; voir figure 1<\/li><\/ul><\/li><li>Filtre \u00e0 caf\u00e9<\/li><li>Eau (du robinet)<\/li><li>Sel (sel de cuisine)<\/li><li>Savon (Dreft)<\/li><li>Fruit (exp\u00e9rimentez avec une banane, mais fonctionne aussi avec kiwi ou fraise)<\/li><li>Fourchette et cuill\u00e8re \u00e0 soupe<\/li><li>Verre mesureur<\/li><\/ul>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"alignright size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-683x1024.jpg\" alt=\"\" class=\"wp-image-2207\" width=\"339\" height=\"508\" srcset=\"https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-683x1024.jpg 683w, https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-200x300.jpg 200w, https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-768x1152.jpg 768w, https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-1024x1536.jpg 1024w, https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-1365x2048.jpg 1365w, https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-8x12.jpg 8w, https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/ALL-116-1-scaled.jpg 1707w\" sizes=\"auto, (max-width: 339px) 100vw, 339px\" \/><\/figure><\/div>\n\n\n\n<h3 class=\"has-large-font-size wp-block-heading\">Ce qu&#8217;il faut faire.<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u00c9tape 1 : Pr\u00e9parer la solution d&#8217;extraction<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Mettez 1 cuill\u00e8re \u00e0 soupe de sel dans un gobelet en plastique<\/li><li>Ajoutez 100 ml d&#8217;eau (chaude)<\/li><li>M\u00e9langez bien en remuant jusqu&#8217;\u00e0 ce que tout le sel soit dissous.<\/li><li>Ajoutez ensuite 10 ml de savon (environ 10 pompes).<\/li><li>M\u00e9langez bien en remuant.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u00c9tape 2 : Pr\u00e9parer la pulpe<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Prenez une banane pel\u00e9e et \u00e9crasez-la avec une fourchette jusqu&#8217;\u00e0 obtenir une pulpe.<\/li><li>Transf\u00e9rez la pulpe de banane dans un gobelet et m\u00e9langez-la avec 5 cuill\u00e8res \u00e0 soupe de la solution d&#8217;extraction + 100 mL d&#8217;eau<\/li><li>(\u00e9tape 2b): Extraction de l&#8217;ADN =&gt; cette \u00e9tape peut \u00eatre saut\u00e9e, mais il est alors recommand\u00e9 d&#8217;utiliser de l&#8217;eau chaude \u00e0 l&#8217;\u00e9tape 1.<\/li><li>Remuez un peu en agitant et placez le gobelet pendant 15 minutes dans un bain-marie \u00e0 environ 60 \u00b0C.<\/li><li>Remuez de temps en temps.<\/li><li>Refroidissez le gobelet pendant 5 minutes dans de l&#8217;eau tr\u00e8s froide, en remuant \u00e9galement de temps en temps.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>\u00c9tape 3 : Filtration<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Placez le filtre \u00e0 caf\u00e9 dans un nouveau gobelet en plastique<\/li><li>Filtrez ensuite la solution d&#8217;extraction \u00e0 travers le filtre \u00e0 caf\u00e9<\/li><li>Remuez doucement dans l&#8217;extrait de temps en temps pour aider \u00e0 la filtration.<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Pr\u00e9cipitation de l&#8217;ADN<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Versez d\u00e9licatement (le long du c\u00f4t\u00e9 du verre) environ la m\u00eame quantit\u00e9 d&#8217;alcool que de filtrat dans le gobelet (50 mL chacun)<\/li><li>Laissez reposer pendant 5 minutes dans l&#8217;eau tr\u00e8s froide, l&#8217;ADN devrait maintenant \u00eatre visible sous forme de masse blanche flottante.<\/li><\/ul>\n<div class=\"clearfix\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Challenge De quoi avez-vous besoin? 2 Gobelets en plastique Alcool tr\u00e8s froid (placez-le au cong\u00e9lateur&#8230;<\/p>","protected":false},"author":1,"featured_media":2208,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"video","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"spay_email":"","footnotes":""},"categories":[18],"tags":[],"class_list":["post-2205","post","type-post","status-publish","format-video","has-post-thumbnail","hentry","category-challenges-fr","post_format-post-format-video"],"jetpack_featured_media_url":"https:\/\/dasgeniaal.be\/wp-content\/uploads\/2024\/02\/Scherm\u00adafbeelding-2024-02-26-om-12.25.24-e1771499112300.png","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\ud83e\uddec Extraire l&#039;ADN d&#039;une banane \ud83c\udf4c \ud83c\udf4c \ud83c\udf4c ? 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