4.- Dna, genes and function- https://www.youtube.com/watch?v=sf3y83B6GDo

["https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395791/desktop_3bc81e3a-7d18-4029-b1bb-1126c0e73b08.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395811/desktop_03a2d591-770f-4289-aa52-13c7ec31da3a.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395955/desktop_a3338137-b905-4de5-ba29-66df4f74bf7f.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395970/desktop_adfa3086-b22d-4e44-976c-e595176d2410.png","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395975/desktop_3441258d-2a2b-4e9b-97b7-70f6bb99162d.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395979/desktop_f32e3e89-9aa3-4d4d-a9ec-33bfae384260.png","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395984/desktop_3a4c9775-9622-4ff3-bb32-28259015ab19.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395990/desktop_3b266558-b0a3-48f0-8f73-ead5d5dd10c9.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2395997/desktop_7bfc6706-efb0-4971-92a0-0edbe75fe771.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2396003/desktop_45f06165-dabc-4a78-bf84-5b0911b89310.jpeg","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2396011/desktop_672bf123-4725-46f0-96f2-56a35ecd634b.png","https://cdn.goconqr.com/uploads/multiple_choice_question/image/2396015/desktop_05e7fbb7-2a10-4acc-9dd4-6db8335760dd.gif"]