Tiết 3 điều hoà hoạt động gen đột biến gen

... cần có sự điều hoà hoạt động gen. Hoạt động thầy Hoạt động trò Nội dung- Thế nào là điều hoà hoạt động gen? - Vì sao phải điều hòa hoạt động gen? - Để điều hoà hoạt động của gen, cơ thể sinh ... cấp độ điều hòa hoạt động gen. I. Khái quát về điều hoà hoạt động gen 1. Khái niệm : điều hoà hoạt động gen chính là điều hoà lượng sản phẩmcủa gen được tạo ra, giúp tế bào điều chỉnh sự tổng ... độ điều hoà hoạt động của gen: - Điều hoà phiên mã (điều hoà số lượng mARN được tổng hợp trong tế bào)- Điều hoà dịch mã (điều hoà lượng prôtêin được tạo ra)- Điều hoà sau dịch mã ( làm biến...

... không?Sự điều hòa ở mô hình operon Triptophan có giống như mô hình operon lac không? II. CƠ CHẾ ĐIỀU HÒA HOẠT ĐỘNG GENE I. KHÁI NIỆM•Thế nào là điều hòa hoạt động của gen? •Tại sao gene ... gene lại có sự đều hòa hoạt động? •Các mức độ điều hòa hoạt động của gen? AbsentProtein ức chếKhi môi trường không có mặt của lactose2. Cơ chế điều hòa Gen được điều hòa bởi yếu tố cảm ... tryptophan b. Gen tạo tARN mở đầu và gen tạo tARN kết thúc.c. Gen cấu trúc và gen vận hành.d. Gen điều hòa và gen cấu trúc.Trên phân tử ADN, ngoài các gen mã hóa cấu trúc các prôtêin có các gen làm...

... Khái quát về điều hoà hoạt động gen : gen : Điều hoà hoạt động gen chính là điều hoà lượng Điều hoà hoạt động gen chính là điều hoà lượng sản phẩm của gen tạo ra giúp tế bào điều chỉnh sản ... chế điều hoà hoạt động gọi là Opêron III- CƠ CHẾ ĐIỀU HOÀ HOẠT ĐỘNG CỦA GEN Ở III- CƠ CHẾ ĐIỀU HOÀ HOẠT ĐỘNG CỦA GEN Ở SINH VẬT NHÂN THỰC SINH VẬT NHÂN THỰC Tại sao điều hoà hoạt động ... 4 : ĐỘT BIẾN GEN )mới ( Bài 4 : ĐỘT BIẾN GEN ) 2-Sự điều hoà hoạt động của 2-Sự điều hoà hoạt động của OpêronOpêron A Y Z O P R P Gen điều hoà Opêron Lac Phiên mãGiải mãCác gen cấu...

... Tiết: 5 Bài 3: ĐIỀU HÒA HOẠT ĐỘNG CỦA GEN I. MỤC TIÊU: - HS trình bày được thế nào là điều hòa họat động của gen. - Mô tả, vẽ, trình bày được cơ chế điều hòa hoạt động của operon ... hoạt động của gen mà bài hôm nay chúng ta sẽ tìm hiểu) 3. Bài mới: Nội dung Hoạt động của GV và HSI. Khái quát về điều hòa hoạt động gen: Điếu hòa hoạt động của gen chính là điều hòa lượng ... Vùng khởi động P(promoter) là nơi mà ARN polimeraza bám vào và khởi đầu phiên mã .* Gen điều hòa R : có vai trò quan trọng trong điều hòa hoạt động các gen của operon. Khi gen R hoạt động sẽ...

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3 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... hoạt động khi môi trường có lactôzơ.- Điều hoà hoạt động gen là điều hoà lượng sản phẩm - Điều hoà hoạt động gen là điều hoà lượng sản phẩm của gen. của gen. - Vd: người có khoảng 25000 gen, ... số gen hoạt đông, phần lớn gen ở trạng thái không hoạt động tổng hợp prôtêin vào lúc thích hơp- Điều hòa hoạt động gen: Điều hòa phiên mã, điều hòa dịch mã, sau dịch mã. SV nhân sơ, điều ... (Z, Y, A). D. gen điều hòa (R), vùng vận hành, nhóm gen cấu trúc (Z, Y, A). II. ĐIỀU HÒA HOẠT ĐỘNG CỦA GEN Ở SINH VẬT NHÂN SƠ*Mỗi gen có vùng mã hóa và các vùng điều hòaVùng điều hòaVùng...

... niệm: Điều hòa hoạt động gen chính là điều hòa lượng sản phẩm do gen tạo ra (ARN, protein…). Điều hòa hoạt động gen là gì. Điều hòa hoạt động gen biểu hiện như thế nào.Các mức độ điều ... sự điều hòa hoạt động gen. Cơ thể có rất nhiều gen, các gen không hoạt động đồng thời tất cả, ở mỗi giai đoạn nhất định, có 1 nhóm gen nhất định hoạt động, các nhóm khác không hoặc hoạt động ... Operon được giải phóng, gen hoạt động …Câu 4. Gen điều hòa (R) mang thông tin tổng hợp protein ức chế, qua đó điều hòa hoạt động của operon BÀI 3. ĐIỀU HÒA HOẠT ĐỘNG GEN  Kiểm tra bài cũ....

... protein ức chế…Vùng O của Operon được giải phóng, gen hoạt động …Câu 4. Gen điều hòa (R) mang thông tin tổng hợp protein ức chế, qua đó điều hòa hoạt động của operon ... tập.Câu 1. Điều hòa sản phẩm (ARN, Pr…) qua các quá trình (phiên mã…)Câu 2.SGK Câu 3. Môi trường không có cơ chất (lactozơ), gen không hoạt động Môi trường có cơ chất (lactozơ), làm biến tính ... 2. Sự điều hòa hoạt động của operon Lac.pOZ YA. . .. . .RpPhiên mãDịch mãProtein ức chế...

... Y A Gen điều hoOpêron LacR P 0 Z Y A Gen điều hoOpêron Lac...

... hoạt động gen là điều hoà lượng sản phẩm - Điều hoà hoạt động gen là điều hoà lượng sản phẩm của gen. của gen. - Vd: người có khoảng 25000 gen, chỉ có 1 số gen hoạt đông, phần lớn gen ở trạng ... lactôzơ2. Sự điều hòa hoạt động của opêron LacOPrôtêin ức chếZ Y AKhông hoạt động ADN Gen điều hòaProtein ức chếVùng vận hànhNgăn phiên mã Gen cấu trúc không họat động gắn vàoCâu 3. Thành ... thái không hoạt động tổng hợp prôtêin vào lúc thích hơp- Điều hòa hoạt động gen: Điều hòa phiên mã, điều hòa dịch mã, sau dịch mã. SV nhân sơ, điều hòa chủ yếu là phiên mã.BÀI 3 ...