Biology
Biology, 01.08.2021 18:30, Mexicochan

Người ta nuôi cấy một chủng vi khuẩn E. Coli trong môi trường chỉ chứa đồng vị N14 sau đó thu lấy 100 con chuyển sang môi trường mới có chứa đồng vị N15. Giả sử pha lag kéo dài trong 30 phút, thời gian thế hệ là 20 phút và phân tử ADN của E. Coli có chiều dài 10200A0. Sau 4 giờ 50 phút nếu các tế bào đều phân chia bình thường thì: a. Có tối đa bào nhiêu khuẩn lạc được tạo ra?
b. Có bao nhiêu liên kết hóa trị trong các phân tử ADN được tạo thành hoàn toàn từ N15? (Chủng vi khuẩn này không có Plasmit).

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Người ta nuôi cấy một chủng vi khuẩn E. Coli trong môi trường chỉ chứa đồng vị N14 sau đó thu lấy 10...

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