Cho các thông tin sau: (1) Gen bị đột biến dẫn đến prôtêin không được tổng hợp. (2) Gen bị đột biến làm tăng hoặc giảm số lượng prôtêin. (3) Gen đột biến làm thay đổi một axit amin này bằng một axit amin khác nhưng không làm thay đổi chức năng của prôtêin. (4) Gen bị đột biến dẫn đến prôtêin được tổng hợp bị mất chức năng. Trong các thông tin trên, những thông tin được sử dụng làm căn cứ để giải thích nguyên nhân của các bệnh di truyền phân tử ở người là

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Read the passage and choose the correct answer:
  Last year I went to Nepal for three months to work in a hospital. I think it's important to see as much of a country as you can, but it is difficult to travel around Nepal. The hospital let me have a few days’ holiday, so I decided to go into the jungle and I asked a Nepalese guide, Kamal Rai, to go with me.
  We started preparing for the trip at six in the morning, and left camp with two elephants carrying our equipment. It was hot but Kamal made me wear shoes and trousers to protect me from snakes. In the jungle there was a lot of wildlife, but we were trying to find big cats, especially tigers. We climbed onto the elephants' backs to get better view, but it is unusual to find tigers in the afternoon because they sleep in the heat of the day.
  Then, in the distance, we saw a tiger, and Kamal told me to be very quiet. We crept nearer and found a dead deer, still bleeding. This was the tiger's lunch! Suddenly I started to feel very frightened.
  We heard the tiger a second before we saw it. It jumped out like a flash of lightning, five hundred kilos plus and four meters long. I looked into its eyes and face, and saw right down the animal's throat. It grabbed Kamal's leg between its teeth, but I managed to pull Kamal away. One of our elephants ran at the tiger and made it go back into the grass, so we quickly escaped to let the tiger eat its lunch. That night it was impossible to sleep!
  Question. Kamal made his escape when . . . . . . . . . . . . . . . . . . . . . . . . . . .
  

• Swimming produces both ________ and physical benefits.

• Trong tổng GDP của thế giới vào năm 2004, tỉ trọng của EU chiếm
  

• "Have you received the shipment of bicycles yet?".
  "No, but it's possible that it_____ in a few days"

• Had you told me that this was going to happen, I_____ it.

• Giai đoạn đầu của xã hội cộng sản chủ nghĩa được gọi là gì?
  
• Ưu thế lớn nhất của việc áp dụng công nghệ thông tin là
  
• Vua Gia Long đã chia đất nước thành
  

• Cho hàm số có đạo hàm , . Mệnh đề nào sau đây là đúng?         

• Nguồn thức ăn tự nhiên của chăn nuôi là