C1: 1 đoạn mạch đơn của ADN có thành phần nucleotit là: 100A, 200T, 300G, 400X mạch đơn còn lại của nó sẽ có thành phần nucleotit ntn? C2: 1 đoạn mạch ADN có 5000 nucleotit, Tính chiều dài của phân tử ADN

2 câu trả lời

Đáp án:

A1=T2 =100

           T1=A2=200

         G1=X2=300

          X1=G2 =400

Giải thích các bước giải:

 Câu 1 : 

Ta có A1=T2 =100

           T1=A2=200

         G1=X2=300

          X1=G2 =400

Câu 2: Chiều dài ADN là l=N/2x3.4=8500A

Đáp án:

C1: 100T, 200A, 300X, 400G

C2: L =8500Ao

Giải thích các bước giải:

 C1: Mạch 1: 100A, 200T, 300G, 400X

Mạch 2:100T, 200A, 300X, 400G

Theo nguyên tắc bổ sung: A-T; G-X

C2: N= 5000 nu

=> L = 3,4N/2 =8500Ao

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