
Kiểm Tra Cuối Kỳ I KHTN 9
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Medium
thibinh n
Used 2+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Đơn phân cấu tạo DNA có kí hiệu là:
A, U, G, C.
A, T, G, C.
A, U, G, T.
U,T,G, C.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kí hiệu của phân tử RNA thông tin là:
mRNA.
rRNA.
tRNA.
RNA.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1 mạch của gene có trình tự như sau: 3'…T A C G…5'
Trình tự các nucleotide trong mạch còn lại của gene?
5'…A U G C...3'
5'…A T G C...3'
3'…A U G C...5'
3'…A U G C ...5'
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1 đoạn DNA có tổng 1000 nu. Số nu loại A chiếm 20%. Số nu mỗi loại của gene là:
A = T = 300,
G = C = 200
A = U = 300,
G = C = 200
A = T = 200,
G = C = 300
A = U = 200,
G = C = 300
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1 đoạn DNA có tổng 2400 nu. Số nu loại A là 600. Số liên kết hydrogen của gene là:
2400
3000
18000
600
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Mối quan hệ giữa gene và tính trạng được biểu hiện qua sơ đồ:
DNA → tRNA → Polypeptide → protein → Tính trạng.
DNA → mRNA → tRNA → protein → Tính trạng.
DNA → mRNA → Polypeptide → protein → Tính trạng.
DNA → mRNA → tRNA → Polypeptide → Tính trạng.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cặp nucleotide nào sau đây không có liên kết hydrogene theo nguyên tắc bổ sung?
A - T.
T - A.
A - U.
G - C.
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