Một chu kì hoạt động của bơm natri-kali cần tiêu tốn mấy phân tử ATP?
A.3
B.0
C.2
D.1

Cho mô tả ngắn gọn về một quá trình như sau:
"- Hình thành bóng xuất bào chứa chất thải
- Các bóng liên kết với màng sau đó màng biến đổi bài xuất chất thải ra ngoài màng tế bào."Đây là quá trình gì?
A.Ẩm bào.
B.Vận chuyển chủ động.
C.Xuất bào.
D.Thực bào.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
You should keep your pens, pencils and other writing materials in a ……….
A.lighthouse
B.solar charger
C.pencil case
D.notebook

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The discovery of oil brought many ………. to the town.
A.needs
B.benefits
C.achievements
D.demands

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
He is very ………. - he often buys things for other people.
A.passionate
B.friendly
C.fortunate
D.generous

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
It is more ………. to travel by plane than by train.
A.economical
B.independent
C.expensive
D.fortunate

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I think syringe is the greatest ………. in medicine.
A.development
B.invention
C.discovery
D.creation

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The boxes were ………. and difficult to move.
A.bulky
B.light
C.portable
D.small

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
There are thousands of free ………. on the Internet.
A.hardcovers
B.e-books
C.paperbacks
D.printed books

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A motorbike is often more ………. than a car in towns.
A.versatile
B.convenient
C.technological
D.expensive