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Câu hỏi:
All of the following may be components of a virus EXCEPT....................
- A. plant cells
- B. carbohydrates
- C. a coat of protein
- D. RNA
Lời giải tham khảo:
Đáp án đúng: A
Kiến thức đọc hiểu:
Tất cả những điều sau đây có thể là thành phần của vi-rút NGOẠI TRỪ
A. tế bào thực vật B. cacbohydrat C. một lớp ngoài của protein D. ARN
Dẫn chứng: Viruses are very simple pieces of organic material composed only of nucleic acid, either DNA or RNA, enclosed in a coat of protein made up of simple structural units (Some viruses also contain carbohydrates and lipids.)
Không giống như vi khuẩn, chúng không phải là tác nhân sống, theo nghĩa chặt chẽ nhất, vi rút là những mảnh vật chất hữu cơ rất đơn giản chỉ bao gồm axit nucleic, DNA hoặc RNA, được bao bọc trong một lớp ngoài protein được tạo thành từ các đơn vị cấu trúc đơn giản. (Một số vi rút cũng chưa carbohydrate và lipid.)
Chọn đáp án A
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