Read the following passage and mark the letter A, B, C, or D on your answer sheet to Indicate the correct answer to each of the questions from 31 to 35. The term "virus" is derived...

Câu hỏi :

Read the following passage and mark the letter A, B, C, or D on your answer sheet to Indicate the correct answer to each of the questions from 31 to 35.

A. RNA

B. plant cells

C. carbohydrates

D. a coat of protein

* Đáp án

B

* Hướng dẫn giải

Đáp án B

Thông tin trong bài: "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..."

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