NEET Biology question
Read the following statements and select the option which identifies the incorrect ones. (i) Potato spindle tuber disease is caused by viroids. (ii) Viruses are obligate parasites. (iii) Retroviruses have two copies of ssRNA. (iv) Capsomeres are arranged in rounded form.
Answer: (D)
Solution
Statements (i), (ii) and (iii) are all correct: potato spindle tuber disease is indeed viroid-caused, viruses are obligate parasites, and retroviruses (like HIV) carry two copies of single-stranded RNA.
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