Biological Classification questions
676 published questions with worked solutions.
- Which of the following plant virus has DNA in it?
- Who crystallised and isolated viruses for the first time?
- Which of the following statements are false about viruses? I. Viruses are facultative parasites II. Viruses can multiply only...
- The benefit of algae in lichen is
- In plants, mosaic formation, leaf rolling and curling, yellowing and vein clearing are the symptoms of
- I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco II. MW Beijerinck (1898)...
- The genetic material of viruses consists of
- Viruses and viroids are the non-cellular organisms, which are not characterised in the classification of
- *Contagium vivum fluidum* concept of virus was proposed by
- Which of the following phenomenon proves that viruses are living?
- Tobacco mosaic virus is
- Difference between virus and viroid is
- Common cold is a
- Analyse the following statements and identify the correct option given below. I. Viruses that infect plants have single-stranded...
- Viruses are also known as
- A new infectious agent that is smaller than virus is
- The fungal partner in lichen is called mycobiont whereas algal partner is called
- All are the viral diseases except
- Viroids were discovered by
- Match the following columns. List-I: (A) DJ Ivanowsky (1892) (B) MW Beijerinck (1898) (C) WM Stanley (1935) (D) TO Diener (1971)...
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