The algal partner in a lichen is known as:

Single stranded nucleic acid is found in

RNA is not found in one of the following organisms

I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco

II. MW Beijerinck (1898) demonstrated that the extract of infected plants of tobacco could cause infection in healthy plants and called the fluid as contagium vivum fluidum

III. WM Stanley (1935) showed that these microbes could be crystallised and crystals consist largely of protein

The above statements are assigned to

A virus differs from a bacterium as it contains

Virus envelope is known as

Viruses are also known as

Which of the following features is essential for the protein synthesis machinery of a viroid?

The abnormal folding of which cellular protein is associated with prion diseases?

I. DJ Ivanowsky (1892) recognised certain microbes as causal organisms of the mosaic disease of tobacco

II. MW Beijerinck (1898) demonstrated that the extract of infected plants of tobacco could cause infection in healthy plants and called the fluid as contagium vivum fluidum

III. WM Stanley (1935) showed that these microbes could be crystallised and crystals consist largely of protein

The above statements are assigned to

In plants, mosaic formation, leaf rolling and curling yellowing and vein clearing are the symptoms of