Certain infectious particles lack nucleic acids yet cause diseases. Which of the following correctly describes the infectious agent and a disease it causes?

Which one of the following viruses contains both DNA and RNA?

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

Which statement is wrong for viruses?

Plant viruses generally have

Helical contractile sheath occurs in

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

HIV has a protein coat and genetic material

Which part of an animal virus is not reproduced in multiple copies?

Helical contractile sheath occurs in

Influenza virus has