Question

Who discovered the virus?
A. Miller
B. Ivanovsky
C. Herelle
D. Mendel

Answer 1

Hint: Virology is the study of viruses. They are infectious. The first study was done on the diseased tobacco plant. A virus has a character of taking up the functionality of its host. They were smaller than the bacterias.

Complete answer:
In the late 19th century, Edward Jenner and Louis Pasteur developed their first vaccine despite knowing the existence of the viruses. Then, Dmitri Ivanovsky noticed that some filters had small pores to retain bacteria. So when the sap from a diseased tobacco plant was filtered, the plant still had that disease. This confirmed that there were some smaller microorganisms other than bacterias.
Martinus Beijerinick then named this infectious substance to be a virus, hence this was the beginning of virology (the study of viruses).

Let us see the discoveries done by the scientists in the options.
> Option A: Miller - Jacques Miller was a French scientist who is known for the discovery of the thymus. He studied the two major subsets of the lymphocytes and functions
> Option B: Ivanovsky - Dmitri IVanovsky was a microbiologist who is known for the discovery of the virus from the tobacco mosaic disease in the tobacco plant.
> Option C:Herelle - Felix d’ Herelle is known for the discovery of the bacteriophage. It is a virus-infected bacteria. He experimented with phage therapy. He had his contributions to the applied microbiology.
> Option D: Mendel - Gregor Mendel is widely known for his discovery of the fundamental laws of Inheritance. He stated that the genes are inherited from the parents as distinct units. He tracked the segregation of parental genes and learnt the recessive and dominant traits.

So the answer is option B: Ivonovsky

Note: Discovery is the act of finding something unique. Some of the greatest inventions of all times include the discovery of the Electricity, Penicillin, Genome editing, RNA sequencing, Molecular structure of DNA, vaccines etc. These were the ones which caused the revolution in the field of biology. They opened the pathways for the discoveries