
TMV is a
(a) Helical virus
(b) Polyhedral virus
(c) Spherical virus
(d) Binal virus
Answer
402.9k+ views
Hint: TMV is known as tobacco mosaic virus which is the first discovered virus based on its structure. It is made up of single-strand RNA and is surrounded by capsid which is made up of protein and it is rod-shaped with a helical arrangement.
Complete Answer:
The tobacco mosaic virus or TMV was first crystallised by Wendell Meredith Stanley in 1935. Tobacco mosaic viruses occur in rod-like elongated form and it is a helical virus. It consists of a single-stranded RNA nucleoid and the nucleoid is covered by a protein coat capsid which is made up of a capsomeres subunit due to this it comes under the class Ribohelica. Its common hosts are tobacco, tomato and other solanaceous plants.
Additional Information:
Due to the tobacco mosaic virus, the symptoms that arise are mosaic, moulting, necrosis, stunning, leaf curling, and yellowing of plant leaves. It also causes poor yielding, delay ripening of fruit and uneven fruit colour, especially in tomatoes.
It gets transmitted from an infected plant to a healthy plant or from one plant part to another plant by direct contact or indirectly by contaminated tools and infected plant seeds. Internally the transmission takes place through xylem and phloem and from cell to cell by replication and it infected the whole plant from root to tip.
So, the correct answer is 'Helical virus'.
Note:
The unique property of the tobacco mosaic virus is that it does not die with the host plant therefore when a new plant is planted in the soil containing debris of the infected plant the new plant also gets infected. It also survives at extremely high temperatures, therefore, it is hard to control this virus once it starts infecting the plant.
Complete Answer:
The tobacco mosaic virus or TMV was first crystallised by Wendell Meredith Stanley in 1935. Tobacco mosaic viruses occur in rod-like elongated form and it is a helical virus. It consists of a single-stranded RNA nucleoid and the nucleoid is covered by a protein coat capsid which is made up of a capsomeres subunit due to this it comes under the class Ribohelica. Its common hosts are tobacco, tomato and other solanaceous plants.

Additional Information:
Due to the tobacco mosaic virus, the symptoms that arise are mosaic, moulting, necrosis, stunning, leaf curling, and yellowing of plant leaves. It also causes poor yielding, delay ripening of fruit and uneven fruit colour, especially in tomatoes.
It gets transmitted from an infected plant to a healthy plant or from one plant part to another plant by direct contact or indirectly by contaminated tools and infected plant seeds. Internally the transmission takes place through xylem and phloem and from cell to cell by replication and it infected the whole plant from root to tip.
So, the correct answer is 'Helical virus'.
Note:
The unique property of the tobacco mosaic virus is that it does not die with the host plant therefore when a new plant is planted in the soil containing debris of the infected plant the new plant also gets infected. It also survives at extremely high temperatures, therefore, it is hard to control this virus once it starts infecting the plant.
Recently Updated Pages
The correct geometry and hybridization for XeF4 are class 11 chemistry CBSE

Water softening by Clarks process uses ACalcium bicarbonate class 11 chemistry CBSE

With reference to graphite and diamond which of the class 11 chemistry CBSE

A certain household has consumed 250 units of energy class 11 physics CBSE

The lightest metal known is A beryllium B lithium C class 11 chemistry CBSE

What is the formula mass of the iodine molecule class 11 chemistry CBSE

Trending doubts
Why was the Vernacular Press Act passed by British class 11 social science CBSE

Arrange Water ethanol and phenol in increasing order class 11 chemistry CBSE

Name the nuclear plant located in Uttar Pradesh class 11 social science CBSE

What steps did the French revolutionaries take to create class 11 social science CBSE

How did silk routes link the world Explain with three class 11 social science CBSE

What are the various challenges faced by political class 11 social science CBSE
