Question

Caulimovirus (Cauliflower mosaic virus) is a group of viruses which have
(A)Double-stranded RNA
(B)Single-stranded RNA
(C)Single-stranded DNA
(D)Double-stranded DNA

Answer 1

Hint: Caulimovirus (Cauliflower mosaic virus) is a group of viruses that have a molecule composed of two polynucleotide chains that coil around each other carrying genetic instructions of all known organisms and many viruses.

Complete answer:
Caulimovirus (Cauliflower mosaic virus) is a group of viruses which have Double-stranded DNA. The two polynucleotide chains which are seen in DNA coil around each other to form a double helix which is carrying the genetic instructions for many purposes like for the development, the functioning of the cells of the organism, growth, and reproduction of all known organisms and many viruses.

Additional Information: The CaMV i,e Cauliflower mosaic virus is a member of the genus Caulimovirus, which is one among the six genera within the family Caulimoviridae, which are the viruses that infect plants. These viruses replicate through reverse transcription a bit like retroviruses, but the viral particles contain DNA rather than RNA. Mostly plants of the Cruciferae family which includes plants such as cauliflower and turnip) are infected by CaMV but some CaMV strains (D4 and W260) also are ready to infect Solanaceae species of the genera, namely the Datura and Nicotiana. It was seen that the CaMV mostly induces a spread of systemic symptoms which includes manly like mosaic, necrotic lesions on leaf surfaces, stunted growth, and deformation of the general plant part. The symptoms exhibited vary counting on the viral strain, host ecotype, and environmental conditions. CaMV is transmitted during a non-circulatory manner by aphid species like Myzus persicae. Once these are introduced within a plant host cell, virions migrate to the nuclear envelope of the plant cell.
So, the correct answer is ‘Double-stranded DNA’.

Note: The particle of CaMV is found to be an icosahedron with a diameter of approx 51 nm built from 420 capsid protein (CP) subunits arranged with a triangulation T = 7, which surrounds a solvent-filled central cavity.