Mosaic disease in tobacco is due to
Bacteria
Virus
Mycoplasma
Algae
Related Questions
Viroids are infectious agents that affect plants. Which of the following statements about their structure is FALSE?
They consist of circular, single-stranded RNA.
They lack a protein coat.
Their RNA codes for proteins.
They are smaller than viruses.
Common cold is a
Bacterial disease
Viral disease
Protozoan disease
Fungal disease
A teacher was explaining about a constant physical contact involving almost equal physiological interdependence in two different thalloid forms. He was trying to explain
Mycorrhizal association
Establishment of heterothallism
Operation of heterothallism
Advent of lichen formation
Which of the following is NOT a characteristic of viroids?
Circular single-stranded RNA
Smaller than viruses
Infectious in plants
Presence of a protein coat
The fungal partner in lichen is called mycobiont whereas algal partner is called
Glycobiont
Algobiont
Phycobiont
Often referred as algal partner
Which statement about the structure of viroids is FALSE?
They are composed of double-stranded RNA.
They lack a protein coat.
They have a circular RNA molecule.
They are smaller than viruses.
Which of the following are the indicators of pollution?
Lichen
Fungi
Algae
None of these
Which of the following statements is INCORRECT regarding prions?
They are resistant to proteases.
They cause neurodegenerative diseases.
They are easily destroyed by standard sterilization techniques.
They can exist in multiple conformational states.
How do viroids differ from viruses in their structural composition?
Viroids have DNA, while viruses have RNA.
Viroids have a protein coat, while viruses do not.
Viroids lack a protein coat, while viruses have a protein capsid.
Both viroids and viruses have a protein capsid.
Term ‘virus’ means
Cellular
Pathogen
Parasite
Venom or poisonous fluid
