Prepare for NEET with Botany-specific practice questions. Covering all major Botany chapters, this is perfect for your NEET Biology needs.
A scientist discovers a new infectious agent that causes disease in plants. It is smaller than a virus and composed solely of RNA without a protein coat. What is the most likely classification of this agent?
Virus
Prion
Viroid
Lichen
Which of these is a common fungal disease in plants?
Malaria
Tuberculosis
Rust
Typhoid
Which of the following is NOT a fungal disease?
Ringworm
Rust of wheat
Typhoid
Athlete's foot
Which of the following statements accurately describes viroids?
Small, circular, single-stranded RNA molecules without a protein coat
Small, linear, double-stranded DNA molecules enclosed in a protein coat
Small, circular, single-stranded DNA molecules without a protein coat
Small, linear, double-stranded RNA molecules enclosed in a protein coat
Farmers observe characteristic galls on the tobacco plant roots. Which of the following organisms is the most likely cause of this symptom?
Root-knot nematodes
Tobacco mosaic virus
Aphids
Fungal pathogens
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.
Black rust of wheat is caused by a species of the genus
Mucor
Rhizopus
Aspergillus
Puccinia
In plants, mosaic formation, leaf rolling and curling yellowing and vein clearing are the symptoms of
Viral diseases
Bacterial diseases
Protozoan diseases
Fungal diseases
