Cotton leaf curl disease is caused by a complex of ……….
a) prions
b) begomovirus
c) viriods
d) TMV
Explanation: Cotton leaf curl disease (CLCuD) is a viral infection of cotton and other susceptible host plants that is transmitted by silverleaf whitefly (Bemisia tabaci)
Which of the following transmits leaf curl
disease of cotton virus?
a) tsetse fly
b) butterfly
c) white fly
d) house fly
Explanation: Bemisia tabaci
The first symptoms of leaf curl disease infection in cotton appear within……..
a) 3-5 days
b) 2-3 weeks
c) 1-2 months
d) 3 weeks to 2 months
Which of the following is/are infectious protein particles thought to be responsible for a group of transmissible neurodegenerative diseases?
a) prions
b) viroids
c) HBV
d) all of these
Prions are infectious ……..
a) DNA
b) RNA
c) proteins
d) all of these
In Scrapie the central nervous system of
……..is affected.
a) sheep
b) goats
c) human and apes
d) both a and b
Explanation: mainly transmitted due to unhygienic way of feeding
