List of top Plant Sciences Questions asked in ICAR AIEEA (PG)

Powdery mildew diseases of crop plants are incited by
(A) Fungal Biotrophs

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Polycyclic diseases are known to cause plant disease epidemics.
Reason R: Polycyclic disease inciting pathogens produce multiplicity of infections in short time.
In light of the above statements, choose the correct answer from the options given below

Panama wilt of banana caused by Fusarium oxysporum f. sp. cubense is an internationally known plant disease
A. Gros Michel variety of banana is susceptible to race 1
B. Gros Michel variety of banana is resistant to race 1
C. Cavendish variety of banana is susceptible to race 4
D. Cavendish variety of banana is resistant to race 4
E. Both Gros Michel and Cavendish are susceptible to race 1
Choose the most appropriate answer from the options given below:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Barbery is an alternate host for Puccinia graminis f. sp. tritici.
Reason R: Barbery play key role in rust epidemics in India.
In light of the above statements, choose the correct answer from the options given below

Motile infective propagules are produced by
A. Pythium
B. Phytophthora
C. Xanthomonas
D. Ralstonia
E. Nematodes
Choose the correct answer from the options given below:

Given below are two statements
Statement I: Plant viruses are transmitted by insects.
Statement II: Only sucking insects are capable of transmitting plant viruses.
In light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Foliar plant pathogen produce pigmented and colored spores
Reason R : The dark pigmentation helps the pathogens to adapt on foliar parts to withstand high radiations
In light of the above statements, choose the correct answer from the options given below

Wilt diseases are caused by

Rust diseases are caused by
A. {Puccinia
B. {Albugo
C. {Cephaleuros
D. {Uromyces
E. {Gymnosporangium
Choose the correct answer from the option given below

Plant pathogens can be detected and identified using ELISA and PCR
A. ELISA based detection is more useful for viral pathogen detection than bacterial pathogens
B. Fungal diseases are more amenable for ELISA based detection than plant viruses
C. Bacterial pathogens are more amenable for PCR based detection than plant viruses
D. Bacterial pathogens are more amenable for PCR based detection than fungal pathogens
E. Phytoplasma is more amenable for PCR based detection than ELISA
Choose the most appropriate answer from the options given below:

Given below are two statements
Statement I: True fungi is typically terrestrial-adapted organisms.
Statement II: True fungi possess chitin in the cell wall.
In light of the above statements, choose the most appropriate answer from the options given below

Which of the following plant disease was responsible for environmental disturbances impacting even the wildlife

Light pathway of a typical microscope consists of several items, viz.,
A. Light source to Mirror
B. Field Diaphragm to Condenser
C. Stage to Specimen
D. Objective to Body
E. Ocular to Eye/Camera
Choose the correct answer from the options given below

Which of the following belong to Oomycetes

Rot diseases are caused by

Given below are two statements
Statement I: Horizontal and Vertical Resistance defend crop plants against pathogens
Statement II: Horizontal Resistance is more frequently exploited in resistance breeding programme than Vertical Resistance
In light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements
Statement I: Viruses are the only pathogens transmitted by nematodes
Statement II: Biotic agents associated with plants are known to transmit plant pathogens
In light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Plant disease symptoms need not harbor the pathogen propagules always
Reason R: Crown gall harbors Agrobacterium tumefaciens
In light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Phytoplasma is a motile bacterium
Reason R : Phytoplasma is transmitted by leaf hopper
In light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Antibiotics are sterilized by bacteriological filters but not by heat
Reason R : Antibiotics are thermo labile compounds
In light of the above statements, choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: While alloinfection increases disease incidence, the autoinfection increases the disease severity.
Reason R: Neither autoinfection nor alloinfection is sufficient to cause disease epidemics.
In light of the above statements, choose the correct answer from the options given below

Given below are two statements
Statement I: American grapevine root stock helped the French farmers to control root aphids
Statement II: Root aphid resistant American root stock was also resistant to grapevine downy mildew
In light of the above statements, choose the most appropriate answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In the Watson-Crick model of DNA, each turn of the helix is the length of 10 base pairs.
Reason R: Each complete turn of the double-stranded DNA helix is 3.4 \r{A long.
In light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: In DUS trials, the number and nature of varieties largely determines the use of experimental design.
Reason R: Randomized Incomplete Block Design is the most used experimental design in DUS trials.
In light of the above statements, choose the most appropriate answer from the options given below

Most commonly used enzymes for DNA manipulation include the following
A. Nucleases
B. Ligases
C. Polymerases
D. Kinases
E. Helicases
Choose the most appropriate answer from the options given below: