GATE XL topic:plant-pathology PYQs & Answers — Page 3

Questions 21–23 of 23. Imported answers require independent review unless marked reviewed.

Topic practice 23 questionsPage 3 of 3

Two of the vir operons of Ti plasmid in Agrobacterium tumefaciens are constitutively expressed. Identify the CORRECT pair.

Your answerChoose one option.

virA and virG

virF and virH

virC and virD

virB and virE

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Which of the following fungi is an example of obligate biotrophic plant pathogen?

Your answerChoose one option.

Alternaria brassicicola

Botrytis cinerea

Puccinia triticina

Sclerotinia sclerotiorum

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Match the pathogen, disease caused and the affected plant in the CORRECT combination.

Pathogen P. Blumeria graminis Q. Magnaporthe grisea R. Venturia inaequalis S. Cercospora personata

Disease i. Blast disease ii. Powdery mildew iii. Tikka disease iv. Scab disease

Plant

Groundnut

Apple

Barley

Rice

Your answerChoose one option.

P-i-1, Q-ii-2, R-iii-3, S-iv-4

P-i-2, Q-ii-1, R-iii-4, S-iv-3

P-ii-3, Q-i-4, R-iv-2, S-iii-1

P-ii-3, Q-i-4, R-iii-2, S-iv-1

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GATE XL topic:plant-pathology PYQs