Quiz 4
31) Which of the following are correct about CaMV?
(A) CaMV genome contains 3 discontinuities
(B) CaMV has 8 tightly packed genes
(C) CaMV has dsDNA
(D) All of the above
Correct Answer :All of the above
32) The promoter of CaMV is:
(A) 35 S
(B) Emu
(C) Adh1
(D) All of above
Correct Answer :35 S
33) Viruses with RNA as genomes, requires ______ for their replication?
(A) Viral coded polymerases
(B) DNA poly III
(C) Helicase
(D) RNA poly I & III
Correct Answer :Viral coded polymerases
34) After synthesis in host cell, the DNA viruses are assembled in the _____.
(A) Nucleus
(B) Mitochondria
(C) Chromosomes
(D) Vacuoles
Correct Answer :Nucleus
35) Plant viruses can be cultivated by______.
(A) Rubbing virus suspension on leaves
(B) Coculturing virus with protoplast culture
(C) Both the above
(D) None of these
Correct Answer :Both the above
36) Coat protein (CP) gene in Brome Mosaic Virus (BMV) is located on
(A) RNA segment 1
(B) RNA segment 2
(C) RNA segment 3
(D) DNA
Correct Answer :RNA segment 3
37) The bacterial gene “Cat” was inserted in BMV in the:
(A) CP gene
(B) RNA segment 2
(C) Both the above
(D) None of these
Correct Answer :CP gene
38) Which of the following material is used as negative staining in electron
microscope?
(A) Acetocaramine
(B) Feulgen fuschin
(C) Phosphotungstic Acid
(D) Crystal violet
Correct Answer :Phosphotungstic Acid
39) Which of the following is a symptom of virus infection in plants?
(A) Mosaic pattern on leaves
(B) Yellow of leaves
(C) Witches brooms
(D) All of above
Correct Answer :All of above
40) Transmission of bean mosaic virus and necrotic ring spot virus in plants
takes place through
(A) Suckers
(B) Rhizomes
(C) Corms
(D) Pollen grains
Correct Answer :Pollen grains
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Plant Pathologists are scientists concerned with the understanding of the dynamic processes involved in the plant health. Plant Pathology is defined as the study of the organisms and environmental conditions that cause disease in plants, the mechanisms by which this occurs, the interactions between these causal agents and the plant (effects on plant growth, yield and quality), and the methods of managing or controlling plant disease. It also interfaces knowledge from other scientific fields such as mycology, microbiology, virology, biochemistry, bio-informatics, etc Keyword: plant pathology exam questions
Keyword:- Plant Pathology mcq pdf
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