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Posted By: richa Member Level: Silver Posted Date: 05 Jul 2008
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2006 Benaras Hindu University Botany b.sc (hons)part 3 examination 2006 Question paper
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botany
microbiology and plant pahtology
time 3 hours full marks 75
answer 5 questions each from section -A and section ,B section ,-C is compulsory all questions carry equal marks sections_A
1_ what do u know about symbiotic nitrogen fixation? write in brief the special features diazotrophs [marks 15]
2. write short notes on any two of the following; [marks 7.5*2]
(a) agrobacterium
(b)secondary metabolite
(c) halobacterium
3 . write brief account of any tow of the following;[marks 7.5*2]
(a)LPP1
(b)thermoplasma
(c)retrovirus
4.write a short account on various methods of microorganisms [marks 15]
section -B
5 .describe 5 mile stone in the development of the plant pathology and is scope. [ marks 7.5*2]
6. write brief notes on any two of the following; [ marks 7.5*2]
(a) blast in rice
(b)little leaf in brinjal
(c) PR protiens
7.write a short account on any two of the following[ marks 7.5*2]
(a) parasitism
(b) pathogenesis
(c)integrated disease management.
8. write a brief account of the important symptoms of the fungal disease and their control.[marks 15]
section c
9'attempt the following_ [marks 1.5*10]
(a) give an example of phyto alexin_
(b)downy mildew of crucifers is caused by_
(c)wilt disease of tomato is caused by_
(d)nitrogen fixation is carried out by the enzyme_
(e)Trichoderma harizianum is an important biological fungal agent (true/false)
(f)fusaric acid is non specific vivotoxin (true/false)
(g)annual recurrence of wheat rust in Indo-Gangatic plain was discovered by_
(h)name any non scontaining amino acid
(i)write the name of any 2 growth inhibitory hormones
(j) give an example of true one substrate enzyme
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