Biology Class 11 Chapter - 6
Prokaryotes - 19
1.
Soft rot of potato is caused by?
a) Xanthomonas oryzae
b) Eriwinia atroseptica
c) Eriwinia anylovora
d) Corynebacterium
2.
Corynebacterium causes?
a) ear rot of wheat
b) fire blight of potato
c) leaf spot of tomato
d) soft rot of potato
3.
Loss of turgidity in plant leaf blades results in?
a) increased growth
b) wilting of plant
c) leaf spot
d) fire blight
4.
Pseudomonas solanacaerum causes?
a) wilt disease of brassica
b) fire blight of potato
c) leaf spot of potato
d) wilt disease of potato
5.
Root nodule formation in legumes is caused by?
a) Agrobacterium tumifaciens
b) Xanthomonas compestris
c) Pseudomonas savastonoi
d) Rhizobium leguminosarum
6.
Xanthomonas compestris causes?
a) galls in potato
b) galls in cotton
c) galls in kikar
d) galls in legumes
7.
The various bacteria and fungi which are the permanent residents of human body are called as its?
a) normal fauna
b) pathogenic fauna
c) pathogenic flora
d) normal flora
8.
Largest number of normal flora of human body is present?
a) on skin and in oropharynx
b) on skin and in digestive tract
c) in vagina and in oropharynx
d) on skin and in vagina
9.
Clostridium species are present in?
a) oropharynx
b) vagina
c) colon
d) skin
10.
Viridans streptococci are present in?
a) colon and oropharxnx
b) skin and vagina
c) skin and colon
d) mouth and nasopharynx
11.
The normal flora of human beings limits the growth of pathogens.This ability is known as?
a) transduction resistance
b) colonization resistance
c) conjugation resistance
d) transformation resistance
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