1
NEET 2019
MCQ (Single Correct Answer)
+4
-1
What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm?
A
Acidic pH of stomach
B
Body temperature
C
Alkaline pH of gut
D
Moist surface of midgut
2
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Select the correct group of biocontrol agents.
A
Oscillatoria, Rhizobium, Trichoderma
B
Nostoc, Azospirillium, Nucleopolyhedrovirus
C
Bacillus thuringiensis, Tobacco mosaic virus, Aphids
D
Trichoderma, Baculovirus, Bacillus thuringiensis
3
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Match the following organisms with the products they produce :
(a) Lactobacillus (i) Cheese
(b) Saccharomyces cerevisiae (ii) Curd
(c) Aspergillus nige (iii) Citric Acid
(d) Acetobacter aceti (iv) Bread
(v) Acetic Acid

Select the correct option.
A
(a) (b) (c) (d)
(iii) (iv) (v) (i)
B
(a) (b) (c) (d)
(ii) (i) (iii) (v)
C
(a) (b) (c) (d)
(ii) (iv) (v) (iii)
D
(a) (b) (c) (d)
(ii) (iv) (iii) (v)
4
NEET 2019
MCQ (Single Correct Answer)
+4
-1
Thiobacillus is a group of bacteria helpful in carrying out :
A
Nitrification
B
Denitrification
C
Nitrogen fixation
D
Chemoautotrophic fixation
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Class 12