Main sources of biofertilizers are Bacteria

1.If wheat field is inoculated with Rhizobium
(a) Soil will become nitrogen rich
(b) No effect on soil nitrogen
(c) Soil will be depleted of nitrogen
(d) Soil will become rich in calcium
Answer: (b)

2.In mushroom cultivation, Spawn is
(a) Compost
(b) Button stage
(c) Vegetative mycelium
(d) Harvested mushroom
Answer: (c)

3.Insect deterrent chemical extracted from neem (margosa) is
(a) Thiocarbamate
(b) Pyrethroid
(c) Azadirachtin
(d) Allethrin
Answer: (c)

4.Insecticide azadirachtin is got from
(a) Mango
(b) Neem
(c) Tulsi
(d) Shoe flower
Answer: (b)

5.Leaves of plant used as biofertilizer belong to
(a) Hibiscus
(b) Mango
(c) Anabeana
(d) Azolla
Answer: (d)

6.Leghaemoglobin is found in
(a) Root nodules of legumes
(b) Mycorrhiza
(c) coralloid roots
(d) Cyanobacteria
Answer: (a)

7.Leghaemoglobin occurs in
(a) Coralloid root
(b) BGA
(c) Around bacteriods
(d) Mycorrhiza
Answer: (c)

8.Leghaemoglobin takes part in
(a) Energy release
(b) Stimulating growth of Rhizobium
(c) N2 absorption
(d) Protecting nitrogenase
(e) Supply of oxygen
Answer: (d)

9.Leguminous plants are able to fix atmospheric nitrogen through symbiotic process. Which is not true about it?
(a) Leghaemoglobin scavenges oxygen and is pinkish in colour
(b) Nitrogenase is insensitive to Oxygen
(c) Nodules act as site for nitrogen fixation
(d) Enzyme nitrogenase catalyses conversion at atmospheric nitrogen to NH3
Answer: (b)

10.Main sources of biofertilizers are
(a) Bacteria
(b) Cyanobacteria
(c) Fungi
(d) All the above
Answer: (d)