BIO PEST CONTROLE | MCQ

1. Types of manures are

(a)   Farmyard, composited and green

(b)   Green and farmyard

(c)   Green and composited

(d)   Farmyard and composited

2. BGA is chiefly used as fertilizer in

                                                                        [MP PMT 1995; Pb. PMT 1998]

(a)   Wheat                                    (b)   Paddy

(c)   Mustard                                 (d)   Gram

3. In insect ecdysone takes part in [RPMT 1998]

(a)   Growth and development

             (b)   Maturation into adult

(c)   Moulting till pupa is formed

(d)   Secretion of cuticle

4. Which one is a biofertilizer [JKCMEE 2000; JIPMER 20000]

(a)   NPK mixture

(b)   Rhizobia in legume roots

(c)   Rhizobia in farmyard manure

(d)   Green manure

5. VAM is

(a)   Vesicular-arbuscular mycorrhiza

(b)   Variable adenine mutation

(c)   Variable associative mutualism

(d)   Vitamins and minerals

6. Enzyme required for nitrogen fixation is [CBSE PMT 2001]

(a)   Nitrogenase                          (b)   Nitroreductase

(c)   Transaminase                      (d)   Transferase

7. Which one of the following is free living nitrogen fixing bacterium          [BHU 2002]

(a)   Azotobacter                          (b)   Anabaena azollae

(c)   Pseudomonas                       (d)   Cyanobacterium

1. (a) Farmyard manure, compost and green manure all they are bio-fertilizers.
2. (b) BGA (Blue-green algae) for the nitrogen fixing.
3. (b) All cyanophyceae member’s are biofertilizers because they has fixing of N₂ e.g. Nostoc, Rebulla, Rhizobia etc.
4. (a) Fungal hyphal tips into the host vesicular cell and arbuscules. Hence VAM (Vesicular-arbuscular mycorrhiza).
5. (a) The N₂ has fixed in form of NO₃^{– –}  by the help of nitrogenase.
6. (a) Azotobacter is cyanobacteria which fixed N₂.

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