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IARI Phd Paper
IARI PHD entrance question paper with answer:
1. Prominent foul smell of Karnal bunt is due to
(A) Triethyl amine
(B) Trimethyl amine
(C) Dimethyl amine
(D) None
2. The most important process in chemical weathering
(A) Hydration
(B) Hydrolysis
(C) Oxidation
(D) Carbonation
3. Vector of leaf curl disease of cotton and tobacco
(A) Myzus persicae
(B) Aphis gossypi
(C) Bemesia tabaci
(D) Thrips tabaci
4. Vector of tomato spotted wilt
(A) Myzys persicae
(B) Aphis gossypi
(C) Bemesia tabaci
(D) Thrip tabaci
5. The level to which given pest population should be reduced to achieve the point where marginal revenue just exceeds marginal cost
(A) EIL
(B) ETL
(C) GEP
(D) DB
6. Reagent used for the extraction of phosphorus in alkaline soils
(A) Bray No.1
(B) Bray No.2
(C) Olesensreagent
(D) Both A & B
7. Pusa delicious is ................ Type of papaya
(A) Gynecious
(B) Gynodiecious
(C) Both
(D) None
8. The first insect resistant variety âunder hillâ is related to
(A) Apple
(B) Rice
(C) Wheat
(D) Peach
9. Odomos the mosquito repellent contains
(A) Pyrithrin
(B) Camphor oil
(C) Citronella Oil
(D) Neem oil
10. Based on Severity of damage Wheat pests which have been ranked in the order
(A) Brown rust >Loss smut>Termites>Karnal bunt
(B) Termites>Brown rust>Karnal bunt>Loos smut
(C) Brown rust>termites>karnal bunt>Loos smut
(D) Karnal bunt>Loos smut>Termites>Brown rust
11. India has monopoly in the production of
(A) Mulberry silk
(B) Tassar silk
(C) Eri Silk
(D) Muga silk
12. The pest which is a result feature and confined to a particular locality
(A) Epidemic
(B) Endamic
(C) Seasonal
(D) Sporadic
13. Bundle sheath chloroplast
(A) Lack stroma
(B) Lack granna
(C) Both A&B
(D) Both present
14. High auxin and low cytokinin favours........
(A) Root
(B) Shoot
(C) Bud
(D) Flower
15. Presursor of ethylene
(A) Tryptophan
(B) Ethane
(C) Ethionine
(D) Methionine
16. Kraz anatomy is seen in
(A) Rice
(B) Amaranthus
(C) Pineapple
(D) B & C
17. An international pest?
(A) Helicoverpa
(B) Spodoptera
(C) Schistocera
(D) Pectinophora
18. Carbohydrate factory of cell is
(A) Golgi body
(B) Chloroplast
(C) Cytosol
(D) Peroxisome
19. In photorespiration NH3 evolution take place at
(A) Mitochondria
(B) Chloroplast
(C) Cytosol
(D) Nucleolus
20. Organelles involved in photorespiration
(A) Chloroplast, Mitochondria, Peroxisome
(B) Chloroplast, Mitochondria, Glyoxysome
(C) Mitochondria, Peroxisome, Glyoxysome
(D) Mitochondria and Chloroplast only
21. Which one is a total root parasite
(A) Custuta
(B) Loranthus
(C) Santalum
(D) Rafflesia
22. Particle size of colloids is (in microns)
(A) < 2
(B) 1-100
(C) >100
(D) None
23. Term genetics was coined by
(A) Johnson
(B) Batson
(C) Punnet
(D) Morgan
24. Components of prokaryotic ribosome are
(A) 50s & 20s
(B) 40s & 30s
(C) 60s & 40s
(D) 50s & 30s
25. Plasma membrane is
(A) Permeable
(B) Non permeable
(C) Selectively permeable
(D) Partially permeable
26. ABO blood group is an example of
(A) Multiple alleles
(B) Linkage
(C) Pleotropy
(D) Over dominance
27. ..................... is a sex limited character
(A) Colour blindness
(B) Hemophelia
(C) Baldness
(D) None
28. The most common form of DNA is
(A) A DNA
(B) B DNA
(C) C DNA
(D) Z DNA
29. Replication of DNA is
(A) Semi conservative
(B) Dispersive
(C) Continous
(D) Conservative
30. ............ is the first cotton hybrid
(A) Varalakshmai
(B) H4
(C) Varuna
(D) Jayalakshmi
