MCQ On General Agriculture - 7

 

1. Prominent foul smell of Karnal bunt is due to
   (A) Triethyl amine (B) Trimethyl amine (C) Dimethyl amine (D) None
   Answer: (B) Trimethyl amine

2. The most important process in chemical weathering
   (A) Hydration (B) Hydrolysis (C) Oxidation (D) Carbonation
   Answer: (B) Hydrolysis

3. Vector of leaf curl disease of cotton and tobacco
   (A) Myzus persicae (B) Aphis gossypii (C) Bemesia tabaci (D) Thrips tabaci
   Answer: (C) Bemesia tabaci

4. Vector of tomato spotted wilt
   (A) Myzus persicae (B) Aphis gossypii (C) Bemesia tabaci (D) Thrips tabaci
   Answer: (D) Thrips 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
   Answer: (B) ETL

6. Reagent used for the extraction of phosphorus in alkaline soils
   (A) Bray No.1 (B) Bray No.2 (C) Olsen’s reagent (D) Both A & B
   Answer: (C) Olsen’s reagent

7. Pusa Delicious is ……………. type of papaya
   (A) Gynoecious (B) Gynodioecious (C) Both (D) None
   Answer: (A) Gynoecious

8. The first insect-resistant variety ‘Underhill’ is related to
   (A) Apple (B) Rice (C) Wheat (D) Peach
   Answer: (C) Wheat

9. Odomos, the mosquito repellent, contains
   (A) Pyrethrin (B) Camphor oil (C) Citronella oil (D) Neem oil
   Answer: (A) Pyrethrin

10. Based on severity of damage, wheat pests ranked in the order
    (A) Brown rust > Loose smut > Termites > Karnal bunt
    (B) Termites > Brown rust > Karnal bunt > Loose smut
    (C) Brown rust > Termites > Karnal bunt > Loose smut
    (D) Karnal bunt > Loose smut > Termites > Brown rust
    Answer: (A) Brown rust > Loose smut > Termites > Karnal bunt

11. India has monopoly in the production of
    (A) Mulberry silk (B) Tassar silk (C) Eri silk (D) Muga silk
    Answer: (D) Muga silk

12. The pest which is a regular feature and confined to a particular locality
    (A) Epidemic (B) Endemic (C) Seasonal (D) Sporadic
    Answer: (B) Endemic

13. Bundle sheath chloroplast
    (A) Lack stroma (B) Lack grana (C) Both A & B (D) Both present
    Answer: (B) Lack grana

14. High auxin and low cytokinin favours …………
    (A) Root (B) Shoot (C) Bud (D) Flower
    Answer: (A) Root

15. Precursor of ethylene
    (A) Tryptophan (B) Ethane (C) Ethionine (D) Methionine
    Answer: (D) Methionine

16. Kranz anatomy is seen in
    (A) Rice (B) Amaranthus (C) Pineapple (D) B & C
    Answer: (B) Amaranthus

17. An international pest?
    (A) Helicoverpa (B) Spodoptera (C) Schistocerca (D) Pectinophora
    Answer: (A) Helicoverpa

18. Carbohydrate factory of cell is
    (A) Golgi body (B) Chloroplast (C) Cytosol (D) Peroxisome
    Answer: (B) Chloroplast

19. In photorespiration, NH₃ evolution takes place at
    (A) Mitochondria (B) Chloroplast (C) Cytosol (D) Nucleolus
    Answer: (A) Mitochondria

20. Organelles involved in photorespiration
    (A) Chloroplast, Mitochondria, Peroxisome
    (B) Chloroplast, Mitochondria, Glyoxysome
    (C) Mitochondria, Peroxisome, Glyoxysome
    (D) Mitochondria and Chloroplast only
    Answer: (A) Chloroplast, Mitochondria, Peroxisome

21. Which one is a total root parasite?
    (A) Cuscuta (B) Loranthus (C) Santalum (D) Rafflesia
    Answer: (D) Rafflesia

22. Particle size of colloids is (in microns)
    (A) < 2 (B) 1–100 (C) > 100 (D) None
    Answer: (B) 1–100

23. Term genetics was coined by
    (A) Johnson (B) Bateson (C) Punnett (D) Morgan
    Answer: (B) Bateson

24. Components of prokaryotic ribosome are
    (A) 50S & 20S (B) 40S & 30S (C) 60S & 40S (D) 50S & 30S
    Answer: (D) 50S & 30S

25. Plasma membrane is
    (A) Permeable (B) Non-permeable (C) Selectively permeable (D) Partially permeable
    Answer: (C) Selectively permeable

26. ABO blood group is an example of
    (A) Multiple alleles (B) Linkage (C) Pleiotropy (D) Over dominance
    Answer: (A) Multiple alleles

27. ………………… is a sex-limited character
    (A) Colour blindness (B) Haemophilia (C) Baldness (D) None
    Answer: (C) Baldness

28. The most common form of DNA is
    (A) A-DNA (B) B-DNA (C) C-DNA (D) Z-DNA
    Answer: (B) B-DNA

29. Replication of DNA is
    (A) Semi-conservative (B) Dispersive (C) Continuous (D) Conservative
    Answer: (A) Semi-conservative

30. ………… is the first cotton hybrid
    (A) Varalakshmi (B) H4 (C) Varuna (D) Jayalakshmi
    Answer: (B) H4