JRF PLANT SCIENCE QUIZE

JRF PLANT SCIENCE QUIZ 13/07/2018

 1. M.S. Swaminathan Research Foundation is located at

(A) Coimbatore                         (B) Bangalore

(C) Hyderabad                               (D) Chennai

2.  The term “Green Revolution” was coined by

(A) Norman E. Borlaug                  (B) M.S. Swaminathan

(C) C.Subramanyam                           (D) William Gaud

3. C4 plants differ from C3 plants in having different

(A) Photosynthetic pigments

(B) Initial acceptor of CO2

(C) Assimilatory power

(D) End product

4. Who discovered that during photosynthesis, O2 comes from water and not from CO2

(A) Van Niel                        (B) Ruben and Kamen

(C) Warburg                            (D) Blackman

5.  Which of the following causes seed dormancy

A) Ethylene                     (B) Abscisic acid

(C) Gibberellins              (D) Starch

6.If pollen falls on stigma belonging to different flower borne on the same plant, it is

     (A) Genetically self pollination                    (B) Cross pollination 

   (C) Ecological cross pollination          (D) None of the above

7. Maize is

    (A) Cleistogamous               (B) Anemophilous  

  (C) Entomophilous               (D) Hygrophilous

8. Microscopic structure of flower that contains usually 8 nuclei is

     (A) Pollen grain    (B) Pollen tube

    (C) Embryo Sac    (D) Embry

9The stress hormone is 

   (A) IAA     (B) GA3     (C) ABA     (D) None of the above

10. Nitrogen is mainly absorbed by plants from soil in the form of 

   (A) N2     (B) NH4+     (C) NO2-                (D) NO₃-

11. Chlorosis due to deficiency of Nitrogen in crop plants become visible first in 

    (A) Old leaves                                                 (B) Young leaves  

  (C) Young leaves followed by old leaves          (D) Middle leaves.

12. Growth hormone that results in apical dominance is 

   (A) Auxin     (B) Gibberellin     (C) Cytokinin    (D) Ethylene

13Who coined the term “gene”?  

  (A) W. Johannsess    (B) Gregor Mendel     (C) Robert Hook    (D) Louis Pasteur

14 In DNA, the amount of adenine equal the amount of  

  (A) Cytosine    (B) Thymine

(C) Guanine     (D) Thymine + cytosine

15. Part of gynoecium which receives pollen is  

  (A) Ovule     (B) Ovary     (C) Style     (D) Stigma

16. Bread wheat is a

 (A) Monoploid   (B) Diploid (C) Tetraploid    (D) Hexaploid  

17. Atrazine is used for weed control in

(A) Maize    (B) Rice (C) Wheat    (D) Chickpea 

18. Phalaris minor is

 (A) An important weed of wheat crop   

(B) A medicinal plant used for cure of phylaria

 (C) An important oil seed crop           

  (D) An important ornamental crop 

19. When a heterozygote plant (Aa) is self pollinated, the proportion of homozygosity after four generation of selfing will be:

 (A) 50%     (B) 57% (C) 80.35%     (D) 93.75% 

20. Parthenium argentatum is also commonly called

 (A) Dhoob grass   (B) Common grass (C) Rice grass    (D) Congress grass 

21. Defuzzing of seeds is done in

 (A) Potato    (B) Jute (C) Cotton    (D) Soybean 

22. Dhaincha is a

 (A) Food grain crop   (B) Oil seed crop

 (C) Cash crop    (D) Green manure crop     

23. Cropping  intensity refers to

 (A) 100 X Number of crops/ net area under cultivation                                                    (B) 100 X cropped area / net area under cultivation                                                    (C) 100 X Total yield / net area under cultivation                                                                                                     (D) 100 X Economic yield / net area under cultivation   

24.To study mitosis, it is best to take a sample of

 (A) Xylem Cells   (B) Phloem Cells (C) Meristmatic Cells   (D) Pollen Cells

25. Mulch crops refer to

 (A) Crops grown to conserve soil moisture

(B) Crops grown for paper making

 (C) Crops grown for multiple purpose use      

 (D) Crops grown to purity air pollutants         

26. The name of dwarfing gene in wheat is:

 (A) Ph. Gene    (B) Norin-10 Gene (C) DEE-Geo-Woo-Gene  (D) S-Locus Gene 

27. Dapog is a method of 

(A) Nursery raising in rice  

 (B) Seed multiplication in sugarcane

(C) Post harvest treatment of tomato seeds

 (D) Method of bread making from wheat flour 

28. Fruit type in tomato is known as

 (A) Berry    (B) Drupe (C) Nut    (D) Caryopsis 

29. Cultivated potato is a;

(A) Diploid    (B) Triploid (B)  Allotetraploid   (D) Autotetraploid  

30. Jagannath is a mutant variety of

(A) Rice    (B) Wheat (C) Barley    (D) Maize 

31. Which of the following is NOT present in DNA?

 (A) Thiamine    (B) Adenine (C) Uracil    (D) Guanine 

 32. Tift 23 is an important source of male sterility in

 (A) Rice    (B) Pearlmillet (C) Mustard    (D) Sorghum

33. Sugarcane Breeding Institute is located in Coimbatore because

 (A) Tamil Nadu is the largest sugarcane producing State

 (B) The varieties of sugarcane respond best to the soil in the area

 (C) The climate is conducive for flowering in sugarcane

(D) No diseases of sugarcane occur in the region 

34. The colour certification tag for foundation seed is:

(A) Golden yellow   (B) White (C) Azure blue   (D) Green  

35. Ratooning is associated with

 (A) Mango cultivation   (B) sugarcane cultivation (C) Apple cultivation   (D) Maize cultivation 

36. Cardinal temperature of rice is

(A) Above 32oc   (B) between 30-32oc (C) Between 25-30oc   (D) less than 25oc 

37. Wide hybridization resulted in significant improvement in

(A) Sugarcane    (B) Maize (C) Chickpea    (D) sorghum 

38. Textural class of a soil refers to

 (A) Varying proportions of particles of different size groups

(B) Varying colours of the soil

 (C) Varying type of crops cultivated in the soil

(D) Varying availability of water in the soil  

39. Diameter of coarse sand particle is

 (A) More than 2mm                (B) between 2 to 0.2mm

 (C) between 0.2mm to 0.02     (D) between 0.02mm to 0.002 

40. Montmorillonite crystal lattice is

 (A) 1:1 layer silicate   (B) 2:1 layer silicate

(C) 2:2 layer silicate   (D) 2:3 layer silicate 

41.Chromosome pairing-synapsis occurs in meiosis in which stage

(A) Leptotene    (B) Zygotene (C) Pachytene    (D) Dikynasis

42. Straight fertilizer is a

(A) Fertilizer which is applied in straight lines only

 (B) Fertilizer which is produced indigenously

(C) Fertilizer which is specific to a particular crop

 (D) Fertilizer which supplies only one of the primary nutrient 

43. The percent of Nitrogen is Urea is

(A) 16%    (B) 26% (C) 36%    (D) 46% 

44. Varieties developed through mass selection in self-pollinated crops are genetically:

(A) Heterozygous and homogeneous (B) Homozygous and homogeneous

 (C) Homozygous and heterogeneous (D) Heterozygous and heterogeneous 

45. Exchange of genetic material takes place in meiosis at

(A) Interphase    (B) Diplotene (C) Pachytene    (D) Does not occur in meiosis

46. Whiptail disease of cauliflower is caused by

(A) Fe deficiency   (B) frost injury (C) Copper deficiency   (D) Mo deficiency 

47. A nutrient required particularly by oilseed crops is

 (A)  Sulphur    (B) Boron (C) Zinc    (D) Iron 

48. This organelle is known as power house of a cell

 (A) Mitochondria   (B) Chloroplast (C) Nucleus    (D) Ribosomes 

49. One or many dictyosomes constitute the

 (A) Glyozysomes   (B) Lysosomes (C) Mitochondria   (D) Golgi apparatus 

50. The number of chromosomes after meiosis are:

 (A) Half    (B)

 (B) Doubled

(C) Not changed    

D) Halved or doubled depending upon the tissue where it occurs  

(Answere  will be released after 24 hrs).