1. Germplasm protection at a very low temperature is known as—
(A) Senescence (B) Vernalization (C) Cryopreservation (D) Emasculation
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2. A viral infection can be controlled by—
(A) Administering vaccines (B) Administering anti viral drugs
(C) Both (A) and (B) (D) Administering alkaloids
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3. The plasma membrane is followed by the colloidal organic fluid called—
(A) Cytosol (B) Matrix (C) Ground tissue (D) Both (A) and (B)
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4. ‘Palmella stage’ is met with in—
(A) Ulothrix and Sphagnum (B) Gnetum and Spirogyra
(C) Oedogonium and Riccia (D) Chlamydomonas
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5. Among the following fruits which one bears thalamus as its edible part ?
(A) Plum (B) Apricot (C) Peach (D) Cherry
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6. In the electron transport system, the final acceptor of proton is—
(A) Oxygen (B) Cytochrome b (C) Cytochrome a3 (D) Ubiquinone
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7. Electrons enter the electron transport system as part of hydrogen atoms attached to—
(A) NADH only (B) FADH2 only (C) Both NADH and FADH2 (D) None of the above
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8. The famous book of Charles Darwin ‘‘Origin of Species’’ by means of Natural Selection, was published in—
(A) 1859 (B) 1869 (C) 1879 (D) 1889
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9. The rate of energy at consumer level is called—
(A) Net productivity (B) Primary productivity
(C) Secondary productivity (D) Gross productivity
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10. Translation is the process in which—
(A) Protein is formed from RNA message (B) DNA is formed on DNA template
(C) DNA is formed on RNA template (D) m RNA is formed on DNA template
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11. Enzyme enterokinase converts—
(A) Trypsinogen into trypsin (B) Pepsinogen into pepsin
(C) Proteins into peptides (D) Caseinogen into casein
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12. Cell theory was proposed by—
(A) Darwin and Wallace (B) Bateson and Punnett
(C) Schleiden and Schwann (D) Fleming and Baltimore
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13. The edible portion of which of the following vegetable is not a stem ?
(A) Ginger (B) Potato (C) Sweet potato (D) All of the above
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14. What replaces epidermis in woody plants ?
(A) Pericycle (B) Cambium (C) Endodermis (D) Periderm
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15. In older trees, the inner annual rings are called—
(A) Phloem (B) Sapwood (C) Heartwood (D) All of the above
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16. Nostoc is known to perform—
(A) Photosynthesis and N2-fixation simultaneously (B) Either nitrogen fixation or photosynthesis at a time
(C) Only photosynthesis (D) Only nitrogen fixation
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17. From which plant seeds oil is obtained ?
(A) Arachis hypagaea (B) Cicer arietinum
(C) Saccharum officinarum (D) Saccharum munja
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18. Which of the following is an artificial ecosystem ?
(A) Grassland (B) Lake (C) Forest (D) Rice field
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19. Which among the following is/are the objective(s) of plant breeding ?
(A) Stress resistance (B) More yield (C) Better quality (D) All of the above
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20. Coir, also known as coco fibre, is obtained from the husk of the plant—
(A) Plum (B) Coconut (C) Mango (D) Citrus plant
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21. As mitosis begins, a condensed chromosome consists of two—
(A) Centrioles (B) Kinetochores (C) Centromeres (D) Chromatids
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22. The hypothesis that the early atmosphere, combined with an energy source, produced organic monomers was developed in the 1920s by—
(A) Miller and Urey (B) Fox and Pauling (C) Oparin and Haldane (D) Curie and Pasteur
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23. The category of molecules produced by Miller and Urey experiment was—
(A) Hot soups (B) Inorganic polymers (C) Organic monomers (D) None of the above
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24. The crossing-over frequency is proportional to the—
(A) Diploid number of chromosome (B) Genotypic frequency
(C) Recombinant phenotypic frequency (D) Haploid number of chromosome
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25. Which of the following is not a function of transpiration ?
(A) Excretion of minerals (B) Uptake of minerals
(C) Cooling of leaves (D) Uptake of water
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