1. Lysozyme is:
1) An enzyme produced by viruses
2) An enzyme that breaks peptide bond
3) An endonuclease that cuts DNA
4) A bacterial enzyme that denatures cell walls
2. Glycolysis is:
1) Oxidation of sugars in cytosol
2) Break down of Glucose into three carbon compounds
3) Oxidation of Glucose/ Glycogen to form organic acids
4) Oxidative respiratory pathway
3. Pigments that show response to red light?
1) Chlorophylls
2) Phytochromes
3) Xanthophylls
4) Both (1) & (2)
4. A teacher wants to show pachytene stage to his pupils. Which of the following material is best suited for his demonstration?
1) Root apices
2) Theca of stamens
3) Germinating spore
4) Bone marrow
5. “Resurrection plant” belongs to:
1) Bryophytes
2) Gymnosperms
3) Pteridophytes
4) Angiosperms
6. Which of the following statements is/are correct?
a) Forest is a climax community in plant succession
b) Forest is an example of an ecosystem
1) Both (a) and (b) are incorrect
2) (a) is correct and (b) is incorrect
3) (a) is incorrect and (b) is correct
4) Both (a) and (b) are correct
7. Correct statement from the following?
a) Rhizobium is a free living soil bacterium
b) Rhizobium gets its nitrogen requirements from the soil
c) All leguminous plants associate symbiotically with Rhizobium
d) Leguminous plants cannot absorb nitrates from the soil
1) (a) and (b)
2) (b) and (c)
3) (c) and (d)
4) (d) and (a)
8. Which of the following organisms poses difficulty in extraction of its nuclear DNA?
1) Fungi
2) Plant tissue
3) Animal tissue
4) Gram positive bacteria
9. A student lifted a stone in a crop field only to find some seedling below it. All of them are elongated and without any pigment. This condition is:
1) Due to over production of ethylene in the absence of sufficient oxygen
2) Chlorosis, a condition developed in the absence of light
3) Photo-oxidation of pigments in insufficient light
4) Etiolation, the consequence of absence of light
10. Multinucleate protistan
1) Euglena
2) Albugo
3) Mycoplasma
4) Actinomycete
11. Marchantia is exemplified by:
1) Sexual dimorphism
2) Heterosporous
3) Independent sporophyte
4) Stalk less sex organs
12. In a population..
1) Chances of pollination decreases
2) High rate of source depletion occurs
3) Minimum competition between individuals
4) Variation exists
13. Nitrogen fixing bacteria that also performs photosynthesis is:
1) Azotobacter
2) Nitrosomonas
3) Rhodospirillum
4) Methanococcus
14. Feature not related to ‘slime molds’:
1) Chitinous cell wall
2) Insensitive to penicillin
3) Heterotrophic
4) Spore producing
15. Red colour of the Red Sea is due to:
1) Pollution of water with ferric salts
2) Enormous growth of specific blue green algae
3) Growth of large number of organisms with fucoxanthin
4) Enormous multiplication of Gonyaulax, a dinoflagellate
16. Before Mendel many others failed to discover the laws of heredity. The major reason for Mendel’s success is:
1) His choice of material for his experiments
2) Selection of true breeding parents
3) Self crossing the F1 generation plants
4) Confining his attention to a single character at a time
17. Which of the following is not related to downstream processing?
1) Drying
2) Crystallization
3) Chromatography
4) Southern Blotting
18. A mutant plant did not develop stomata. Which of the following is affected mostly?
1) Transpiration
2) Photosynthesis
3) Respiration
4) Mineral Nutrition
19. Photosynthetic apparatus in blue green algae:
1) Chloroplasts
2) Chromatophores
3) Mesosomes
4) Centrosomes
20. Collection of wild plants or its seeds/propagules, belong to a locality with all available alleles and preserving them is:
1) Herbarium
2) Flora
3) Gene bank
4) Genomic library
21. Specific layers present in the apical meristems of Angiosperms are referred as:
1) Histogens
2) Tunics
3) Embryonal layers
4) Germinal layers
22. Outermost suberized layer of mature roots is:
1) Epidermis
2) Periderm
3) Cork
4) Exodermis
23. A teak plant grown in the garden with regular watering..
1) Does not develop characteristic growth rings
2) Main axis grows straight with less lateral branching
3) Develops only tracheids but not vessels
4) Vascular cambium cuts off more phloem than xylem
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