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Thursday, 5 November 2015

Test paper "Science"

Test  paper "Science" 

1. Stem is modified into cladode :
(A) Casuarina
(B) Asparagus
(C) Opuntia
(D) Euphorbia 

2. Verticillaster type of inflorescence is found in :
(A) Cotton 
(B) Datura
(C) Lilium 
(D) Ocimum

3. A simple one seeded fruit in which pericarp is fused with seed coat is :
(A) Achene 
(B) Caryopsis
(C) Cypsela 
(D) Nut

4. The portion of DNA which contains information for an entire polypeptide is called :
(A) Cistron 
(B) Muton
(C) Recon 
(D) Operon

5. Bicarpellary, syncarpous ovary with axile placentation is seen in :
(A) Solanaceae
(B) Caesalpinaceae
(C) Asteraceae
(D) Malvaceae

6. Alburnum is also called :
(A) Autumn wood
(B) Heart wood
(C) Sap wood
(D) Spring wood

7. The entry of pollen tube into the ovule through micropyle is called :
(A) Porogamy
(B) Mesogamy
(C) Anisogamy
(D) Chalazogamy

8. Type of pollination in Commelina is :
(A) Chasmogamy
(B) Geitonogamy
(C) Xenogamy
(D) Cleistogamy

9. The process of embryo formation without fertilization is known as :
(A) Apospory
(B) Apogamy
(C) Parthenocarpy
(D) Polyembryony

10. Which of the process Cholodny-Went theory is concerned with ?
(A) Photomorphogenesis
(B) Photoperiodism
(C) Phototropism
(D) Photorespiration

11. The hormone present in the liquid endosperm of coconut is :
(A) Cytokinin 
(B) Gibberellin
(C) Ethylene 
(D) Auxin

12. The phytohormone which influences apical dominance growth is :
(A) IAA 
(C) GA3 
(D) C2H4

13. An example of short day plant is :
(A) Wheat
(B) Maize
(C) Chrysanthemum
(D) Radish

14. The ovary after fertilization is converted into :
(A) Embryo 
(B) Endosperm
(C) Fruit 
(D) Seed

15. The molecular formula of Chlorophyll ‘a’ is :
(A) C55H72O5N4Mg
(B) C55H70O5N4Mg
(C) C55H72O6N4Mg
(D) C50H72O5N4Mg

16. The first compound that accepts CO2 during dark phase is :
(B) Ferrodoxin
(D) Cytochrome

17. Initiation codon for methionine is :
(A) AAA 
(C) UAA 

18. The deficiency of this micronutrient results in little leaf disease :
(A) Copper 
(B) Zinc
(C) Boron 
(D) Iron

19. Kranz anatomy is a morphological diversity in the leaves of :
(A) C3-plants
(B) C4-plants
(C) C3 and C4-plants
(D) CAM plants

20. Prechilling treatment to break seed dormancy is :
(A) Scarification
(B) Stratification
(C) Impaction
(D) Vernalization

21. The pyruvic acid formed during glycolysis is oxidized to CO2 and H2O in a cycle called :
(A) Calvin cycle
(B) Nitrogen cycle
(C) Hill reaction
(D) Krebs cycle

22. Respiratory quotient (RQ) is one in case of :
(A) Fatty acids
(B) Nucleic acids
(C) Carbohydrates
(D) Organic acids

23. An example of free living nitrogen fixing aerobic bacteria is :
(A) Clostridium
(B) Rhizobium
(C) Azotobacter
(D) Rhodospirillum

24. Identify the plant belonging to the Reed-Swamp stage in hydrarch succession :
(A) Juncus 
(B) Sagittaria
(C) Salix 
(D) Trapa

25. A gas produced by paddy fields and connected with global warming is :
(A) CO2 
(B) Chlorine
(C) H2S 
(D) Methane

26. If the strong partner is benefited and the weak partner is damaged, it is known as :
(A) Predation
(B) Allelopathy
(C) Symbiosis
(D) Commensalism

27. Acid rain is mainly caused due to increase in the levels of the gas(es) :
(A) SO2 only
(B) CO2 only
(C) SO2, CO2
(D) NO2 and SO2

28. The flow of energy among various trophic levels of an ecosystem is :
(A) Unidirectional
(B) Bidirectional
(C) Multidirectional
(D) Circular

29. Increase in atmospheric temperature due to CO2 is called :
(A) Pasteur effect
(B) Green-house effect
(C) Blackman effect
(D) Emerson effect

30. The protective-ozone layer is present in :
(A) Ionosphere
(B) Stratosphere
(C) Troposphere
(D) Lithosphere

More topics ..............

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