Test paper "Science"
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November 05, 2015 |
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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
(B) ABA
(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 :
(A) NADP
(B) Ferrodoxin
(C) RUBP
(D) Cytochrome
17. Initiation codon for methionine is :
(A) AAA
(B) UUU
(C) UAA
(D) AUG
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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