1. Which one of the following is a living fossil ?
(a) Pinus longifolia (b) Dalbergia sisssoo
(c) Mirabilis (d) Ginkgo biloba
2. Warm ocean surge of the Peru Current recurring every 5–8 year or so in the East Pacific of South America is widely known as
(a) Gulf Stream (b) E1 Nino
(c) Aye Aye (d) Magnox
3. If there was no CO2 in the earth’s atmosphere the temperature of earth’s surface would be
(a) higher than the present (b) less than the present
(c) the same (d) dependent on t he amount of oxygen in the atmosphere
4. An orchid resembling the female of an insect so as to be able to get pollinated is due to phenomenon of
(a) mimicry (b) pesudocopulation
(c) pseudopollination (d) pseudoparthenocarpy
5. The most important feature of all living systems is to
(a) utilize oxygen to generate energy (b) replicate the genetic information
(c) produce gametes (d) utilize solar energy for metabolic activities
6. In five-kingdom system, the main basis of classification is
(a) structure of nucleus (b) mode of nutrition
(c) structure of cell wall (d) asexual reproduction
7. What is true for individuals of same species?
(a) Live in same niche (b) Live in same habitat
(c) Interbreeding (d) Live in different habitat
8. Which of the following is most important for speciation?
(a) Seasonal isolation
(b) Reproductive isolation
(c) Behavioural isolation
(d) Tropical Isolation
9. Reason of fast speciation in present day crop plants is
(a) mutation (b) isolation
(c) polyploidy (d) sexual reproduction
10. The quantity 1500 mL in the respiratory volumes of a normal human adult refers to
(a) maximum air that can be breathed in and breathed out
(b) residual volume
(c) expiratory reserve vol ume
(d) total lung capacity
11. In alveoli of the lungs, the air at the site of gas exchange, is separated from the blood by
(a) alveolar epithelium only
(b) alveolar epithelium and capillary endothelium
(c) alveolar epithelium, capillary endothelium and tunica adventitia
(d) alveolar epithelium, capillary endothelium, a thin layer of tunica media and tunica adventitia
12. The exchange of gases in the alveoli of the lungs takes place by
(a) simple diffusion (b) osmosis
(c) active transport (d) passive transport
13. The process of migration of chloride ions from plasma to RBC and of carbonate ions from RBC to plasma is
(a) chloride shift (b) ionic shift
(c) atomic shift (d) Na+ pump
14. Entry of pollen tube through micropyle is
(a) chalazogamy (b) misogamy
(c) porogamy (d) pseudogamy
15. Mainly conduction of water in an angiosperm occurs through
(a) tracheids (b) xylem vessels
(c) sieve tubes (d) All of these
16. Root system in a plant is well developed
(a) due to def iciency of auxins
(b) due to deficiency of cytokinins
(c) due to def iciency of minerals
(d) for increased absorption of water
17. In soil, water available for roots (to plants) is
(a) capillary water
(b) hygroscopic water
(c) gravitational water
(d) chemically bound wat er
18. Passive absorption of minerals depend on
(a) temperature
(b) temperature and metabolic inhibitor
(c) metabolic inhibitor
(d) humidity
19. Enzyme involved in nitrogen assimilation
(a) nitrogenase (b) nitrate reductase
(c) transferase (d) transaminase
20. In plants inulin and pectin are
(a) reserved food material
(b) wastes
(c) secretory material
(d) insect attracting material
21. Which aquatic fern performs nitrogen fixation?
(a) Azolla (b) Nostoc
(c) Salvia (d) Salvinia
22. Unique features of bryophytes is that they
(a) produce spores
(b) have sporophyte attached to gametophyte
(c) lack roots
(d) lack vascular tissues
23. Which of the following cannot fix nitrogen ?
(a) Nostoc (b) Azotobacter
(c) Spirogyro (d) Anabaena
24. Agar is commercially obtained from
(a) red algae (b) green algae
(c) brown algae (d) blue-green algae
25. The absence of chlorophyll, in the lowermost cell of Ulothrix, shows
(a) functional fission (b) tissue formation
(c) cell characteristic (d) beginning of labour division
26. A well developed archegonium with neck consisting of 4-6 rows of neck canal cells, characterises
(a) gymnosperms only
(b) bryophytes and pteridophytes
(c) pteridophyies and gymnosperms
(d) gymnosperms and flowering plants
27. The plant body of moss (Funaria) is
(a) completely sporophyte
(b) completely gametophyte
(c) predominantly sporophyte with gametophyte
(d) predominantly gametophyte with sporophyte
28. Blue-green algae belong to
(a) eukaryotes (b) prokaryotes
(c) Rhodophyceae (d) Chlorophyceae
29. Seed habit first originated in
(a) certain ferns (b) certain pines
(c) certain monocots (d) primit ive dicots
30. Which one of the following is a living fossil ?
(a) Pinus (b) Opuntia
(c) Ginkgo (d) Tsuja
31. In which one of these the elaters are present along with mature spores in the capsule (to help in spore dispersal)?
(a) Riccia (b) Marchantia
(c) Funaria (d) Sphagnum
32. Ulothrix filaments produce
(a) isogametes (b) anisogametes
(c) heterogametes (d) basidiospores
33. Which of the following hormones can replace vernalization?
(a) Auxin (b) Cytokinin
(c) Gibberellins (d) Ethylene
34. Which one increases in the absence of light?
(a) Uptake of minerals
(b) Uptake of water
(c) Elongation of internodes
(d) Ascent of sap
35. Leaves of many grasses are capable of folding and unfolding because they
(a) are very thin
(b) are isobilateral
(c) have specialized bulliform cells
(d) have parallel vascular bundles
36. Which of the following movement is not related to auxin level?
(a) Bending of shoot towards light
(b) Movement of root towards soil
(c) Nyctinastic leaf movements
(d) Movement of sunflower head tracking the sun
65. The site of respiration in bacteria is
(a) episome (b) mesosome
(c) ribosome (d) microsome
66. Two bacteria found to be very useful in genetic engineering experiments are
(a) Escherichia and Agrobacterium (b) Nitrobacter and Azotobacter
(c) Rhizobium and Diplococcus (d) Nitrosomonas and Klebsiella
67. The main role of bacteria in the carbon cycle involves
(a) photosynthesis
(b) chemosynthesis
(c) digestion or breakdown of organic compounds
(d) assimilation of nitrogenous compounds
68. Photosynthetic bacteria have pigments in
(a) leucoplasts (b) chloroplasts
(c) chromoplasts (d) chromatophores
69. The chemical compounds produced by the host plants to protect themselves against fungal infection is
(a) phytotoxin (b) pathogen
(c) phytoalexins (d) hormone
70. White rust disease is caused by
(a) Claviceps (b) Altemaria
(c) Phyt ophthora (d) Albugo candida
71. The organism, used for alcoholic fermentation, is
(a) Pseudomonas (b) Penicillium
(c) Aspergillus (d) Saccharomyces
72. Which one produce androgenic haploids in anther cultures ?
(a) Anther wall
(b) Tapetal layer of anther wall
(c) Connective tissue
(d) Young pollen grains
86. Apiece of bone such as femur of frog if kept in dilute HCI for about a week will
(a) assume black colour (b) shrink in size
(c) turn flexible (d) crack into pieces
87. During an injury nasal septum gets damaged and for its recovery which cartilage is preferred?
(a) Hyaline cartilage (b) Elastic cartilage
(c) Calcified cartilage (d) Fibrous cartil age
88. Which cells do not form layer and remain structurally separate?
(a) Epithelial cell s (b) Muscle cells
(c) Nerve cells (d) Gland cells
89. Which cartilage is present at the end of long bones?
(a) Calcified cartilage (b) Hyaline cartil age
(c) El astic cartilage (d) Fibrous cartil age
90. Collagen is
(a) fibrous protein (b) globular protein
(c) lipid (d) carbohydrate
91. For person suffering from high blood cholesterol, the physicians recommend
(a) pure ‘deshi ghee’ or b utter
(b) vegetable oil such as groundnut oil
(c) red meat with layers of fats
(d) vanaipati margarine
92. In frog, the surface of attachment of tongue is
(a) sphenoid (b) palatine
(c) pterygoid (d) hyoid apparatus
Answer Key:
Biology :-
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Hints and Explainations:
Biology
3. CO2 in atmosphere absorbs heat radiations from earth
14. In zoology it is used for a type of parthenogenesis in which the sperm stimulates the egg cell to develop into an embryo, but no male inheritance is transmitted. In botany, pseudogamy is used for any reproductive process that requires pollination but does not involve male inheritance.
33. Vernalization (from Latin: vernus, of the spring) is the acquisition of a plant‘s ability to flower or germinate in the spring by exposure to the prolonged cold of winter
36. Nyctinasty is the circadian rhythmic nastic movement of higher plants in response to the onset of darkness. Examples are the closing of the petals of a flower at dusk and the sleep movements of the leaves of many legumes.
51. The perianth consists of a calyx of 4 distinct sepals and typically a corolla of 4 distinct petals that are commonly clawed and diagonally disposed. This condition of the stamens is described as tetradynamous
65 An episome is a portion of genetic material that can exist independent of the main body of genetic material (called the chromosome) at some times, while at other times is able to integrate into the chromosome Microsomes are vesicle-like artifacts formed from the endoplasmic reticulum (ER) when eukaryotic cells are broken-up in the laboratory; by definition, microsomes are not ordinarily present in living cells
69 Phytotoxin refers to a substance produced by a plant that is toxic or a substance that is toxic to the plant. Many substances produced by plants are secondary metabolites and are the by-products of primary physiological processes. Some examples of phytotoxins are alkaloids, terpenes, phenolics, herbicides and substances produced by bacteria.
86 HCl cuases bone desorption i.e. demineralization
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