Biology Model Practice Paper For AIPMT 2010 [Mains] Q. 1. Write the location and function of the following Cytoskeleton a. Phytol chain b. Synergid c. Sieve tube element d. Centromere e. Sol. Location– Cytoplasm of eukaryotic cell. Function– Support to the cell a. Location– Chlorophyll Function– Anchors the chlorophyll molecule into the lipid part of thylakoid membrane. b. Location– Embryo sac Function– Secreting chemotactically active substance for attracting pollen tube and forming seat for pollen tube discharge. c. Location– Phloem Function– Translocation of solute d. Location– Chromosome Function– Attachment of spindle fibres. e. Q. 2. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.com(a) What is shown in diagram (a)? What are (P) and (Q)? (b) Tell whether it is T1-phage or T2-phage? (c) Which type of ovule is this? Give one reason. (d) What is this type of flower called? Give examples of such flower: (e) Which type of aestivation is this? Give examples? Nostoc ; (P) = Heteroayst; (Q) = Akinete a. T2 -phage, (a) collar, (b) Tail fibre b. Anatropous ovule, Body of the ovule is inverted. c. Epigynous flower, e.g., Cucurbitaceae, Asteraceae d. Vexillary or des cending imbricate, e.g., Soyabean, Gram, Crotolaria, etc. e. Q. 3. Write down the types of placentation, inflorescence and fruit of the following Pea a. Coriander b. Wheat c. Sunflower d. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comMustard e. Sol. S. N. Plant Placentation Inflorescence Fruit (a) Pea Marginal Solitary axillary or terminal, raceme Pod orlegume (b) Coriander Axile Compound umbel Ceremocarp (c) Wheat Basal Spike of spike of spikelet Caryopsis (d) Sunflower Basal Capitulum Cypsela (e) Mustard raceme Parietal Corymbose Siliqua Q. 4. Differentiate between the following [Give one important difference] Culm and Caudex a. Slime moulds and fungi b. Cyathium and hypanthodium c. Biological magnification and eutrophication d. White rust and Brown rust e. Sol. (a) Culm Caudex Joint stem with solid nodes and hollow internodes e.g., Bambusa Unbranched cylindrical stem with crown of leaves at apex. Marked with scars of fallen leaves e.g., Coconut (b) Slime moulds Fungi Vegetative cell without cell wall but spores with cellulosic cell wall Vegetative cell with cell wall made up of either fungal cellulose or chitin or both. (c) Cyathium Hypanthodium Peduncle terminates into a single female flower. It is surrounded by a large number of male flowers in scorpoid cyme. Whole inflorescence is enclosed within a cup shaped involucre. Male flowers are represented only by a single stamen. Female flower is represented only by a tricarpellary pistil e.g., Euphorbia. Main axis forms a flesly cup-shaped receptacle. It has an apical opening called ostiole. Unisexual flowers are borne on the inner wall of the cup in cymose groups. Male flower are near the ostiole and fertile female flowers at the base of the cup. Besides these, sterile female flowers called gall flowers are also present e.g., Ficus. (d) Biological magnification Eutrophication Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comNon-biodegradable pesticides pass into food chain and increase in amount per unit weight of organisms with the rise in trophic level due to their accumulation in fat tissue. The phenomenon is called biomagnification. Due to run off from fields, lawns and detergent rich sewage into the water body there is nutrient enrichment of the water body. The phenomenon is called entrophication. It supports a dense growth of algae called algal bloom. (e) White rust Brown rust It is a fungal disease caused by Cystopus candidus or Albugo candidaon vegetative parts of crucifers. It is a fungal disease caused by Puccinia reconditaon vegetative parts of wheat plant. Q. 5. Match the column-I and Column-II Column-I Column-II (a) Jacob and Monod (i) Neurospora (b) One gene one enzyme hypothesis (ii) Operon (c) Griffith (iii) Reverse Transcriptase (d) Temin and Baltimore (iv) Okazaki fragments (e) DNA polymerase (v) Transformation (vi) Transduction (vii) Conjugation Sol. (a) – (ii), (b)– (i), (c) – (v), (d) – (iii) , (e)– (iv) Q. 6. Fill in the blanks with suitable words given in boxes: Marsilea Coralloid root Usnea Eichhornia Monoecious Pneumatophores Geitonogamy Cycas Pinus Dioecious Vivipary Xenogamy Oscillatoria Rhizophorahas both _______________________and _________________ a. (b) Aquatic plants are ______________________(Pteridophyte) and_______________________(Angiosperm) b. (c) Plant bearing both male and female flowers is called______________and the pollination between different flowers of the same plant is called_______________. c. ____________has ______________. d. Sol. Pneumatophores, Vivipary a. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comMarsilea, Eichhornia b. Monoecious, Geitonogamy c. Cycas, Coralloid root d. Q. 7. Give any two conditions for seed habit. a. Which of these shows tendency of seed habit? Lycopodium Equisetum Selaginella Pteris Dryopteris Pteridiun b. Suggest three ways to break seed dormancy. c. Sol. Heterospory, formation of female gametophyte inside magasporangium. a. Selaginella b. Mechanical scarification, stratification, impaction. c. Q. 8. Fill in the blanks Mutation can be defined as ______________________________variation. a. Mutation leads to evolution of _____________________ of a gene. b. Genes expressed only in homozygous state are_____________________. c. When both alleles of a gene are expressed it is __________________. d. Gene, which is most frequent is ________________type. e. Sol. Sudden heritable a. New alleles b. Recessive c. Codominance d. Wild type e. Q. 9. Who discovered photoperiodism? a. Select one SDP and one LDP from following plantsChrysanthemum , Rice, Spinach, Barley, b. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comRadish Who gave the term ‘Phytochrome’? Give one specific feature of phytochrome. c. Sol. Garner and Allard a. SDP – Chrysanthemum LDP – Spinach b. Borthwick, Induction of flowering c. Q. 10. Match the Column-I and Column-II Column-I Column-II (a) Indian Rhinoceros (i) Extinct (b) Acid rain (ii) Endangered (c) Somaclonal variations (iii) Gir forest (d) Protoplasm fusion (iv) Corbett National Park (e) Biopiracy (v) CFC (vi) Nitrogen oxide (vii) Sulphur oxide (viii) PEG (ix) Mutation (x) Tumeric Sol. (a)– (iv), (b)–(v), (c)–(xi), (d)– (viii), (e)–(x) Q. 11.Differentiate between Habitat and Niche a. Flora and Vegetation b. (a) Habitat Niche Habitat is a place where an organism lives. It represents a particular set of environmental conditions suitable for its successful growth. Niche represents not only the place where an organism lives but the range of conditions and resource qualities within which a species can survive and reproduce. (b) Flora Vegetation Total number of plant species found in an area constitutes it’s flora. Types of plants found in an area constitute the vegetation of the area e.g., Xerophytic vegetation is found in deserts. Q. 11.Differentiate between Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comHabitat and Niche a. Flora and Vegetation b. (a) Habitat Niche Habitat is a place where an organism lives. It represents a particular set of environmental conditions suitable for its successful growth. Niche represents not only the place where an organism lives but the range of conditions and resource qualities within which a species can survive and reproduce. (b) Flora Vegetation Total number of plant species found in an area constitutes it’s flora. Types of plants found in an area constitute the vegetation of the area e.g., Xerophytic vegetation is found in deserts. Q. 12. Answer the following question: Apart from CO2 , name other green house gases a. What is the type of movement of twiner and opening of flower? b. Sol. CFCs, CH4 (methane), N2O (nitrous oxide) a. Thigmotropism, Epinasty. b. Q. 13. Three groups of baby mice kept on complete diet a. fed basal diet without nutrient to be tested b. basal diet + carotene by feeding carrots c. (a) What is the trend shown by the graph? (b) Which nutrient deficiency is prevented is group c. (c) How does the overdose of Retinol, pyridoxine and ascorbic acid is dealt by the body? Sol. (a) Growth and weight are diet dependent. (i) a shows complete growth. (ii) c shows moderate kind of growth. (iii) b shows retarded growth. (b) Vitamin A (c) Overdoses of Retinol lead to Hyper vitaminosis because it is a fat soluble vitamin while pyridoxine and ascorbic acid are excreted in urine. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comQ. 14. Out of following animals – answer the questions. Whale, Earthworm, Bat, Starfish, Scorpion, Honey bee, Peafowl. Which animal is different from rest of animals? a. How many of these are poisonous, which class they belong to? b. Which animals belong to same class? c. Which animals are only representatives of their phylum? d. Which of the following have 3 ear ossicles. Name the ossicles in the order of sound transmission. e. Sol. Starfish: Starfish has radial symmetry while others have Bilateral ymmetry. a. Honey bee and scorpion are poisonous. Honey bee belongs to class insecta while scorpion belongs to class Arachinida. b. Whale and Bat both belong to class mammalia. c. Starfish and Earthworm belong to only representative of their phylum. d. Bat and Whale have malleus, Incus, Stapes in order of sequence. e. Q. 15. Age-Sex pyramid of (a) developed (b) developing nation. Pollution Pollution In the next 30 – 40 years what would be the trend of population years in both a. Where would the economic development per capita be greater? b. Where will there be more professional job opportunities, leading to migration? In IT, Nurses. c. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.comSol. population remains stable. exponential growth. a. A b. A, migration takes place from c. Q. 16.Diagram: Diagrammatic presentation of reflex action (showing knee jerk reflex) a. Which reflex is it? b. Where is it striking? c. What are errors in the above diagram? d. Sol. It is knee jerk reflex. a. Patella is striked to Judge the reflex. b. Efferent and Afferent pathway are reversed. c. White matter and gray matter are reversed. d. Q. 17.Nictitating membrane and Vermiform appendix are examples of which type of organs. a. Define vestigial organs b. Out of coccyx, mammary glands muscles of external ear and opacity of eye due to cataract are these 4 in same categories. c. Sol. They are vestigial organs. a. Vestigial organs are those organs which were functional in ancestors now have become functionless. b. Opacity of eye due to cataract is not vestigial. c. Q. 18. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.coma. b. Function of (1) and (2) in each diagram Q. 19. In photorespiration, RuBP is oxidized to form glycolate and glycerate. Glycolate enters the PCO cycle to regenerate glycerate. Draw a flow diagram of photorespiration to show different intermediates and the cell organelles involved. Downloaded From: http://www.doctorgyan.com Downloaded From: http://www.doctorgyan.com