AIPMT Biology 1997

aipmt–Past papers BIOLOGY- UNSOLVED PAPER - 1997

SECTION – I (Total Marks : 100) Single Correct Answer Type There are five parts in this question. Four choices are given for each part and one of them is correct. Indicate you choice of the correct answer for each part in your answer-book by writing the letter (a), (b), (c) or (d) whichever is appropriate

01 Problem The embryonated egg of Ascaris represents An egg with blastula An egg with a juvenile An egg with an egg An egg with gastrula

Problem 02 The vagus nerve is the cranial nerve numbering 7 5 10 9

Problem 03 Which of the following statements is correct regarding evolution of mankind ? Homo erectus is preceded by Homo habilis Neanderthal man and cro-magnon man were living at the same time Australopithecus was living in Australia None of these

Problem 04 In frog, ‘’fenestraovalis ’’ is The communication between the pharynx and the tympanic cavity The external opening of the tympanic cavity which is covered by the tympanic membrane The air filled cavity of the middle ear The opening in the auditory capsule which separates the middle ear from the internal ear

Problem 05 Foetal sex can be determined by examining cells from the amniotic fluid by looking for Chiasmata Kinetochore Barr bodies Autosomes

Problem 06 In frog, the surface of attachment of tongue is Pterygoid Hyoid apparatus Sphenoid Palatine

Problem 07 Fertilizing is a chemical substance produced from Polar bodies Middle piece of sperm Mature eggs Acrosome

Problem 08 What is common among amylase, rennin and trypsin? These are produced in stomach These act at pH lower than 7 These all are proteins These all are proteolytic enzymes

Problem 09 The roof of the cranium of frog is formed by Frontoparietal orbitosphenoid parasphenoid alisphenoid

Problem 10 high milk yielding varieties of cows are obtained by Use of surrogate mothers Super ovulation Artificial insemination All of these

Problem 11 The correct sequence of electron acceptor in ATP synthesis is Cyt. B, c, a3, a Cyt. C, b, a, a3 Cyt .a, a, b, c Cyt .b, c, a, a3

Problem 12 In human beings, the eggs are Mesolecitical Alecithal Microlecithal Macrolecithal

Problem 13 Amniocentesis is a process to Know about the disease of brain Determine any disease in heart Determine any hereditary disease in the embryo All of these.

Problem 14 In lungs, the air is separated from the venous blood through Transitional epithelium + tunica external blood vessel Squamous epithelium + endothelium of blood vessel Squamous epithelium + tunica media blood vessel None of these.

Problem 15 Which of the following will be curable in next two decades ? Tuberculosis Cancer Poliomyelitis None of these

Problem 16 Diphtheria is caused by Nematodes Bacteria Virus none of these

Problem 17 The life span of human WBC is approximately Between 2 to 3 months More than 4 months Less than 10 days Between 20 to 30 days.

Problem 18 Viruses possess Ribosomes to synthesize protein Organelle for its vital mechanism Either DNA or RNA None of these

Problem 19 A fruit fly is heterozygous for sex-linked genes, when mated with normal female fruit fly, the males specific chromosomes will enter egg cell in the proportion 3 : 1 7 : 1 1 : 1 2 : 1.

Problem 20 The most common indicator organism that represents polluted water is C.vibrio Entamoebahistolytica E.coli P.typhi.

Problem 21 If pancreas is removed, the compound which remain undigested is Proteins Carbohydrates Fats All of these .

Problem 22 Hormones thyroxine, adrenaline and the pigment melanin are formed from Tyrosine Proline Tryptophan Glycine .

Problem 23 What is common among silver fish , scorpion, crab and honey bee? Jointed legs Metamorphosis Compound eyes Poison glands.

Problem 24 Which of the following vitamins can be synthesized by bacteria inside the gut? D K B1 C.

Problem 25 Stratum germinativum is an example of which kind of epithelium ? Columnar Squamous Cuboidal Ciliated .

Problem 26 What is the most important factor for the success of animal population? Adaptability Inter-species activity Natality Unlimited food.

Problem 27 In coming years, skin related disorders will be more common due to Water pollution Depletion of ozone layer Pollutants in air Use of detergents.

Problem 28 Which of the following disease is now considered nearly eradicated from India ? Small pox Poliomyelitis Plague Kala-azar.

Problem 29 Which of the following is agranulocyte ? Basophil Neutrophil Lymphoeyte Eosinophil.

Problem 30 Protein synthesis is an animal cell, takes place In the cytoplasm as well as mitochondria Only on ribose attached to nucleon Only in the cytoplasm In the nucleolus as well as in the cytoplasm .

Problem 31 Common origin of man and chimpanzee is best shown by Binocular vision Chromosome number Dental formula Cranial capacity.

Problem 32 Basement membrane is made up of No cell product of epithelial cell Epidermal cell only Endodermal cell Both ‘b’ and ‘c’ .

Problem 33 Genetic identity of a human male is determined by Sex-chromosome Cell organelles Autosome Nucleolus.

Problem 34 In the fertile human female, approdiamtely on which of the menstrual cycle does ovulation take place ? Day 14 Day 18 Day 1 Day 8 .

Problem 35 In uretelic animals , urea is formed by Kreb’s cycle EM pathway Ornithin cycle Coris cycle .

Problem 36 In the chemistry of vision in mammals, the photosensitive substance is called Rhodopsin Melanin Scelerotin Retinol.

Problem 37 The Nissle’s granules of nerves cell are made up of DNA RNA Ribosome Protein.

Problem 38 The end product of fermentation are O2 and C2H5OH CO2 and acetaldehyde CO2 and O2 CO2 and C2H5OH.

Problem 39 The basis functional unit of human kidney is Nephridia Henle’s loop Nephron Pyramid .

Problem 40 Protein present in cartilage is Cartilagin Ossein Chondrin Oesein.

Problem 41 A person with the sex chromosomes XXY suffers from Gynandromorphism Klinefelter’s syndrome Down’s syndrome Turner’s syndrome

Problem 42 Honey is Alkaline Basic after some days Acidic Neutral .

Problem 43 The present population of the world is about 15 trillion 6 billion 500 million 100 million.

Problem 44 Which of the following symptoms indicate red sickness ? Nausca and loss of hair Ulcerated skin, nausea and loss of hair Red and ulcerated skin Nausea and anaemia.

Problem 45 The biofertilizers are Anabaena and Azolla Cow dung, manure and faryard waste Quick growing crop ploughed under soil None of these.

Problem 46 Pebrine is disease of Silk worm Lac insect Honey bee Fish.

Problem 47 Brown algae is characterized by the presence of Fucoxanthin Haematochrome Phycocyanin Phycoerythrin.

Problem 48 Bi-directional translocation of solutes takes place in Parenchyma Cambium Xylem Phloem.

Problem 49 The core metal of chlorophyll is Ni Cu Fe Mg.

Problem 50 What will be the effect on phytochrome in a plant subjected to continuous red light ? Phytochrome synthesis will increase Level of phytochrome will decrease Phytochroeme will be destroyed First (b) and (a) .

Problem 51 With an increase in the turgidity of a cell, the wall pressure will be Fluctuate Remain unchanged Increase Decrease .

Problem 52 Most of the lichens consist of Green algae and ascomycetes Brown algae and higher plant Blue green algae and basidiomycetes Red algae and ascomycetes .

Problem 53 Multicellular branched rhizoids and leafy gametophytes are the characteristics of Some bryophytes Pteridophytes All bryophytes Gymnosperms.

Problem 54 Which of the following is not caused by deficiency of mineral nutrition ? Etiolation Shortening of internode Necrosis Chlorosis .

Problem 55 Gobar gas contains mainly CO2 + H2 CO2 + H2O CH4 only CH4 + O2 .

Problem 56 During adverse season, therophytes survive by Rhizomes Seeds Bulbs Corms.

Problem 57 Bryophytes can be separated from algae, because they Possess archegonia Contain chloroplast Are thalloid forms Have no conducting tissue.

Problem 58 Which of the following step of translation does not consume a high energy phosphate bond? Peptidyltransferase reaction Amminocylt-RNA binding to A-site Translocation Amino acid activation .

Problem 59 The mechanism of ATP formation both in chloroplast and mitochondria is explained by Vhemiosmotic theory Munch’s hypothesis (mass flow model) Relay pump theory of Godlewski Cholodny-Wont’s model.

Problem 60 The CO2 content by volume, in the atmospheric air is about 3.34% 4% 0.0314% 0.34%.

Problem 61 In krebs’ cycle, the FAD precipitates as electron acceptor during the conversion of Fumaric acid to malic acid Succinic acid to fumaric acid SuccinylCoA to succinic acid a-ketogluatarate to succinylCoA.

Problem 62 Which of the following is a living fossil? Mirabilis jalapa Ginkgo biloba Pinuslongifolia Dalbergiasissoo.

Problem 63 Co-factor (prosthetic group) is a part of holoenzyme. It is Loosely attached organic part Loosely attached inorganic part Accessory non-protein substance attached firmly None of these .

Problem 64 The RNA that pick up specific amino acid from amino acid pool in the cytoplasm to ribosome during protein synthesis is called r-RNA RNA m- RNA t- RNA.

Problem 65 Genes located at the same locus of chromosomes are called Multiple alleles Polygenes Oncogenes None of these .

Problem 66 MAB stands for Mammals and biosphere Mammals and biology programme Man and biology programme Man and biosphere programme.

Problem 67 At maturity, which of the following is non-nucleated? Palisade cell Cortical cell Sieve cell Companion cell.

Problem 68 Ulothrix filaments produce Heterogametes Basicdiospores Isogametes Anisogametes.

Problem 69 Aril represents the edible part of Mango Apple Banana Litchi.

Problem 70 An alga, very rich in protein, is Chlorella Nostoc Spirogyra Ulothrix.

Problem 71 Which of the following is the key intermediate compound linking glycolysis to the Krebs’ cycle Malic acid Acetyl CoA NADH ATP.

Problem 72 How many mitotic divisions are needed for a single cell to make 128 cells? 28 32 7 14.

Problem 73 After crossing two plants, the progenies are found to be male sterile. This phenomenon is found to be maternally inherited and is due to some genes which reside in Mitochondria Cytoplasm Nucleus Chloroplast.

Problem 74 Evolutionary convergence is characterized by Development of dissimilar characteristics in closely related groups Development of a common set of characteristics in groups of different ancestry Development of characteristics by random mating Replacement of common characteristics in different groups .

Problem 75 Which plant will lose its economic value, if its fruits are produce by induced parthenocarpy? Orange Banana Grape Pomegranate.

Problem 76 DNA synthesis can be specific measured by estimating the incorporation of radio-labelled Thymidine Deoxyribose sugar Uracil Adnine.

Problem 77 Genes are package into a bacterial chromosome by Acidic protein Actin Histones Basic protein.

Problem 78 The codons causing chain termination are AGT, TAG, UGA UAG, UGA, UAA TAG, TAA, TGA GAT, AAT, AGT .

Problem 79 The hereditary material present in the bacterium E.coli is Single-stranded DNA Double-stranded DNA DNA RNA.

Problem 80 Which of the following structures will not be common to mitotic cell of a higher plant? Centriole Spindle fibre Cell plate Centromere.

Problem 81 Chlorophyll-a molecule at its carbon atom 3 of the pyrrole ring II has one of the following Carboxylic group Magnesium Aldehyde group Methyl group.

Problem 82 If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be Tetraploid Pentaploid Haploid Triploid.

Problem 83 Heterospory and seed habit are often exhibited by a plant possessing Petiole Ligule Bract Spathe.

Problem 84 When a cell is fully turgid, which of the following will be zero? Turgor pressure Water potential Wall pressure Osmotic pressure.

Problem 85 During cell division in apical meristem, the nuclear membrane appears in Telophase Cytokinesis Metaphase Anaphase.

Problem 86 A pigment which absorbs red and far-red light is Cytochrome Xanthophyll Phytochrome Carotene.

Problem 87 NADPH2 is generated through Photosystem II Anaerobic respiration Glycolysis Photosystem I.

Problem 88 Gibberellic acid induces flower In short day plants under long day conditions In day-neutral plants under dark conditions In some gymnospermic plants only In long day plants under short day conditions .

Problem 89 The site of respiration in bacteria is Ribosome Microsome Episome Mesosome.

Problem 90 Centromere is a part of Chromosome Endoplasmic reticulum Ribosomes Mitochondria.

Problem 91 If a person shows production of interferon's in his body, the chances are that he has got an infection of Tetanus Malaria Typhoid Measles.

Problem 92 Which of the following is an opiate narcotic? Amphetamines LSD Barbiturates Morphine.

Problem 93 Formation of ozone hole is maximum over Europe Africa India Antarctica.

Problem 94 The mutations are mainly responsible for Increasing the population rate Maintaining genetic continuity Constancy in organisms Variation in organisms .

Problem 95 Which of the following ecosystem has the highest gross primary productivity? Mangroves Rain forest Grassland Coral reef.

Problem 96 If a tree flowers thrice in a year (Oct. Jan. and July) in Northern India, it is said to be Photo and thermo-insensitive Photo and thermo-sensitive Photosensitive but thermo-insensitive Thermosensitive but photo-insensitive .

Problem 97 Which of the following is free-living aerobic non-photosynthetic nitrogen-fixing bacterium? Nostoc Azospirillum Rhizobium Azotobacter.

Problem 98 Which of the following acts as “nature’s scanvengers”? Insects Microorganisms Man Animals.

Problem 99 Phosphate pollution is caused by Sewage and phosphate rock Sewage and agricultural fertilizers Phosphate rock only Agricultural fertilizers only .

Problem 100 If an angiospermic male plant is diploid and female plant tetraploid, the ploidy level of endosperm will be Tetraploid Pentaploid Haploid Triploid.

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AIPMT Biology 1997

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