REVISION DE OTROS ESTUDIOS Y METODOLOGIAS

SECTION A

1. At which stage is the fate of genetic constitution of gametes finally decided ?

(a) metaphase - I (b) anaphase - I (c) anaphase - II (d) interkinesis

2. An anticodon of fRNA can recognise more than one codon of raRNA. It is

(a) Wobble hypothesis (b) Gene flow hypothesis (c) Template hypothesis

(d) Richmond and Lang effect

3. A scientist wants to study effect of virus on a plant. Which part he should exclude for inoculation ? (a) shoot apex (b) stem cortex (c) phloem (d) pith 4. Azolla is used as biofertilizer because it (a) multiples very fast to produce massive biomass (b) has association of nitrogen fixing Rhizobium (c) has association of nitrogen fixing cyanobacteria (d) has association of mycorrhiza

5. Which one is used in production of alcohol ? (a) Saccharomyces cerevisiae

(b) Torulopsis ulilis (c) Clostridium botulinum (d) Leuconostoc citrovonum 6. Species are considered as (a) real basic units of classification (b) lowest units of classification (c) artificial concept of human mind

(d) real units of classification devised by taxonomists 7. Plants having (spores), xylem and phloem but lacking seeds/flowers are

(a) bryophytes (b) gymnosperms (c) pteridophytes (d) angiosperms 8. Emerson effect is related to

(a) decrease in photosynthesis in presence of high light intensity

(b) decrease in photosynthesis when lights of two different wavelengths are provided together

(d) increase in photosynthesis when light of two different wavelengths are provided together.

9. In noncyclic photophosphorylation the pigment molecule first excited is

(a) (c) ^680 chlorophyll b ( b ) P7oo (d) xanthophyll

10. Both ATP and Mg2+ are involved in the activity of (a) pyruvic kinase (b) glucokinase

11. In glycolysis during oxidation electrons are removed by

(a) ATP (b) GAP

12. Ovule is inverted with body fused to funicle, micropyle lying close to hilum and facing the placenta. It is (a) hemitropous (b) orthotropous (c) anatropous (d) campylotropous 13. Nontransfer of pollen from anther to stigma of the same flower due to a mechanical barrier is

(a) dichogamy (b) herkogamy (c) heterostyly (d) cleistogamy 14. Industrial melanism is an example of (a) drug resistance

(b) darkening of skin due to smoke

(c) protective resemblance with the surrounding (d) defensive adaptation against U.V. radiations 15. Fossil evidence indicates that original place for start of human evolution was

(a) Java (b) France (c) Africa (d,) China

16. One of the genes present exclusively in the X-chromosome in humans is concerned with

(a) baldness

(b) red-green colour blindness (c) facial hair or moustaches in males (d) night blindness

17. In silkworm, if juvenile hormone is absent at the time of larval moulting, the worm will

(a) die (b) moult into larval stage (c) moult into pupa (d) moult into adult. 18. Crustacean fishery is connected with exploitation of (a) oysters and crabs (b) mussels and squids (c) shells and cuttle fish (d) lobster and prawn 19. A person has whitish grey coloured stool due to malfunctioning of an organ

(a) pancreas (b) liver (c) spleen (d) kidneys. 20. A severe form of jaundice is caused by (a) hepatitis C (b) HIV (c) hepatitis A (d) hepatitis B

21. Extract of fruiting body of Claviceps that yields LSD is called

(a) theobromine (b) ergot (c) puffball (d) phytoalexin

22. Increasing skin cancer and high mutation rate are due to

(a) acid rain (b) ozone depletion (c) CO pollution (d) C 02 pollution

23. In a population, rate of addition of new members is higher than the rate of individuals lost. It shows (a) zero population growth (b) declined growth (c) exponential growth (d) none of these 24. Value of cardiac output is

(a) auricular volume x ventricular volume (b) stroke volume x rate of heart beat (c) blood pumped in one minute (d) both (b) and (c)

25. During selective reabsorption, most of water is reabsorbed from collecting tubules whose permeability is controlled by

(a) oxytocin of posterior pituitary (b) ADH of posterior pituitary (c) vasopressin of anterior pituitary (d) prolactin of anterior pituitary

26. Hypothalamus controls the production of pituitary hormones

(a) ACTH (corticotropin), GH (growth hormone) and ADH (vasopressin)

(b) FSH and progesterone (c) TSH (thyrotropin) and Cortisol

(d) LH (luteinising hormone), ACTH (corticotropin) and TSH (thyrotropin)

27. Velocity of nerve impulse is more in (a) medullated nerve fibres

(b) non-medullated nerve fibres

28. Ventral root of spinal nerve is composed of (a) somatic motor and visceral sensory fibres (b) somatic sensory and visceral sensory fibres (c) somatic motor and visceral motor fibres (d) somatic sensory and visceral motor fibres 29. Joint permitting rotary movement is (a) hinge joint (b) pivot joint (c) peg and socket joint (d) gliding joint

30. Axis is distinguished from other vertebrae in having (a) odontoid process (b) bifid spine

(d) small transverse process

31. Elastic tissue which supports testis and is in contact with cauda epididymis is

(a) gubernaculum (b) dartos (c) raphe (d) cremaster

32. Primitive endoskeletal structure found in mammalian embyro is

(a) vertebral column (b) notochord (c) spinal cord (d) visceral cord. 33. Aquatic photodiffraction produces zones. (a) euphotic, disphotic and aphotic

(b) aphotic, euphotic and disphotic (c) euphotic, aphotic and disphotic (d) disphotic, aphotic and euphotic.

34. Competition for light, nutrients and space is most severe between

(a) closely related organisms growing in different niches (b) closely related organisms growing in the same area/

niche

(d) distantly related organisms growing in different niches

35. Clinostat is the apparatus used to (a) measure the rate of growth in plant (b) measure the quantity of auxin in plant (c) measure the effect of light on plant (d) eliminate the effect of gravity on plant

36. Which of the following physiological effects is caused in plants by gibberellic acid ?

(a) shortening of genetically tall plants (b) elongation of genetically dwarf plants (c) rooting in stem cuttings

(d) yellowing of young leaves

37. Ubisch bodies are connected with the formation of (a) sporopollenin (b) intine and pollenkitt (c) exine (d) pollenkitt and pollinia 38. Essentiality of a mineral is determined by growing plants in

(a) soil lacking element

(b) soil having only the particular element (c) inert medium having the particular element (d) inert medium having nutrient solution lacking the

particular element

39. Which one is against the theory of ascent of sap by Dixon and Jolly ?

(a) pores in tracheary elements (b) adhesion force of water molecules (c) cohesion force of water molecules (d) requirement of ATP

40. During absorption of water by roots, the water potential of cell sap is lower than that of

(a) pure water and soil solution (b) neither pure water nor soil solution

(c) pure water but higher than that of soil solution (d) soil solution but higher than that of pure water 41. Which one has alternate striations and is correctly matched ?

(a) biceps under autonomous control (b) iris muscles under control of will (c) heart muscles, involuntary

(d) muscles of visceral organs under autonomous control 42. Locomotion in earthworm is directly facilitated by (a) mucus secreted by epidermis

(b) segmentation of the body (c) rhythmic contraction of segments (d) setae and contraction of segments

43. When xylem is surrounded by phloem on all sides, the vascular bundle is called

(a) amphivasal or leptrocentric (b) bicollateral (c) radial (d) amphicribal or hadrocentric

44. A graminaceous spikelet is surrounded b y (a) two scales called glumes

(b) two scales called lemma and pale (c) two scales called lodicules (d) none of the above

45. Lomentum is a fruit characterised by (a) dehiscence from both sutures (b) dehiscence from one suture (c) indehiscent nature

(d) constrictions in between the seeds

46. An example of gene therapy is

(a) production of injectable hepatitis B vaccine (b) production of vaccines in food crop

(d) production of test tube babies through artiifical insemination and implantation.

47. Diameter of DNA is/Wilkin's X-ray diffraction showed DNA diameter to be

(a) 200A (b) 100A •(c) 20A (d) 50A

48. The stage following infection by virus when virus particles cannot be observed is

(a) infection phase (b) eclipse phase (c) maturation phase (d) lysogenic phase 49. The scientist who created the group protista for both unicellular plants and animals is

(a) Haeckel (b) Pasteur (c) Lister (d) Koch

50. A person exposed to cold environment does not show (a) shivering

(b) vasoconstriction of peripheral vessels

51. Which of the following diseases are due to deficiency of fat soluble vitamins ?

1. cheilosis 2. keratomalacia 3. pellagra 4. rickets

52. Which of the following events asociated with fertilization ?

1. capaciation

2. restoration of the diploid number of chromosomes reduced during meiosis

3. activation of ovum

4. formation of body of embryo

53. Which of the following match is/are correct ? 1. luteotropic hormone : stimulates the growth of

mammary glands, lactation and maintenance of corpus luteum

2. melatonin : helps in vasoconstriction of blood vessels

3. adrenocorticoids : regulate Na+ level through kidneys, regulate fat, protein and carbohydrate metabolism and decreases K.+ ions

4. vasopressin : causes contraction of uterus at the time of child birth.

54. Which of the f o l l o w i n g is correct regarding respiration ?

1. no organism can live without respiration 2. it takes place at every time day and night 3. it involves utilization of carbon dioxide and water 4. during aerobic respiration, ceils produce bioenergy by complete oxidation of glucose into CO and water u s i n g m o l e c u l a r oxygen obtained from the environment.

55. Which of the following cranial nerves carry impulse from receptor to central nervous system ?

1. trochlear 2. olfactory 3. abducens 4. auditory 56. Terrestrial animals

1. have waxy coating of exoskeleton shells and multiple layer of dead keratinized skin cells to minimise water loss from their surfaces

2. have nervous and hormonal mechanisms to control thirst

3. regulate water and solute by eliminating divalent cations with faeces

4. for example, camel, when water is not available, produce urine and stores uric acid in tissues and solely depend on metabolic water.

57. Blood vessels (excepts capillaries) are made up of three layers, surrounding the central blood carrying canal. These layers are

1. tunica vaginalis 2. tunica intima 3. tunica albugineae 4. tunica adventitia 58. Myogenic heart is present in

I. mollusca 2. pisces 3. mammalia 4. annelida 59. Organ specific autoimmune diseases are 1. Hashimoto's thyroiditis

2. rheumatoid arthritis

3. Myasthenia gravis 4. systemic sclerosis 60. A cell membrane consisting of aphospholipid bilayer with a single continuous layer of protein molecules on either surface is called as

1. Sandwich model 2. Lamellar theory 3. Danielli and Davson model

4. Robertson model

61. Plant and animal cells, both have in common is/are

1. cell membrane 2. nucleolus 3. cell wall 4. chloroplast

62. Which of the following statements are correct ? 1. digenic is the condition of sexlinked inheritance in

which sexlinked genes are present on the homologous part of X chromosomes and are passed from male parent to male grandson through daughters of F, generation

2. diandric is the condition in which 2X chromosomes of female's behave as if these are completely h o m o l o g o u s and f e m a l e passes its one X chromosome (which might have recieved from female previously) to the male of next generation 3. holandric is the condition of X linked genes in

particular those present on non-homologous part of X chromosome and passed on directly from father to son

4. hologenic is the condition of sexlinked inheritance in which a character is directly passed from male to female.

63. Psychotropic drugs are 1. mood altering drugs

2. of four types - sedatives, tranquillizers, stimulants and hallucinogens

3. drugs which depress central nervous system, kill pain, induce drowsiness and sleep

4. non-addicting drugs

64. Thinning of ozone shield is being caused by a number of pollutants like

1. chlorofluorocarbons 2. sulphur dioxide 3. methylchloroform 3. fertilizers

65. Who among the following got the Nobel Prize in 1962 for developing the double helix model of DNA ? 1. Watson 2. Crick

3. Wilkins 4. Franklin

66. Types of fowls with their correct identification are 1. rooster (mature female fowl)

2. cockerel (young male fowl) 3. pullet (young male fowl)

4. layers (female fowls raised for egg production) 67. Human immunodeficiency virus (HIV) 1. is a retrovirus having rounded outline

2. causes slim diseases which is characterised by reduction in the number of helper T-lymphocyte 3. can only survive in body fluids like blood,-semen

vaginal secretion etc

4. is transmitted through Aedes mosquito 68. Effects of nicotine on human body include

1. release of adrenaline and hence increased blood pressure and heart beat

2. decreased foetal growth

3. stimulation of nerve impulse and muscle contraction 4. increased foetal growth

69. Trochophore larva is found in 1. porifera 2. annelida 3. coelenterata 4. mollusca

70. Which of the following statement is/are true for

Paramecium ?

1. posterior contractile vacuole works more frequently 2. cytophyge or cytoproct is meant for egestion 3. 2 contractile vacuoles work alternately

4. anterior contractile vacuole works more frequently 71. NMR is considered better than CT scan in

1. using ionising radiations 2. not using ionising radiation

3. ability to obtain images in vertical plane only 4. study of tissue metabolism

72. Which of the following layers are collectively called stratum malpighii ?

1. stratum spinosum 2. stratum basale 3. stratum Iucidum 4. stratum granulosum 73. Which of the following hormone are secreted by epithelium of duodenum ?

1. duocrinin 2. enterogastron 3. cholecystokinin

4. gastric inhibitory peptide

74. The stains which generally used for chromosomes are

1. acetocarmine 2. crystal violet 3. sudan III and IV 4. aniline blue 75. Microbodies differ from mitochondria in

1. single membrane 2. absence of DNA 3. direct oxidation

4. present in the cell cytoplasm 76. In Dryopteris

1. sporophyte is parasitic over gametophyte 2. sporophyte is independent

3. gametophyte is dependent on sporophyte 4. gametophyte is independent

77. Selaginella shows

1. heterospory 2. heterophylly 3. ligulate leaves 4. homospory

78. Which of the following conditions are necessary for the growth of the moulds, Mucor or Penicillium ?

1. warmth 2. carbohydrates 3. water 4. light

79. Rhodophyceae exhibit the following characters 1. plant body is divided into hold fast, stipe and lamina 2. flask shaped receptive neck called trichogyne 3. reserve food is laminarin and mannitol 4. external fertilization by nonflagellate spermatia 80. Examples of mitotic poisons are

1. azides 2. steroids 3. chalones 4. cytokinin 81. Variations appear during meiosis due to

1. crossing over 2. independent assortment 3. seggregation 4. linkage

82. The diseases that result due to trisomy are 1. Down's syndrome 2. Turners syndrome 3. Patau's syndrome 4. Cri du chat syndrome 83. Restriction endonucleases are capable of 1. creating sticky ends

2. breaking DNA at specific sites 3. causing crossing over

4. breaking DNA at any sites

84. Which of one the following includes total root parasite ?

1. Orobanche 2. Rafflesia

3. Balanophora 4. Cuscula 85. Select the correct matches.

1. interpetiolar stipules - kadam 2. bud scales - banyan 3. pulvinus leaf base - l e g u m e s 4. phylloclade - Eichhornia 86. Hypanthodium inflorescence

1. has a flask shaped receptacle has saucer shaped receptacle

bears male, female and sterile female flowers consists of involucre of 5 fused bracts 2.

3. 4. 87. edible ?

In which of the following fruits, is the whole fruit

1. 3. 4. 2. 3. 4. 8 9 .

Carica papaya 2. Capsicum frutescens Musa paradisica

Abelmoschus esculentus

The diagonastic features of Fabaceae family are fruit legume

flowers papilionaceous

androecium generally didelphous corolla plicate in bud condition Latex vessels are found in

Calotropis 2. Heavea Oleander 4. Papaya

90. What is true about heart wood ? 1. it is made up of degenerated cells

it does not help in water transport it is also termed alburnum it is soft and undurable

From the following equations choose the ones that represent nitrogen fixation.

nitrogenase

3..

2. 3. 4. 91 1. N , + 3 H , 2 N H , 2. 3. 4. 92 1. 2. 3. 4. 93 1. 2. 3. 4. 2 ' 3 2 N 03 2 N O , 2 N O N20 N , N2Os + H20 2 H N 03 NH+ + 2 0 , NO, + 2 H , 0 + energy Photorespiration is stimulated by high light intensity

high oxygen concentration high temperature

high C 02 concentration CAM plants show

calvin cycle occurring during night scotoactive stomata

release of C 02 during night formation of malic acid during dark

94. Which of the following are examples of proto- cooperation type of biotic interaction ?

1. crocodile bird eats leeches inside th« mouth of crocodile

2. cattle egret feeds on lice of cattle

3. Rhizobium and root of nodulated legumes 4. sea anemone and hermit crab

95. The nonmetallic minerals that are used as ceramics 1. corundum 2. asbestos

3. fluorspar 4. feldspar

96. Pomalin. which is effective in increasing apple size is a combination of

1. cytokinin 2. gibberellin 3. auxin 4. ethylene

97. Given below are few pesticides and their examples. Select the incorrect match from the following.

1. fungicides - copper sulphate 2. rodenticides - methyl bromide 3. insecticides - triazines 4. herbicide - carbamates

98. Which of the following terms are associated with tissue culture process ?

1. callus 2. embryoids 3. explant 4. scion

99. The inhibitors of electron transport chain are 1. antimycin A 2. 2-4-dinitrophenol 3. cyanide 4. morphactin 100. Tropical evergreen rain forests shows

1. maximum diversity 2. maximum productivity 3. rapid nutrient cycling

4. rainfall of 90 - 10cm

ANSWERS

1. (b) 7. (c) 13.(b) 19. (b) 25. (b) 31. (a) 37. (c) 43.(d) 49. (a) 55. (c) 61.(b) 67. (a) 73.(d) 79. (c) 85. (a) 91.(d) 97. (a) 2. (a) 8. (d) 14. (c) 20. (d) 26. (d) 32. (b) 38. (d) 44. (a) 50. (d) 56. (b) 62. (c) 68. (b) 74.(b) 80.(d) 86.(d) 92. (a) 98. (a) 3. (a) 9. (a) 15. (c) 21.(b) 27. (a) 33. (a) 39. (d) 45.(d) 51.(c) 57. (c) 63.(b) 69. (c) 75.(a) 81.(b) 87. (c) 93. (c) 99. (d) 4. (c) 10.(b) 16.(b) 22. (b) 28. (c) 34. (b) 40. (a) 46. (c) 52. (a) 58. (a) 64. (a) 70.(b) 76.(c) 82. (d) 88. (a) 94.(b) 100.(a) 5. (a) l l . ( c ) 17. (c) 23.(c) 29.(b) 35. (d) 41.(c) 47. (c) 53.(d) 59. (d) 65.(a) 71.(c) 77. (a) 83.(b) 89. (c) 95.(c) 6. (a) 12. (c) 18. (d) 24. (d) 30. (a) 36. (b) 42. (d) 48. (b) 54. (a) 60.(a) 66. (c) 72.(b) 78. (a) 84. (a) 90.(b) 96.(b)

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1. In human pregnancy the urine contains very large amounts of gonadotropic material which is formed in the placenta and is therefore called

(a) HCG (b) LH (c) progesterone (d) relaxin.

2. Which one of the following statements concerning the binding of oxygen by haemoglobin is correct ?

(a) the Bohr effect results in a lower affinity for oxygen at higher pH values

(b) carbon dioxide increases the oxygen affinity of haemoglobin by binding to the amino terminal groups of the polypeptide chains

(d) oxyhaemoglobin and deoxyhaemoglobin have the same affinity for protons (H+).

3. In the absence of the bile salts, glycocholic and taurocholic acid, the intestinal absorption of all of the following would be impeded except

(a) riboflavin (b) oleic acid (c) cholesterol (d) vitamin A.

4. Which one of the following is synthesized from an essential amino acid ?

(a) tyrosine (b) alanine (c) proline (d) glutamate.

5. In which one of the following tissues is glucose transport into the cell enhanced by insulin ?

(a) brain (b) lens

(a) is a water soluble vitamin

(b) is synthesized by intestinal bacteria

haemorrhagic disease.

7. Certain types of granulocytes (white blood cells) in the blood ingest bacteria and debris. This function is most likely to occur by

(a) exocytosis (b) passive transport (c) phagocytosis (d) pinocytosis.

ANSWERS

8. When looking at the cross section of the human tissue, one finds the red marrow in the

(a) medullary cavity (b) cancellous bone (c) periosteum (d) epiphysis.

9. The part of the human brain which is an important relay station for the sensory impulses and also is the origin of many of the involuntary acts of the eye such as the narrowing of the pupil in bright light, is the

(a) hypothalamus (b) midbrain (c) corpus callosum (d) cerebellum. 10. The resting potential of a neuron is dependent on which two ions ?

(a) lead and calcium ions (b) calcium and phosphate ions (c) sodium and potassium ions (d) potassium and phosphate ions.

11. The phase of contraction of muscle occurs when (a) tropomyosin binds and releases actin

(b) myosin binds and releases actin (c) actin binds and releases myosin (d) none of the above.

12. The valve between the right ventricle and the pulmonary artery is the

(a) mitral valve (b) semilunar valve (c) bicuspid valve (d) tricuspid valve. 13. The primary factor that regulates erythropoietic activity is

(a) the kidney (b) erythropoietin (c) oxygen (d) bone marrow. 14. Cells that bear the CD4 surface antigen participate in (a) HIV infection (b) phagocytosis (c) antigen presentation for immune responses (d) all of the above.

15. First step in activation of ovum during process of fertilization is

(a) formation of fertilization membrane (b) fcrtilizin-antifertilizin reaction (c) penetration of sperm in ovum (d) formation of fertilization cone.

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