61. What is incineration?
(a) It is controlled aerobic combustion of wastes inside chambers at temperature 900-1300°C.
(b) It is anaerobic combustion inside chambers at a temperature of 1650°C.
(c) It is piling of waste on selected low lying land.
(d) None of these.
62. Which among the following is a type of negative interaction?
(a) Scavenging (b) Mutualism
(c) Commensalism (d) Predation
63. Which of the following statements is not true?
(a) Genotype is the external feature of an organism.
(b) Trait is the distinguishing feature of a character.
(c) Alleles form a pair of contrasting characters.
(d) Character is a well defined morphological or physiological feature of an organism
64. Which of the following statements is not true about genetically modified plants?
(a) They are more tolerant to abiotic stresses.
(b) They have enhanced nutritional value.
(c) They have increased efficiency of mineral usage.
(d) They have increased reliance on chemical pesticides
65. Which of the following statements is correct regarding structure given in the figure?
(a) It is the strongest cartilage and has abundant white fibres.
(b) It contains clear large amount of translucent, slightly elastic matrix with less fibres.
(c) Its matrix contains numerous yellow fibres which form a network by uniting with one another.
(d) All of these
(a) x-normal enzyme reaction, y-competitive inhibition, z-non-competitive inhibition
(b) x-enzyme with an allosteric modulator added, y-normal enzyme activity, z-competitive inhibition
(c) x-enzyme with an allosteric stimulator, y-competitive inhibition added z-normal enzyme reaction
(d) x-normal enzyme reaction, y-non-competitive inhibitor added z-allosteric inhibitor added
67. Which of the following statements is not true?
(a) Some species of green algae are epiphytic.
(b) The red colour of red algae is due to phycoerythrin.
(c) The food reserve of brown algae is floridean starch.
(d) The examples of some red algae are Porphyra, Gelidium and Polysiphonia, etc
68. Which of the following statement(s) is/are correct regarding habitat?
(i) It is a specific physical place or locality occupied by an organism, population or community.
(ii) It is formed of both abiotic components and biotic components of a specific area.
(iii) It may be as small as burrow, bark of tree or intestine of ant, but may be as large as pond, lake, river, forest, grassland, etc.
(iv) It is generally occupied by the entire community e.g., a pond with many individuals of different species showing cohabitation.
(a) (i) and (ii) (b) (iv) only
(c) (i), (ii) and (iii) (d) (i), (ii), (iii) and (iv)
69. Select the plants generally found in reed swamp stage of hydrosere.
(a) Trapa, Monochoria, Aponogeton
(b) Sagittaria, Typha, Scirpus
(c) Hydrilla, Vallisneria
(d) Carex, Juncus, Cyperus
70. Select the wrong statement out of following.
(a) Endoplasmic reticulum acts as means of intracellular transport.
(b) Mitochondria are miniature biochemical factories where food stuff is completely oxidized to carbon dioxide and water.
(c) Chloroplasts are able to trap sun energy and change it into chemical energy.
(d) Microfilaments constitute spindle fibres, chromosome fibres, centrioles, basal bodies and flagella.
71. Select the correct statement about parotid glands.
(a) They are smallest salivary glands and are located breath the tongue.
(b) They are medium sized salivary glands and are located at the angles of lower jaw.
(c) They are largest salivary glands and their ducts open into the oral cavity near the upper molars.
(d) None of these.
72. Select the stage which shows Anaphase – II
73. Which of the following statements is incorrect?
(a) Root pressure is the pressure developed in the tracherary elements of xylem due to metabolic activities of root.
(b) Osmotic pressure is the pressure required to completely stop the entry of water into an osmotically active solution across a semipermeable membrane.
(c) Swelling of the protoplast of a cell is under the influence of a hypertonic solution is called plasmolysis.
(d) Imbibition is the phenomenon of adsorption of water or any other liquid by the solid particles of a substance without forming a solution
74. The figure shows the carbon dioxide fixation in C4 dicarboxylic acid pathway. Identify X, Y and Z.
(a) X – Pyruvate, Y – Phosphoenol pyruvate, Z – Oxalo acetate
(b) X – Oxaloacetate, Y – Pyruvate, Z – Phosphoenol pyruvate
(c) X – Phosphoenol Pyruvate, Y – Pyruvate, Z – Oxaloacetate
(d) X – Oxaloacetate, Y – Phosphoenol Pyruvate, Z – Pyruvate
75. Select the incorrect statement out of following.
(a) Fermentation takes place under anaerobic conditions in many prokaryotes and unicellular eukaryotes.
(b) The respiratory quotient depends upon the type of respiratory substrate used during respiration.
(c) The reactions catalyzed by pyruvic dehydrogenase require the participation of several coenzymes including NAD+, coenzyme A and magnesium ions.
(d) When fats are used in respiration, the RQ is more than 1
76. Receptors related to pressure are
(a) Meissner’s corpuscle (b) Pacinian corpuscles (c) Ruffini’s corpuscles (d) all of these
77. Which of the following fish was introduced in India by foreigners?
(a) Pomphret (b) Mystus singhala
(c) Labeorohita (d) Clarius batrachus
78. Which one of the following proved effective for biological control of nematodal diseases in plants?
(a) Gliocladium virens (b) Paecilomyces lilacinus
(c) Pisolithus tinctorius (d) Pseudomonas cepacia.
79. Which is true about plasmids?
(a) Plasmids are circular double-stranded DNA molecules which are extrachromosomal and self-replicating.
(b) They are used as vector for cloning purposes in bacteria.
(c) Plasmid molecule may be present in multiple copies inside the host organism.
(d) All of these
80. Populations are said to be allopatric when
(a) they are physically isolated by natural barriers
(b) they are sharing the same area but cannot interbreed
(c) they live together and breed freely to produce viable offspring
(d) they are isolated but often come together for breeding
81. Darwin’s finches are an example of
(a) polymorphism (b) connecting links (c) adaptive radiation (d) both (a) and (c).
82. Select the correct option with the name of the drug yielding plant with their family and drug yielding part
84. Which of the following statements is not true about biodiversity?
(a) Biodiversity is used to describe diversity at all levels of biological organization ranging from macromolecules inside the cells to biomes.
(b) Genetic diversity is the diversity in the numbers and types of genes as well as chromosomes present in different species and the variation in the genes and their alleles in the same species.
(c) Species diversity is the variety in the number and richness of the species of a region.
(d) As the enviornment become diversified genetic diversity with in a species decreases
85. Read the following statements and select the correct option.
A. General characteristics of ornithophilous flowers are their tubular, cup-shaped or urn-shaped form, bright colour, large quantities of pollen and plenty of nectar.
B. Pollination by ants is called malacophily.
C. Bats carry out pollination in Adansonia and Kigelia.
D. The most common insects pollinators are moths, flies, butterflies, wasps, bees, bettles, etc.
(a) B and C are wrong (b) B alone is wrong
(c) C alone is wrong (d) C and D are wrong
86. Identify the set of primary pollutants of the air.
(a) C02, CO, NO, aldehydes, PAN
(b) C02, CO, photochemical smog
(c) C02, CO, NO, sulphur oxides, fluorides, particulate matter
(d) All of the above
87. Which of the following statements is incorrect?
(a) Bryophytes are called amphibians of the plant kingdom because these plants can live in soil, but are dependent on water for sexual reproduction.
(b) The predominant stage of the life cycle of a moss is the gametophyte.
(c) The leaves in pteridophyta are small as in Selaginella or large as in ferns.
(d) The Selaginella and Salvinia produce spores of one kind, such plants are called homosporous.
88. The following figure shows characteristics of chordata.
Identify them and select the correct option.
(a) A – Notochord, B – Nerve cord, C – Gill slits, D – Post- anal part
(b) A – Nerve cord, B – Notochord, C – Gill slits, D – Post- anal part
(c) A – Notochord, B – Gill slits, C – Nerve cord, D – Post- anal part
(d) A – Notochord, B – Post-anal part, C – Gill slits, D – Nerve cord.
89. When both ovaries are removed from rat then which hormone is decreased in blood?
(a) oxytocin (b) prolactin
(d) gonadotropin releasing factor.
90. Pick out wrong statement out of the following.
(a) Asteraceae family has bracteate flower, 5 sepals, 5 petals, 5 stamens and gynoecium is bicarpellary and syncarpous.
(b) Fruit of the fabaceae family is called legume.
(c) Cucurbitaceae family has ebracteate flower, 5 sepals, 5 petals and gynoecium is tricarpellary and syncarpous.
(d) Fruit of the liliaceae family is called cypsella.