A country with several different habitat types is said to have a high degree of
1.Genetic diversity
2.Species diversity
3.Biodiversity
4.Habitat diversity
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A phenomenon occurring during prophase I of meiosis is
1.Mutation
2. Synapsis
3. Translation
4.Crossing over
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Arenes do not show
1.Delocalisation of pi-electrons
2.Greater stability
3.Resonance
4.Electrophilic additions
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Assimilatory or photosynthetic roots are present in
1.Tinospora
2. Trapa
3.Taeniophyllum
4.All of the above
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 A few protists possess structures to regulate their water content. They are
1.membranes
2.Chromatophores
3.Nuclei
4.Contractile vacuoles
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 Clinging roots are found in
1.Podostemon
2.Orchid
3.Trapa
4.Screwpine
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 Component of plant cell absent in animal cell is
1. Cytoplasm
2.Cell membrane
3. Cell wall
4.Nucleus
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 If the centromere is located at the proximity of the end of a chromosome; it is known as
1.Acrocentric
2.Metacentric
3.Telocentric
4.Submetacentric
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 In Angiosperms; the functional megaspore gives rise to
1. ovule
2.embryo
3.embryo sac
4.endosperm
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 In Chlorination of benzene; which of the following acts as an electrophile?
1. Cl+
2.Cl–
3. Cl
4.FeCl3
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 Protists include
1.Bacteria; fungi; algae and Bryophyta
2. Protozoa; algae and fungi
3.Vascular plants; slime moulds; and fungi
4.Bacteria; algae; protozoa; and Bryophyta
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 The product formed predominantly in the reaction of toluene with chlorine in the presence of FeCl3 is
1.m-chlorotoluene
2.o- and p-chlorotoluene
3.Benzoyl chloride
4.Benzyl chloride
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 Trade name of genetically engineered insulin is
1.Beta insulin
2.Humilin
3.Anulin
4.Gilbert’s insulin
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 Whorling whips are named so because of
1.Type of nucleus
2.Mode of movement
3.Mode of reproduction
4.Mode of nutrition
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Balbiani rings are the sites of
1.RNA and protein synthesis
2.Lipid synthesis
3.Nucleotide synthesis
4.Polysaccharide synthesis
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Crossing over refers to
1.thickening of chromosome
2.change in chromosome
3.Mutation
4.exchange of segments between sections of chromosome
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Find the true statement about benzene
1. it possesses two types of C-C bonds
2.three isomeric forms are possible in a monosubstituted benzene
3. it readily undergoes addition due to unsaturation
4.pi-electrons are delocalised in the ring
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Flagella; centrioles; cilia and basal bodies possess evident similar structural elements and arrangements. This can lead to this probable hypothesis
1. Loss of basal bodies should lead to loss of all cilia; flagella; and centrioles
2.Disruption of one of these types of the structure should necessarily disrupt each of the others as well
3.Natural selection for motility must select for microtubular arrays in circular patterns
4.Motor proteins such as dynein must have evolved before any of these four kinds of structure
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In Dinoflagellates; the reserve food is
1. Fucoxanthin
2.Starch
3.Alginic acid
4.Mannitol
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In the plasma membrane of a few animals; the presence of cholesterol
1.makes the membrane less flexible permitting it to sustain greater pressure from within the cell
2. enables the membrane to stay fluid more easily when the temperature of the cell drops
3.enables the animal to remove hydrogen atoms from saturated phospholipids
4.enables the animal to add hydrogen atoms to unsaturated phospholipids
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Increasing genetic diversity interprets daughter chromosome contains genes from
1. None of the parents
2.Single parent
3.Both parents
4.synthesis of own genes
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 ‘Curled toe paralysis’ in chicks is a symptom caused due to the deficiency of
1.Phosphorous
2.Sulphur
3.Niacin
4.Riboflavin
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Micronucleus and macronucleus are the characteristic features of
1.Balantidium and Hydra
2.Vorticella and Nyctotherus
3.Opalina and Nyctotherus
4.Vorticella and Paramecium
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Name the non-membrane bound organelle exclusively found only in animal cell
1.Sphaerosome
2.Glyoxisome
3. Centriole
4.Peroxisome
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Nitration of benzene is carried out by which of the following reactive species?
1.NO2+
2.NO2–
3.HNO3
4.NO3
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Pick the wrong statement
1.Diatoms are primarily produced in the oceans
2.Diatoms are microscopic and float passively in the water
3.Walls of diatoms are destructible easily
4.Diatomaceous earth is formed by the cell walls of diatoms
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Red tide is caused by
1.Noctiluca
2.Ceratium
3. Gonyaulax
4.All of the above
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Roots developing from a part of the plant other than radicle are called
1. Fibrous
2.Adventitious
3.Epicaulous
4.Epiphyllous
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Roots of which of the following plants contains an oxidising agent?
1.Soybean
2.Radish
3.Mustard
4.Carrot
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State the way in which increasing species diversity can affect the ecosystem
1. it does not increase the efficiency and productivity of an ecosystem
2.it increases only the efficiency and not the productivity of an ecosystem
3. it increases the productivity and efficiency of an ecosystem
4.it only increases the productivity of an ecosystem
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The association of more than one ribosome with a single molecule of mRNA complex is known as
1. Polysome
2. Polysome
3.Polymer
4.Polysaccharide
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The cell walls form two thin overlapping shells in which group of organisms such that they fit together
1.Euglenoids
2.Dinoflagellates
3.Slime moulds
4.Chrysophytes
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The fleshy evident mass found between the forelimbs of cows is known as
1.Rump
2. Flank
3. Brisket
4.Dewlap
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The main site of different types of cellular activities is
1. Mitochondrion
2.Nucleus
3.Cytoplasm
4. Plasma membrane
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The protist that reproduces both by binary fission and conjugation is
1.Amoeba
2.Euglena
3.Paramecium
4.Monocystis
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The protistan genome has
1.Free nucleic acid aggregates
2.Membrane-bound nucleoproteins embedded in the cytoplasm
3.Gene containing nucleoproteins condensed together in a loose mass
4.nucleoprotein in direct contact with cell substance
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This biodiversity boosts the oxygen availability
1.Ecosystem diversity
2. Species diversity
3. Genetic diversity
4. Cell diversity
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This cell organelle is responsible to extract energy from carbohydrates to form ATP
1. Mitochondrion
2.Lysosome
3.Ribosome
4.Chloroplast
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This is the importance of species diversity
1.species interacts with its environment and hence performs some functions
2.species never interact with the environment
3. species minimize interaction with its environment and hence performs certain functions
4.species does not perform functions though it interacts with the environment
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This organism is not an example of eukaryotic cells
1.Euglena viridis
2.Escherichia coli
3.Amoeba proteus
4.Paramoecium caudatum
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What is the consequence of a change in the genetic diversity
1.results in loss of biological diversity
2.leads to an increase in the population
3. results in loss of human species only
4.causes pollution
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Where do you find velamen?
1.in roots of screwpine
2.in aerial roots of orchids
3. in leaves of Ficus
4. in aerial and terrestrial roots of orchids
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Which of the following groups are most likely to be o; p directing?
1.Deactivating
2.Neutral
3.Activating
4.All of the above
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Which of the following has buttress roots?
1.Banyan
2.Sorghum
3. Pandanus
4. Terminalia
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Which of the following is a geocarpic fruit?
1.Garlic
2.Onion
3. Potato
4.Peanut
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Which of the following is an edible modified root?
1.Potato
2.Sweet potato
3. Groundnut
4.both (a) and (b)
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Which of the following is homologous with sweet potato?
1.Potato
2.Colocasia
3.Turnip
4.Ginger
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Which of the following plants has stilt roots?
1. Bryophyllum
2.Radish
3. Pandanus
4.Mango
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Which of the following will not undergo Friedel-Craft’s reaction readily?
1.Toluene
2.Xylene
3.Cumene
4.Nitrobenzene
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Why does genetic diversity have a major role in the adaptability and survival of a species?
1.any population should remain the same regardless of the outer change in the environment
2.Ability of population to adapt to changing environment
3.Environment remains unchanged even if the population changes
4.Population inability to adapt to changing environment
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