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MHTCET Biology Page 2
Biology

Column A Column B Column C i) Coenozoic 2 โ€“ 65 mya Origin of vertebrates ii) Palaeozoic 500 โ€“ 165 mya Rise of egg laying mammals iii) Mesozoic 135 โ€“ 225 mya Reptiles dominant iv) Proterozoic 350 โ€“ 500 mya Trilobites dominant The correct match of Columns A, B and C is A) i B) ii C) iii D) iv

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Correct option:(C) Solution: Coenozoic era (65 million years ago) is also known as โ€œage of mammalsโ€. It rise of first placental mammals, their diversification and evolution. Palaeozoic era is marked...

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Select the correct match : I II III i) Monocyte a) Large round nucleus l) Antihistamine property ii) Lymphocyte b) Twisted nucleus m) Release heparin iii) Basophil c) Bilobed nucleus n) Phagocytic iv) Eosinophil d) Kidney shaped nucleus o) Produce antibodies A) i โ€“ d โ€“ n, ii โ€“ a โ€“ o, iii โ€“ b โ€“ m, iv โ€“ c โ€“ l B) i โ€“ b โ€“ m, ii โ€“ a โ€“ l, iii โ€“ c โ€“ n, iv โ€“ d โ€“ o C) i โ€“ c โ€“ n, ii โ€“ b โ€“ o, iii โ€“ d โ€“ m, iv โ€“ a โ€“ l D) i โ€“ a โ€“ o, ii โ€“ d โ€“ m, iii โ€“ c โ€“ l, iv โ€“ b โ€“ n

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Correct option:(A) i โ€“ d โ€“ n, ii โ€“ a โ€“ o, iii โ€“ b โ€“ m, iv โ€“ c โ€“ l Solution: White blood cells are of broadly divided into two types, agranulocytes and granulocytes. Granulocytes are divided into...

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Select the correct match : I II i) Competition a) Tapeworm and man ii) Commensalism b) Lichen iii) Mutualism c) Cattle egret and cattle iv) Parasitism d) Lions and Leopards A) i โ€“ d, ii โ€“ c, iii โ€“ b, iv โ€“ a B) i โ€“ d, ii โ€“ b, iii โ€“ c, iv โ€“ a C) i โ€“ c, ii โ€“ b, iii โ€“ d, iv โ€“ a D) i โ€“ a, ii โ€“ b, iii โ€“ d, iv โ€“ c

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Correct option:(A)i โ€“ d, ii โ€“ c, iii โ€“ b, iv โ€“ a Solution: Five types of interaction between different organisms in an ecological communities. These are competition, commensalism, mutualism,...

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Which of the following is the WRONG match between the plant and its character for adaptation of cross pollination ? A) Zostera โ†’ Bright coloured flowers with nectar B) Bougainvillea โ†’ Petaloid bracts C) Passion flower โ†’ Corona D) Adansonia โ†’ Copious nectar

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Correct option:(A)Zostera โ†’ Bright coloured flowers with nectar Solution: Zostera is a submerged water plant. Cross pollination occurs with the help of water. Petaloid bracts are modified...

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Given below are some antibiotics and their microbial source. Match the correct pairs. 1) Chloromycetin a) Streptomyces griseus 2) Erythromycin b) Penicillium chrysogenum 3) Penicillin c) Streptomyces erythreus 4) Streptomycin d) Streptomyces venezuelae A) 1 โ€“ a, 2 โ€“ b, 3 โ€“ c, 4 โ€“ d B) 1 โ€“ d, 2 โ€“ c, 3 โ€“ b, 4 โ€“ a C) 1 โ€“ b, 2 โ€“ d, 3 โ€“ a, 4 โ€“ c D) 1 โ€“ c, 2 โ€“ a, 3 โ€“ d, 4 โ€“ b

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Correct option:(B)1 โ€“ d, 2 โ€“ c, 3 โ€“ b, 4 โ€“ a Solution: Chloromycetin is obtained from Streptomyces venezuelae. Erythromycin is obtained from Streptomyces erythreus. Penicillin is obtained...

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Remarkable increase in rice production from 35 million tones to 89.5 million tones during 1960 โ€“ 2000 was mainly due to __________ A) Improved semidwarf varieties B) Introduction of Golden rice C) Increased use of chemical fertilizers D) Cultivation of wild varieties

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Correct option:(A) Improved semidwarf varieties Solution: From 1960-2000 introduction of m IR-8 and Taichung Native-1 varieties of rice in 1966 resulted in a tremendous increase in rice production....

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Match the plant and the part in relation to Vegetative Propagation. 1) Dahlia a) Eyes 2) Solanum tuberosum b) Runner 3) Begonia c) Fasciculated tuberous roots 4) Cynodon d) Epiphyllous buds A) (1) โ€“ c, (2) โ€“ a, (3) โ€“ b, (4) โ€“ d B) (1) โ€“ d, (2) โ€“ a, (3) โ€“ b, (4) โ€“ c C) (1) โ€“ c, (2) โ€“ a, (3) โ€“ d, (4) โ€“ b D) (1) โ€“ b, (2) โ€“ c, (3) โ€“ a, (4) โ€“ d

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Correct option:(C)(1) โ€“ c, (2) โ€“ a, (3) โ€“ d, (4) โ€“ b Solution: Dahlia plant is propagated by fasciculated tuberous roots. Solanum tuberosum is potato. It is propagated with the help of eyes in...

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Which one of the following is the CORRECT order of conversion of waste materials during biogas formation ? A) Monomers โ†’ polymers โ†’ methane โ†’ organic acids B) Organic acids โ†’ methane โ†’ polymers โ†’ monomers C) Methane โ†’ organic acids โ†’ polymers โ†’ monomers D) Polymers โ†’ monomers โ†’ organic acids โ†’ methane

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Correct option:(D)Polymers โ†’ monomers โ†’ organic acids โ†’ methane Solution: Biogas is made up of microbial degradation of organic matter under anaerobic conditions. Organic matter is present in the...

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A cross between two pea plants tall with axial flowers and dwarf with terminal flowers produced offsprings tall with axial flowers and tall with terminal flowers in the ratio 1 : 1. What will be the genotype of parents ? A) TTAa ร— ttaa B) TtAa ร— ttaa C) TtAA ร— ttaa D) TTAA ร— ttaa

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Correct option:(A)TTAa ร— ttaa Solution: Alleles for tallness (T) and axial flower (A) are dominant over that of dwarfism (t) and terminal flower (a) . Since recessive traits are exhibited in...

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Identify the INCORRECT statement from the following with reference to lac operon. A) It is a unit of gene expression and regulation for lactose sugar metabolism in E. Coli. B) Lactose sugar enters the cell due to the activity of enzyme permease. C) Operators are present between promoters and structural genes. D) The structural gene โ€˜zโ€™ codes for ฮฒ -galactosidase, โ€˜yโ€™ for transacetylase and โ€˜aโ€™ for permease.

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Correct option:(D)The structural gene โ€˜zโ€™ codes for ฮฒ -galactosidase, โ€˜yโ€™ for transacetylase and โ€˜aโ€™ for permease. Solution: Lac operon is an operon which is involved in the regulation of...

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Q39) Given below are some reactions and the enzymes involved. Identify the CORRECT pairs. I II 1. Fructose 1,6 diphosphate โ†’ 3 PGAL + DHAP a. enolase 2. Citrate โ†’ Cis โ€“ aconitate b. thiokinase 3. Succinyl Co. A โ†’ succinate c. aconitase 4. 2 PGA โ†’ PEPA d. aldolase A) 1-d, 2-c, 3-b, 4-a B) 1-a, 2-b, 3-c, 4-d C) 1-b, 2-a, 3-d, 4-c D) 1-c, 2-d, 3-a, 4-b

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Correct option:ย  A Explanation: Fructose 1,6 diphosphate โ†’ 3 PGAL + DHAPย ย  is related to aldolase. Alodolase is an enzyme which helps the body to break down sugar to produce energy. Citrate โ†’ Cis โ€“...

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Q35) In processing of eukaryotic hnRNA, during protein synthesis tailing involves __________ of RNA. A) Addition of adenylate residues at 3โ€ฒ end B) Addition of methyl guanosine triphosphate at 3โ€ฒ end C) Addition of methyl guanosine triphosphate at 5โ€ฒ end D) Removal of introns

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Correct option:ย ย  A Explanation: Eukaryotic hnRNA, undergoes slicing, capping and talking to form mRNA, which undergoes synthesis of proteins. Tailing involves the addition of adenylate residues at...

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Q12) The gymnospermic endosperm differs from an angiospermic endosperm because in gymnosperm it is A) haploid and developed from female gametophyte B) diploid and developed from female gametophyte C) triploid and developed after fertilization D) triploid and developed before fertilization

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Correct option:ย  A Explanation: ย The gymnospermic endosperm differs from an angiospermic endosperm because in gymnosperm it is the endosperm is haploid and developed from female gametophyte.

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Identify the WRONG statement regarding the process in sewage treatment (1) Primary treatment is a physical process (2) Secondary treatment is a biological process (3) The BOD of effluent increases after secondary treatment (4) The tanks used for tertiary treatment are anaerobic sludge digesters

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Correct option:(3)The BOD of effluent increases after secondary treatment Solution: The BOD of eluent decreases are secondary treatment as bacteria decompose most of the organic matter in the...

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Which of the following is NOT correct regarding plasmids ? (1) They are small, extra chromosomal circular form of DNA (2) They are naturally found in bacteria only (3) They are ‘replicons’ capable of autonomous replication within a suitable host (4) They carry genes related to survival and reproduction of carrier bacterium under unfavourable conditions

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Correct option:(3)They are 'replicons' capable of autonomous replication within a suitable host Solution: Plasmids are small, circular, extrachromosomal DNA which are able to self replicate. They...

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In plants, Richmond-Lang effect is (1) Delaying the onset of senescence by application of cytokinin (2) Prevention of abscission of leaves and flowers by auxin application (3) Increasing commercial value of leafy vegetables by inducing leaf expansion through gibberellin application (4) Breaking dormancy of seeds and buds through application of ethylene

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Correct option:(3)Increasing commercial value of leafy vegetables by inducing leaf expansion through gibberellin application Solution: Cytokinins delays the onset of senescence by application of...

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