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[Type text] Page 1 SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL. 99655-31727, 8072992139, SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL SAKKARAMPALAYAM , AGARAM (PO) ELACHIPALAYAM TIRUCHENGODE(TK), NAMAKKAL (DT) PIN-637202 Cell : 99655-31727, 94432-31727 COMMON QUARTERLY EXAMINATION 2018 STD: XI 14.09.2018 SUBJECT: BIO- ZOOLOGY ANSWER KEY MARKS : 70 Q. NO ANSWER KEY MARKS SECTION -I 1. c)Earnest Hackel 1 2. c)Enterobius -Hook worm 1 3. d)Conjugated protein 1 4. d)As the frog’s fertilization is internal large number of tadpoles are formed 1 5. 1 2 3 4 b) ii iii iv i 1 6. d)12-16 times/minutes 1 7. a)insulin synthesis 1 8. a)Both Assertion and Reason are correct. 1 SECTION -II 9. Probiotic bacteria; Beneficial bacteria. Eg: Bacterial present in curd. Cyanobacteria produce O2 Pathogenic bacteria Disease Causing bacteria Eg: Bacterial causing cholera. (Vibrio cholera) 1 1 10. Pulsatile flow of blood through the arteries Passive recoil of the lungs following inspiration 1 1 11. Two sex organs nature at different times Sperm develops earlier than the production of Ova 1 1 12. It helps to maintain food chain and our eco system It feed on insects and helps in reducing insect pest population 1 1 13. Because of complete partition of all the chambers. (Auricles and ventricles) in the heart 2 14. Vital capacity (VC) = Expiratory Reserve Volume(ERV)+Tidal Volume (TV) + Inspiratory Reserve Volume (IRV) =(ERV) + (TV) + (IRV) = 1100 + 7000 + 3000 1 1 VC = 11100 www.Padasalai.Ne www.Padasalai.Ne www.Padasalai.Ne www.Padasalai.Ne www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasal ww.Padasalai.Net ww.Padasalai.Net ww.Padasalai.Net ww.Padasalai.Net ww.Padasal www.Padasalai.N www.Padasalai.N www.Padasalai.N www.Padasalai.N www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasalai.Net www.Padasala ww.Padasalai.Net ww.Padasalai.Net ww.Padasalai.Net ww.Padasalai.Net ww.Padasala www.Padasalai.Net www.TrbTnpsc.com http://www.trbtnpsc.com/2017/10/11th-quarterly-exam-question-papers-and-answer-keys-download.html
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99655-31727, 94432-31727 - plusonestudymaterials...Sep 11, 2018  · [Type text] Page 2 SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL. 99655-31727, 8072992139, SECTION -III 15. DNA Barcoding

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  • [Type text] Page 1

    SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL. 99655-31727, 8072992139,

    SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL

    SAKKARAMPALAYAM , AGARAM (PO) ELACHIPALAYAM

    TIRUCHENGODE(TK), NAMAKKAL (DT) PIN-637202

    Cell : 99655-31727, 94432-31727

    COMMON QUARTERLY EXAMINATION 2018

    STD: XI 14.09.2018

    SUBJECT: BIO- ZOOLOGY ANSWER KEY MARKS : 70

    Q. NO ANSWER KEY MARKS

    SECTION -I

    1. c)Earnest Hackel 1

    2. c)Enterobius -Hook worm 1

    3. d)Conjugated protein 1

    4. d)As the frog’s fertilization is internal large number of tadpoles are formed 1

    5. 1 2 3 4 b) ii iii iv i

    1

    6. d)12-16 times/minutes 1

    7. a)insulin synthesis 1

    8. a)Both Assertion and Reason are correct. 1

    SECTION -II

    9. Probiotic bacteria; Beneficial bacteria. Eg: Bacterial present in curd. Cyanobacteria –produce O2

    Pathogenic bacteria

    Disease Causing bacteria Eg: Bacterial causing cholera. (Vibrio cholera)

    1

    1

    10. Pulsatile flow of blood through the arteries

    Passive recoil of the lungs following inspiration

    1

    1

    11. Two sex organs nature at different times Sperm develops earlier than the production of Ova

    1

    1

    12. It helps to maintain food chain and our eco system It feed on insects and helps in reducing insect pest population

    1

    1

    13. Because of complete partition of all the chambers. (Auricles and ventricles) in the heart

    2

    14. Vital capacity (VC) = Expiratory Reserve Volume(ERV)+Tidal Volume (TV) + Inspiratory Reserve Volume (IRV)

    =(ERV) + (TV) + (IRV) = 1100 + 7000 + 3000

    1

    1 VC = 11100

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  • [Type text] Page 2

    SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL. 99655-31727, 8072992139,

    SECTION -III 15. DNA Barcoding - To identify particular organisms DNA

    DNA hybridization - To measure the degree of genetic similarity DNA Fingerprinting - To identify individuals by unique patterns in their DNA Restriction fragment length polymorphisms - analysis difference in homologous DNA sequences that can be detected by the presence of fragments of different lengths after digestion of the DNA sample polymerase chain reaction - (PCR) - to amplify a specific gene

    ½

    ½

    ½

    ½ M

    16. The body cavity is formed from the mesodermal pouches of archenteron. Eg:Echinoderms, hemichordates and chordates

    2

    1 17. NERVE CELL: diagram

    .

    Lable any two parts

    2

    1

    18. Two actions of trypsin: Trypsin activates the enzyme chymotrypsinogen into chymotrypsin

    Trypsin hydrolyses proteins into polypeptides and peptones

    1 ½

    1 ½

    19. blood group does not have antigens.

    AB blood group does not have antibodies.

    So there is no antibodies produced by the AB blood group person against O blood group . hence agglutination will not takes place

    1 ½

    1 ½

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  • [Type text] Page 3

    SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL. 99655-31727, 8072992139,

    20. RULES OF NOMENCLATURE : (any 5 points) The scientific name should be italicized in printed form and if

    handwritten, it should be underlined separately.

    The generic name’s (genus) first alphabet should be in uppercase

    The specific name (Species ) should be in lowercase

    The scientific names of any two organisms are not similar.

    The name or abbreviated name of the scientist who first publishes the scientific name may be written after the species name along with the year of publication. For example Lion-Felis leo Linn., 1758 or Felis leo L., 1758.

    If the species name is framed after any perons’s name the name of the species shall end with i, ii or ae. For example, a new species of a ground dwelling lizard (Cyrtodactylus) has been discovered and named after scientist Varad Giri, Cyrtodactylus varadgirii.

    (OR) FUNDAMENTAL DISTINCT FEATURES OF CHORDATES:

    Presence of elongated rod like notochord below the nerve cord and above the alimentary canal. It serves as a primitive internal skeleton.

    In adult vertebrates, it may be partially or completely replaced by backbone or vertebral column.

    A dorsal hollow or tubular fluid filled nerve cord lies above the notochord and below the dorsal body wall.

    In higher chordates, the anterior end of the nerve cord gets enlarged to form the brain and the posterior part becomes the spinal cord, protected inside the vertebral column.

    Presence of pharyngeal gill slits or clefts in all chordates at some stage of their lifecycle.

    In aquatic forms, pharyngeal gill slits are vascular, lamellar and form the gills for respiration.

    In terrestrial chordates, traces of non-functional gill clefts appear during embryonic developmental stages and disappear later.

    They possess post anal tail, closed circulatory system with a ventral myogenic heart except in Amphioxus.

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    21. The neuronal control is achieved through autonomic nervous system (sympathetic and parasympathetic). Sympathetic neurons release nor-epinephrine and adrenal medulla releases epinephrine.

    The two hormones bind to β – adrenergic receptors and increase the heart rate.

    The parasympathetic neurons secrete acetylcholine that binds to muscarinic receptors and decreases the heart beat.

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  • [Type text] Page 4

    SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL. 99655-31727, 8072992139,

    Vasopressin and angiotensin II, involved in the regulation of the kidneys, results in vasoconstriction while natriuretic peptide promotes vasodilation.

    Vagus nerve is a parasympathetic nerve that supplies the atrium especially the SA and the AV nodes.

    (OR) Dissolved in plasma

    About 7 – 10% of CO2 is transported in a dissolved form in the plasma. Bound to haemoglobin About 20 – 25% of dissolved CO2 is bound and carried in the RBCs as carbaminohaemoglobin .(Hb CO2).

    CO2 + Hb Hb CO2)

    As bicarbonate ions in plasma about 70% of CO2 is transported as bicarbonate ions.

    RBCs contain a high concentration of the enzyme, carbonic anhydrase, Whereas small amounts of carbonic anhydrase is present in the plasma.

    When CO2 diffuses into the RBCs, it combines with water forming

    carbonic acid (H2CO3) catalyzed by carbonic anhydrase. Carbonic anhydrase facilitates the reaction in both directions.

    At the alveolar site where pCO2 is low, the reaction is reversed leading

    to the formation of CO2 and water.

    Thus CO2 trapped as HCO3– at the tissue level it is transported to the alveoli and released out as CO2

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    E.CHINNADURAI.M.Sc. M.Ed., M.Phil.,

    Department of ZOOLOGY SHRI VIDHYABHARATHI MATRIC HR.SEC.SCHOOL SAKKARAMPALAYAM , AGARAM (PO) ELACHIPALAYAM

    TIRUCHENGODE(TK), NAMAKKAL (DT) PIN-637202

    CELL: , 99655-31727> 8072992139,

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