For 0.1 m aq. solution of given electrolytes correct order of their increasing order of boiling poin — NEET Chemistry Past Papers Chemistry Question

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For 0.1 m aq. solution of given electrolytes correct order of their increasing order of boiling point : (A) CH COOH < HCOOH < NaCl < Na SO (B) HCl < HCOOH < NaCl < Na SO (C) HCOOH < CH COOH < NaCl < Na SO (D) Na SO < NaCl < HCOOH < CH COOH 100. 10 ml of 10 M H SO is mixed to 100 ml 1M NaOH solution. The resultant solution will be (1) Acidic (2) Neutral (3) Weakly alkaline (4) Strongly alkaline 3 6 2+ 6 3– 4 2– 3 6 3+ 2 4 2 3 6 2 6 2 2 2 2 2 2 2 2 3+ – 2+ 3+ – 2 – – 2+ – – 2+ 2+ – – 2+ 2+ – Eo Fe2+/Fe = −0.44V ; Eo Fe3+/Fe2+ = 0.77V 3+ 3+ 3+ 2+ 3+ 2+ 3 2 4 2 4 3 2 4 2 4 3 2 4 MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 SECTION-A Attempt All 35 questions 101. Statement-I : All living organisms possess metabolic reactions. Statement-II : Each name have two components generic name and the specific epithet. (1) Both Statement-I and Statement-II are true. (2) Both Statement-I and Statement-II are false. (3) Statement-I is true, but Statement-II is false. (4) Statement-I is false, but Statement-II is true. 102. Who is known as the "Father of Taxonomy"? (1) Aristotle (2) Linnaeus (3) Darwin (4) Lamarck 103. Identify the incorrect statement(s) :- (I) Growth is a defining feature of living organisms. (II) All living organisms show cellular organization. (III) Reproduction is a defining characteristic of all living organisms. (IV) All living organisms exhibit metabolism. (1) I and II (2) III only (3) II and IV (4) I, II, and III 104. In which type of phyllotaxy each node bear two leaves? (1) Alternate (2) Opposite (3) Whorled (4) Spiral 105. Which part of a flower develops into fruit? (1) Ovule (2) Ovary (3) Petal (4) Anther 106. Identify the incorrect statement(s) :- (1) In compound leaves, the leaf blade is divided into leaflets. (2) The outer covering of endosperm separates the embryo by a proteinous layer called aleurone layer. (3) Ovary is one-chambered but it becomes two chambered due to the formation of the false septum in tomato. (4) The style connects the ovary to the stigma. 107. The type of inflorescence wherein the main axis has limited growth and ends in a flower is termed :- (1) Racemose (2) Cymose (3) Hypanthodium (4) Cyathium 108. In a monocot stem, which of the following structures is absent? (1) Ground tissue (2) Epidermis (3) Vascular bundles (4) Cambium 109. Statement-I : When xylem and phloem within a vascular bundle are arranged in an alternate manner along the different radii, the arrangement is called radial such as in stem. Statement-II : The conjoint vascular bundles usually have the phloem located only on the outer side of xylem. (1) Both Statement-I and Statement-II are correct. (2) Statement-I is correct but Statement-II is incorrect. (3) Both Statement-I and Statement-II are incorrect. (4) Statement-I is incorrect but Statement-II is correct. SUBJECT : BIOLOGY-I MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 110. Identify the correct statement :- (1) Initiation of lateral roots and vascular cambium during the secondary growth takes place in hypodermal cells. (2) The pith is small or inconspicuous in monocot root. (3) As compared to the monocot root, dicot root have fewer xylem bundles. (4) The tangential as well as radial walls of the endodermal cells have a deposition of water-impermeable, waxy material suberin in the form of conjunctive tissue. 111. The four elements called "Big-four" which make up 95% of all elements found in a living system are :- (1) C, H, O, N (2) C, H, O, P (3) C, H, O, S (4) C, N, O, P 112. Macromolecules are :- (1) Nucleic acids, proteins and polysaccharides (2) Nucleic acids and monosaccharides (3) Amino acids and polysaccharides (4) Amino acids, lipids and nucleotides 113. Fructose is a ketose sugar and also called :- (1) An aldose (2) Fruit sugar (3) Cane sugar (4) Corn sugar 114. Invert sugar is mixture of :- (1) Maltose and fructose (2) Glucose and galactose (3) Glucose and fructose (4) All of the above 115. Identify the incorrect statement about Z scheme :- (1) Z shaped is formed when all the carriers are placed in sequence on a redox potential scale. (2) PS I are excited when they receive red light of wavelength 700 nm. (3) PS II absorbs 680 nm of blue light causing electrons to become excited. (4) Addition of electron (downhill) reduces NADP to NADPH + H 116. _______________ is the synthesis of ATP from ADP and inorganic phosphate in the presence of light. (1) Phosphorylation (2) Photo phosphorylation (3) Light reaction (4) Dark reaction 117. Photophosphorylation occurs due to cyclic flows of electrons when only PS I is functional in :- (1) Stroma lamellae (2) Grana lamellae (3) Stroma (4) Lumen 118. Which of the following is a first product of the Calvin cycle? (1) Glucose (2) Sucrose (3) ATP (4) Glyceraldehyde-3-phosphate 119. How many ATP are formed in ETS from reduced NAD generated in one turn cycle of krebs' cycle? (1) 3 (2) 6 (3) 12 (4) 9 + + MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 120. Chemiosmotic hypothesis of ATP synthesis in respiration based on :- (1) Proton gradient between lumen and stroma. (2) Proton gradient between matrix and inner membrane. (3) Proton gradient between matrix and inner membrane space. (4) Proton gradient between matrix and inter membrane space. 121. What is shown in the figure :- (1) A → Heterocyst, B → Mucilaginous sheath (2) A → Akinete, B → Filament (3) A → Akinete, B → Hormogonia (4) A → Akinete, B → Trichome 122. Match the column and find the correct answer :- Column-I Column-II (A) Streptomyces (i) Food poisoning (B) Rhizobium (ii) Source of antibiotics (C) Nitrosomonas (iii) Nitogen fixation (D) Acetobacter (iv) Nitrification (v) Vinegar synthesis (1) A–iv, B–v, C–i, D–iii (2) A–v, B–i, C–iii, D–iv (3) A–ii, B–iii, C–iv, D–v (4) A–iv, B–iii, C–i, D–v 123. The unicellular eukaryotic organisms were placed in :- (1) Protista (2) Monera (3) Fungi (4) Animalia 124. Fungi differ from algae in having :- (1) Mainly cellulosic cell wall (2) Mainly cell wall of chitin (3) Unicellular nonjacketed sex organ (4) Starch as reserve food 125. Match the following :- Column-I Column-II (i) Phaeophyceae (A) Fucoxanthin (ii) Cyanophyceae (B) Phycoerythrin (iii) Rhodophyceae (C) Chl a, b (iv) Diatoms (D) Chrysolaminarin (1) i–A, ii–B, iii–C, iv–D (2) i–A, ii–C, iii–B, iv–D (3) i–C, ii–B, iii–A, iv–D (4) i–B, ii–A, iii–D, iv–C 126. Characteristic of angiosperms which distinguish them from gymnosperms :- (1) Presence of fruits and flowers (2) Double fertilization and triploid endosperm formed after double fertilization (3) Companion cells in phloem and vessels in xylem (4) All of the above 127. Selaginella and Salvinia are considered to represent a significant step toward evolution of seed habit because :- (1) Female gametophyte is free and gets dispersed like seeds. (2) Female gametophyte lacks archegonia. (3) Megaspores possess endosperm and embryo surrounded by seed coat. (4) Embryo develops in female gametophyte which is retained on parent sporophyte. MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 128. Assertion : In Eukaryotic cells there is an extensive compartmentalisation of cytoplasm. Reason : There is a presence of membrane bound organelles in eukaryotic cells. (1) Assertion and Reason are correct and Reason is the correct explanation of Assertion. (2) Assertion and Reason are correct and Reason is not the correct explanation of Assertion. (3) Assertion is correct and Reason is incorrect. (4) Assertion is incorrect and Reason is correct. 129. Which statement is not correct about integral and peripheral proteins :- (1) They are considered as a membrane protein. (2) They are classified based on ease of extraction. (3) Peripharal proteins lie on the surface of membrane while integral proteins are partially buried in the membrane. (4) Peripharal proteins lie on the surface while integral proteins are partially or totally buried in the membrane. 130. What is the cause of cell division? (1) Increase in surface area/volume ratio due to growth of cell. (2) Nucleo-cytoplasmic ratio decreases due to increase in size of cell. (3) Disturbance in lipid and protein ratio. (4) All of the above 131. In disjunction (separation) of sister chromatids at anaphase :- (1) Centromere moves first and arms trail behind. (2) Arms move first and centromere trails behind. (3) Any of the above cases. (4) Centromere does not move in anaphase. 132. The sequence of substages of prophase-I are :- (1) Leptotene — Zygotene — Pachytene — Diplotene — Diakinesis (2) Leptotene — Zygotene — Pachytene — Diakinesis — Diplotene (3) Leptotene — Zygotene — Pachytene — Diakinesis (4) Leptotene — Pachytene — Diplotene — Zygotene — Diakinesis 133. The phenomenon of apical dominance can be overcome by exogenous application of :- (1) ABA (2) Gibberellins (3) Cytokinins (4) Ethylene 134. The first natural cytokinin of plants is :- (1) Zeatin (2) Kinetin (3) Dihydrooxyzeatin (4) Riboxylzeatin 135. Bakanae disease in japan was due to a fungus known as :- (1) Gibberella fujikori (2) Aspergillus flavus (3) Both (1) and (2) (4) Plasmopara viticola MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 SECTION-B This section will have 15 questions. Candidate can choose to attempt any 10 questions out of these 15 questions. In case if candidate attempts more than 10 questions, first 10 attempted questions will be considered for marking. 136. Assertion : Nomenclature provides each organism a scientific name. Reason : Scientific names are universally accepted. (1) Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. (2) Both Assertion and Reason are true, but Reason is not the correct explanation of Assertion. (3) Assertion is true, but Reason is false. (4) Assertion is false, but Reason is true. 137. Out of four aestivations of petals given below, which one is found in Malvaceae :- (1) 1 (2) 2 (3) 3 (4) 4 138. Statement-I : Sclerenchyma cells are dead at maturity. Statement-II : Sclerenchyma cells have lignified cell walls that provide rigidity. (1) Both Statement-I and Statement-II are correct. (2) Statement-I is correct but Statement-II is incorrect. (3) Both Statement-I and Statement-II are incorrect. (4) Only Statement-II is correct. 139. Amino acids usually exist in the form of Zwitter ions. This means that they consist of :- (1) The basic NH group and acidic COOH group. (2) The basic NH group and acidic COO group. (3) Basic COO group and acidic NH group. (4) None of the above 140. Cellulose in plant cell wall is made up of :- (1) Unbranched chain of glucose molecules linked by α, 1→6 glycosidic bond. (2) Unbranched chain of glucose molecules linked by β, 1→4 glycosidic bond. (3) Branched chain of glucose molecules linked by α, →6 glycosidic bond in straight chain & β →1,4 at the site of branching. (4) Branched chains have α →1,4 bond and β →1,6 glycosidic bonds both. 141. Which statement is incorrect with respect of splitting of water :- (1) Splitting of water is associated with PS II (2) Water is splits into 2H , [O] and electrons (3) Oxygen is one of the net products of splitting of water (4) Splitting of water process occurs on the outer side of the membrane of thylakoid 142. Pyruvic acid + CoA + NAD Acetyl CoA + CO + NADH + H A is → (1) Coenzyme A (2) Mg (3) K (4) ATP 2 3+ – – 3– + + 2 + +2 + MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 143. Match the following and select the correct combination from the options given below :- Column-I (Kingdom Column-II (Class) (A) Plantae (1) Archaebacteria (B) Fungi (2) Euglenoids (C) Protista (3) Phycomycetes (D) Monera (4) Algae (1) A–4, B–3, C–2, D–1 (2) A–1, B–2, C–3, D–4 (3) A–3, B–4, C–2, D–1 (4) A–2, B–3, C–4, D–1 144. Mycorrhizae are symbiotic association of fungi with roots of higher plants. these are useful for plants due to their following attribute. (1) Fixing atmospheric nitrogen. (2) Enhancing absorption of nutrients from soil. (3) Killing atmospheric nitrogen in nearby area. (4) Providing susceptibility against abiotic stress. 145. Select the mismatch :- (1) Pinus – Coralloid roots (2) Cycas – Unbranched stem (3) Salvinia – Heterosporous (4) Equisetum – Homosporous 146. Which one is wrongly matched? (1) Unicellular organism — Chlorella (2) Gemma cups — Marchantia (3) Biflagellate zoospores — Brown algae (4) Uniflagellate gametes — Polysiphonia 147. Assertion : The cell wall provides a strong structural support to prevent the bacterium from bursting or collapsing. Reason : Cell envelope including cell wall act together as a single protective unit. (1) Assertion and Reason are correct and Reason is the correct explanation of Assertion. (2) Assertion and Reason are correct and Reason is not the correct explanation of Assertion. (3) Assertion is correct and Reason is incorrect. (4) Assertion is incorrect and Reason is correct. 148. Which is not a function of endoplasmic reticulum : (1) Endoplasmic reticulum form endoskeleton of cell (2) Endoplasmic reticulum is the major site for synthesis of lipid. (3) Endoplasmic reticulum is concerned with detoxification of drugs, pollutants and steroids. (4) Endoplasmic reticulum perform the function of packaging material. 149. Bivalents are formed in :- (1) Diplotene (2) Pachytene (3) Zygotene (4) Interkinesis 150. Go through the following figure :- Choose the correct labelling. (i) (ii) (iii) (1) Log phase Exponential phase Stationary phase (2) Lag phase Exponential phase Stationary phase (3) Exponential phase Log phase Stationary phase (4) Stationary phase Exponential phase Log phase MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 SECTION-A Attempt All 35 questions 151. Body covered by calcareous shell and unsegmented with distinct head, muscular foot and visceral hump is seen in :- (1) Mollusca (2) Echinodermata (3) Hemichordata (4) Chordata 152. Incomplete digestive system that has a single opening to outside of body that serves as both mouth and anus is present in member of which phylum ? (1) Porifera (2) Coelentrata (3) Platyhelminthes (4) Aschelminthes 153. Compound epithelium is found in all except : (1) Dry surfaces of skin (2) Moist surface of vagina (3) Inner lining of arteries (4) Moist surface of buccal cavity. 154. Simple squamous epithelium (1) Is absent in thin part of loop of Henle (2) Is found in the walls of blood vessels and air sacs of lungs (3) Has no role in filtration (4) All are incorrect 155. Cuboidal epithelium with brush border of microvilli is found in :- (1) Eustachian tube (2) Lining of intestine (3) Ducts of salivary gland (4) Proximal convoluted tubule of nephron 156. All of the following factors are favourable for dissociation of oxyhaemoglobin at tissues level, except : (1) High pCO (2) Lower temperature (3) Low pO (4) Higher H concentration 157. Mark the correct pair of muscles involved in the normal breathing in humans - (1) External and internal intercostal muscles (2) Diaphragm and abdominal muscles (3) Diaphragm and external intercostal muscles (4) Diaphragm, external and internal intercostal muscles 158. Respiratory process is regulated by certain specialized centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation – (1) Medullary inspiratory centre (2) Pneumotaxic centre (3) Chemosynthetic centre (4) Apneustic centre 159. How many Antigen is present on the surface of RBC in blood group AB positive ? (1) One (2) Two (3) Three (4) Four 160. Fibrins are formed by conversion of ______ in ______ by the enzyme _______. (1) Fibrinogen, Serum, Thrombokinase (2) Prothrombin, Plasma, Thrombin (3) Fibrinogen, Plasma, Thrombin (4) Prothrombin, blood, Thrombokinase SUBJECT : BIOLOGY-II 2 2 + MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 161. Rh antibodies from Rh -ve mother can be fatal to :- (1) 1 Rh child (2) Subsequent foetus which is Rh ve (3) Subsequent foetus which is Rh ve (4) Not fatal to any foetus 162. Which one of the following statement is correct ? (1) Adult human excretes, on an average 3 to 3-5 litres of urine per day (2) In micturition relaxation of urethral sphincter cause release of urine (3) Analysis of urine have least important role in clinical diagnosis of metabolic disorders (4) Urine is slightly basic in nature 163. Match the column I with column II Column-I Column-II A Nephridia I Prawn B Malpighian tubules II Earthworm C Green glands III Cockroach (1) A - I, B - II, C - III (2) A - III, B - II, C - I (3) A - II, B - III, C - I (4) A - II, B - I, C - III 164. Which of the following is incorrect statement about cardiac muscles? (1) Found in heart and intestine (2) Based on appearance, cardiac muscles are non-striated (3) They are voluntary in nature as the nervous system does not control their activities directly (4) All are incorrect 165. Which of the following is correct statement ? (1) Sternum is a flat bone on the dorsal side (2) The spinal cord protects the vertebrae column (3) Cervical vertebrae are seven in all mammals with no exception (4) Vertebrae column serves as the point of attachment for the musculature of the back 166. The cerebrum wraps around a structure called ___. Which is major coordinating centre for sensory and motor signaling. (1) Hypothalamus (2) Corpus callosum (3) Thalamus (4) Epithalamus 167. Find out the incorrect statement from the options given below :- (1) Neurotransmitter bind to their specific receptors, present on the post synaptic membrane. (2) A canal called the cerebral aqueduct possesses through the midbrain. (3) Association areas of brain are responsible for complex functions like intersensory association, memory and communication. (4) Electrical synapses pass electrical signal between cells with the use of Ach. 168. Select the correct statement w.r.t brain stem (1) It connects two cerebellar hemispheres (2) It includes midbrain and parts of hindbrain (3) Neural structure responsible for maintaining temperature of body (4) It includes midbrain and complete hindbrain st ⊕ ⊖ ⊕ MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 169. Which of the following statement is false ? (1) The endocrine system provides chemical integration through hormones. (2) The neural system provides an organised network of point-to-point connections for quick coordination. (3) In our body neural system and endocrine system jointly coordinate and integrate all the activities of the organs so that they function in a synchronised fashion. (4) In Hydra a brain is present along with a number of ganglia and neural tissue. 170. The posterior pituitary gland is not a 'true' endocrine gland because (1) It is provided with a duct (2) It only stores and releases hormones (3) It is under the regulation of hypothalamus (4) It secretes enzymes 171. Which of the following hormones can play a significant role in osteoporosis? (1) ADH (2) Aldosterone (3) Parathyroid hormone (4) Prolactin 172. Statement I: Oxytocin is called milk ejecting hormone. Statement II: Epinephrine is a catecholamine. (1) Both statements I and II are incorrect (2) Statement I is correct but statement II is incorrect (3) Statement I is incorrect but statement II is correct (4) Both statements I and II are correct 173. Erythropoietin hormone which stimulates erythropoiesis is secreted by :- (1) β cells of pancreas (2) cells of Neurohypophysis (3) Red bone marrow (4) Juxta glomerular cells of kidneys 174. In amphibians, respiration occurs through - (1) Gills (2) Lungs (3) Skin (4) All of these 175. The following statement are associated with the occurrence of notochord. Identify the incorrect statement. (1) It is present only in larval tail in ascidians. (2) It is replaced by a vertebral column in adult frog. (3) It is absent throughout the life in humans from the very beginning. (4) It is present throughout life in Amphioxus. 176. Refer the figures A, B and C and choose the correct option which shows animals that regulate buoyancy with the help of air bladder. (1) A and B (2) A and C (3) B and C (4) All of the above MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 177. The following figure shows the external features of cockroach with few structures labelled as A, B, C, D, and E. Identify A to E . (1) A- Mesothorax, B-Pronotum, C-Metathorax, D-Tegmina, E-Anal style (2) `A- Pronotum, B-Metathorax, C-Mesothorax- Tegmina, E-Sterna (3) A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal cerci (4) A- Pronotum, B-Mesothorax, C-Metathorax, D-Tegmina, E-Anal style 178. Most oxygen is carried by the blood __(i)__. Most carbon dioxide is carried by the blood __(ii)__. (1) (i) attached to haemoglobin, (ii) in the form of bicarbonate ions. (2) (i) dissolved in plasma, (ii) dissolved in plasma. (3) (i) in the form of H ions, (ii) in the form of bicarbonate ions. (4) (i) attached to haemoglobin, (ii) attached to haemoglobin. 179. Contraction of the ventricle in the heart begins by the command from - (1) Purkinje fibres (2) AV node (3) Chordae tendinae (4) SA node 180. During muscle contraction. (1) Chemical energy is changed to electrical energy. (2) Mechanical energy is changed to chemical energy. (3) Chemical energy is changed to physical energy. (4) Chemical energy is changed to mechanical energy. 181. ‘X’ is an important part of ‘Y’ which lies at the base of the structure which is a major coordinating centre for sensory and motor signalling. It contains a number of centre which control body temperature, urge for eating and drinking. Identify X and Y from the options given below - (1) X -Cerebellum; Y – Hindbrain (2) X -Hypothalamus; Y - Forebrain (3) X -Corpora quadrigemina; Y – Midbrain (4) X -Pituitary gland; Y – Forebrain 182. In hormone action, if receptor molecules are removed from target organ, the target organ will - (1) Continue to respond to hormone. (2) Not respond to hormone. (3) Continue to respond but requires higher concentration. (4) Continue to respond but in the opposite way. 183. Hormones involved in carbohydrate metabolism are - (1) Insulin, glucagon, epinephrine and calcitonin (2) Insulin, glucagon, epinephrine and glucocorticoids (3) Insulin, glucagon, cortisol and melatonin (4) Insulin, glucagon, norepinephrine and melatonin + MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 184. If Henle’s loop were absent from mammalian nephron which of the following event is to be expected? (1) There will be no urine formation. (2) There will be hardly any change in the quality and quantity of urine formed. (3) The urine will be more concentrated. (4) The urine will be more dilute. 185. Which of the following statement is incorrect? (1) Counter-current flow of blood in vasa recta helps to retain the reabsorbed sodium in the renal medulla. (2) Glomerular filtrate is protein free plasma. (3) Vasa recta carry glomerular filtrate from distal convoluted tubule to the collecting duct. (4) Glomerular filtrate in Bowman’s capsule is isotonic to the plasma. SECTION-B This section will have 15 questions. Candidate can choose to attempt any 10 questions out of these 15 questions. In case if candidate attempts more than 10 questions, first 10 attempted questions will be considered for marking. 186. Read the following terminology of column-I & II and identify their correct match :- Column-I Column-II (A) Dorsal hollow nerve cord (i) Echinodermata (B) Stomochord (ii) Porifera (C) Radial symmetry (iii) Platyhelminthes (D) Feather like gills (iv) Annelida (v) Chordata (vi) Mollusca (vii) Hemichordata (1) (A)-(v), (B)-(vii), (C)-(ii), (D)-(iv) (2) (A)-(v), (B)-(vii), (C)-(vi), (D)-(ii) (3) (A)-(v), (B)-(vii), (C)-(i), (D)-(vi) (4) (A)-(vii), (B)-(v), (C)-(iii), (D)-(i) 187. Statement-1 :- The skin of Aves is unique in possessing hairs. Statement-2 :- Most unique mammalian character is presence of mammary glands. (1) Statement 1 is incorrect but Statement 2 is correct. (2) Both Statement 1 and Statement 2 are incorrect. (3) Both Statement 1 and Statement 2 are correct. (4) Statement 1 is correct but Statement 2 is incorrect. 188. Given below are some statements : I. Members of this class are ectoparasite on some fishes. II. Bearing 6-15 pairs of gill slits. III. Circular mouth without jaw. IV. Member of this class are marine but migrate for spawning to fresh water. How many statements belong to class cyclostomata ? (1) Only two (2) Only three (3) Only one (4) All four 189. Which of the following statements is correct for the organism shown in the given figure. (1) It does not shows sexual dimorphism (2) Body divisible into Head, Trunk and Tail (3) Tadpole undergoes metamorphosis to form the adult. (4) Female lays 20000–22000 ova at a time MAJOR TEST SERIES - ENTHUSE + LEADER COURSE_PHASE - 1 9610ZMD801500240001 190. Match the following columns Place pO pCO A Alveoli P 95 I 40 B Oxy. Blood Q 40 II 45 C Tissue R 104 III 40 (1) A - R - I, B - P - III, C - Q - II (2) A - P - II, B - Q - I, C - R - III (3) A - Q - I, B - P - II, C - R - III (4) A - R - III, B - Q - II, C - P - I 191. Find out the correct statement about human circulatory system ? (1) Opening between right atrium and right ventricle is guarded by tricuspid valve (2) Heart is ectodermally derived organ (3) Not all vertebrates posses muscular chambered heart (4) All molluscs have closed network of blood vessels 192. In which one of the following options Column I is correctly matched with Column II? Column I Column II (1) Reabsorption of glucose, amino acids, Na Passive (2) Reabsorption of urea Active (3) Tubular secretion of H Active (4) Conditional reabsorption of Na and water PCT 193. Which of the given regulatory mechanisms can be observed once there is an increase in volume of body fluid ? a. Osmoreceptors on hypothalamus switch off b. Vasopressin from neurohypophysis is released c. Aldosterone causes reabsorption of Na and water d. Constriction of blood vessels occur (1) a, c only (2) b, c, d only (3) a, d only (4) Only a