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DATE : 12/09/2021 Test Booklet Code, , M1, , GAJAHA, , , , , , , , , , Time : 3 hrs. Answers & Solutions Max. Marks : 720, , for, NEET (UG) - 2021, , Important Instructions :, , 1. The test is of 3 hours duration and Test Booklet contains 200 multiple choice questions (Four options, with a single correct answer). There are two sections in each subject, i.e. Section-A & Section-B. You, have to attempt all 35 questions from Section-A & only 10 questions from Section-B out of 15., (Candidates are advised to read all 15 questions in each subject of Section-B before they start, attempting the question paper. In the event of a candidate attempting more than ten questions, the first, ten questions answered by the candidate shall be evaluated.), , 2. Each question carries 4 marks. For each correct response, the candidate will get 4 marks. For every, wrong response 1 mark shall be deducted from the total score. Unanswered / unattempted questions, will be given no marks. The maximum marks are 720., , Use Blue / Black Ball point Pen only for writing particulars on this page/marking responses., , Rough work is to be done in the space provided for this purpose in the Test Booklet only., , On completion of the test, the candidate must handover the Answer Sheet to the Invigilator before leaving, the Room / Hall. The candidates are allowed to take away this Test Booklet with them., , The CODE for this Booklet is M1., , The candidates should ensure that the Answer Sheet is not folded. Do not make any stray marks on the, Answer Sheet. Do not write your Roll No. anywhere else except in the specified space in the Test, Booklet/Answer Sheet. Use of whiste fluid for correction is NOT permissible on the Answer Sheet., , 8. Each candidate must show on demand his/her Admission Card to the Invigilator., , 9. No candidate, without special permission of the Superintendent or Invigilator, would leave his/her seat., , 10. Use of Electronic/Manual Calculator is prohibited., , 11. The candidates are governed by all Rules and Regulations of the examination with regard to their conduct, in the Examination Hall. All cases of unfair means will be dealt with as per Rules and Regulations of this, examination., , 12. No part of the Test Booklet and Answer Sheet shall be detached under any circumstances., , 13. The candidates will write the Correct Test Booklet Code as given in the Test Booklet / Answer Sheet in, the Attendance Sheet.

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101., , NEET (UG)-2021 (Code-M1), , SECTION -A, Which of the following plants is monoecious?, (1) Carica papaya, (2) Chara, (3) Marchantia polymorpha, , (4) Cycas circinalis, , Answer (2), , Sol., , 102., , « When male and female sex organs are present, on same plant body, such plants are said to be, monoecious., , e Most of the species of Chara are monoecious., , e Cycas circinalis, Carica papaya and Marchantia, polymorpha are dioecious., , A typical angiosperm embryo sac at maturity is:, (1) 8-nucleate and 7-celled, (2) 7-nucleate and 8-celled, (3) 7-nucleate and 7-celled, , (4) 8-nucleate and 8-celled, , Answer (1), , Sol., , 103., , A typical angiospermic embryo sac has seven cells, that are three antipodals, one central cell, one egg, cell and two synergids., , The central cell has two polar nuclei, hence the, embryo sac is eight nucleated., , Gemmae are present in, (1) Mosses, , (2) Pteridophytes, , (3) Some Gymnosperms, , (4) Some Liverworts, , Answer (4), , Sol., , e Gemmae are green, multicellular asexual buds, that are produced by some liverworts like, Marchantia., , e Mosses reproduce vegetatively by fragmentation, and budding of protonema., , e Pteridophytes and Gymnosperms normally do, not reproduce asexually, , , , 104., , When the centromere is situated in the middle of two, equal arms of chromosomes, the chromosome is, referred as :, , (1) Metacentric, , (3) Sub-metacentric, , (2) Telocentric, , (4) Acrocentric, , Answer (1), , Sol., , 105., , When the centromere is situated in the middle of two, equal arms of chromosomes, the chromosome is, referred as Metacentric., , When the centromere is present slightly away from, the middle, it is called sub-metacentric, chromosome., , When the centromere is present very close to one, end of the chromosome, it is called acrocentric, chromosome., , When the centromere is present at terminal position,, the chromosome is called telocentric., , Which of the following stages of meiosis involves, division of centromere?, , (1) Metaphase |, (3) Anaphase II, , (2) Metaphase II, (4) Telophase II, , Answer (3), , Sol., , 106., , e Division of centromere occurs in anaphase II., , e Telophase II is the last stage of meiosis II., During this phase, the chromatids reach the, poles and start uncoiling., , * Chromosomes form two parallel plates in, metaphase | and one plate in metaphase II., , The first stable product of CO, fixation in Sorghum is, (1) Pyruvic acid, , (2) Oxaloacetic acid, , (3) Succinic acid, , (4) Phosphoglyceric acid, , Answer (2), , Sol., , ¢ Sorghum is a C, plant. The first stable product, of CO, fixation in Sorghum is oxaloacetic acid., , e The first stable product in C, cycle is, 3-phosphoglyceric acid., , e Pyruvic acid is the end product of glycolysis., , e Succinic acid is an intermediate product in krebs, cycle.

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107. The factor that leads to Founder effect in a, population is :, , (1), (2), (8), (4), , Natural selection, Genetic recombination, Mutation, , Genetic drift, , Answer (4), , Sol. «, , Change in gene frequency in a small population, by chance is known as genetic drift. Genetic, drift has two ramifications, one is bottle neck, effect and another is founder's effect., , When accidentally a few individuals are, dispersed and act as founders of a new isolated, population, founder's effect is said to be, observed., , Crossing over which occurs during gamete, formation results in genetic recombination., , Mutations are random and directionless., , 108. Which of the following is an incorrect statement?, , (1), , 2, , Q, , (4, , Mature sieve tube elements possess a, conspicuous nucleus and usual cytoplasmic, organelles, , Microbodies are present both in plant and animal, cells, , The perinuclear space forms a barrier between, the materials present inside the nucleus and that, of the cytoplasm, , Nuclear pores act as passages for proteins and, RNA molecules in both directions between, nucleus and cytoplasm, , Answer (1), , Sol. A mature sieve tube elements possess a peripheral, cytoplasm and a large central vacuole but lacks a, nucleus., , Rest of other statements are correct., , 109,, (1), (2), (3), (4), , Amensalism can be represented as:, , Species A (—-); Species B (0), Species A (+); Species B (+), Species A (—-); Species B (-), Species A (+); Species B (0), , Answer (1), , Sol. +, , Amensalism is an interaction between two, organisms of different species in which one, species inhibits the growth of other species by, secreting certain chemicals. The first species is, neither get benefited nor harmed., , (+) : (0) interaction is observed in commensalism, (+) : (+) interaction is observed in mutualism., (-) : (-) interaction is seen in competition, , , , NEET (UG)-2021 (Code-M1), , 110. The amount of nutrients, such as carbon, nitrogen,, phosphorus and calcium present in the soil at any, given time, is referred as :, , (1) Climax (2) Climax community, (3) Standing state (4) Standing crop, , Answer (3), , Sol. « Amount of all the inorganic substances or, , nutrients, such as carbon, nitrogen, phosphorus, and calcium present in soil at any given time, is, referred as standing state., , Amount of living material present in different, trophic levels at a given time, is referred as, standing crop., , Climax community is the last community in, biotic succession which is relatively stable and, is in near equilibrium with the environment of, that area., , 111. Which of the following algae contains mannitol as, reserve food material?, , (1) Ectocarpus, (3) Volvox, , (2) Gracilaria, (4) Ulothrix, , Answer (1), , Sol. Ectocarpus is a brown alga belongs to the class, Phaeophyceae. Members of this class have mannitol, and laminarin as stored food material., , Ulothrix and Volvox belong to Chlorophyceae (green, algae). Members of this class have starch as reserve, food material. Gracilaria is a member of red algae, (Rhodophyceae). This class is characterised by, having floridean starch as stored food material., , 112., , Inspite of interspecific competition in nature, which, , mechanism the competing species might have, evolved for their survival?, , (1) Resource partitioning (2) Competitive release, , (3) Mutualism, , (4) Predation, , Answer (1), , Sol. +, , Inspite of interspecific competition the competing, species may co-exist by doing resource, partitioning., In mutualism two organisms are equally, benefitted., , In predation one organism (Predator) eats the, another one (Prey)., , In competition release there occurs dramatical, increase in population of a less distributed, species when its superior competitor is, removed.

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113. Genera like Selaginella and Salvinia produce two, kinds of spores. Such plants are known as:, , (1) Homosorus, , (2) Heterosorus, , (3) Homosporous, , (4) Heterosporous, Answer (4), , Sol. Plants like Se/aginella and Salvinia produce two, kinds of spore i.e., microspores and macrospores., They are known as heterosporous., , Most of the pteridophytes produce single type of, spores and are called homosporous, , Sorus are brownish or yellowish cluster of sporeproducing structures located on the lower surface of, fern leaves., , 114. The site of perception of light in plants during, photoperiodism is, , (1) Shoot apex, , (2) Stem, , (3) Axillary bud, , (4) Leaf, Answer (4), , Sol. e The site of perception of light in plants during, , photoperiodism is leaf., , e The site of perception of low temperature, stimulus during vernalisation is shoot apex and, embryo., , e Axillary bud are not sites of perception of, photoperiod., , 115. Plants follow different pathways in response to, environment or phases of life to form different kinds, of structures. This ability is called, , (1) Elasticity, (2) Flexibility, (3) Plasticity, (4) Maturity, Answer (3), , Sol. Plants show plasticity which means the ability of, plant to follow different pathways and produce, different structures in response to environment., , , , NEET (UG)-2021 (Code-M1), , 116. Match List-I with List-Il., , , , List-1 List-ll, , (a)| Cristae (i), , , , Primary constriction in, chromosome, , , , (b) | Thylakoids (ii) | Disc-shaped sacs in, , Golgi apparatus, , , , (c) | Centromere (iii)| Infoldings in, mitochondria, , , , (d) | Cisternae (iv)| Flattened membranous, sacs in stroma of, plastids, , , , , , , , , , , , , , Choose the correct answer from the options given, below., , (a) (b) (c) (d), , (1) (wy) (iii) (ii) (i), , (2) (i) (wv) (iii) (ii), , (3) (iii) (v) () (ii), , (4) (ii) (iii) (v) (i), Answer (3), , Sol. * The inner membrane of mitochondria forms, , infoldings called cristae., , e Thylakoids are flattened membranous sacs in, stroma of plastids., , * Cisternae are disc shaped sacs in Golgi, apparatus., , e Primary constriction in chromosome that holds, two chromatids together is called centromere., , Hence correct option is (3)- a(iii), b(iv), c(i), d(ii), 117. Match List-I with List-ll., , , , , , , , List-l List-Il, (a) | Cohesion (i) | More attraction in, liquid phase, (b)| Adhesion (ii) | Mutual attraction among, , water molecules, , , , (c) | Surface tension | (ii), (d)| Guttation (iv), , Water loss in liquid phase, , , , Attraction towards polar, surfaces, , , , , , , , , , , , , , Choose the correct answer from the options given, below., , (a) &) (©) @), , (1) Gi) wv) Gill), , 2) (vy) (ii) i) @), , (3) (ii) @ @) Gi), , (4) qi) (iii), Answer (1)

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Sol. (a) Cohesion is mutual attraction among water, , molecules., , (b) Adhesion is attraction towards polar surfaces., , (c) Surface tension explains water molecules are, , more attracted in liquid phase than gaseous, phase., , (d) Guttation is loss of water is liquid form from the, , leaf margins., , 118. DNA strands on a gel stained with ethidium bromide, when viewed under UV radiation, appear as, , (1) Yellow bands, (3) Dark red bands, , (2) Bright orange bands, (4) Bright blue bands, , Answer (2), , Sol. After the bands are stained, they are viewed in UV, light. The bands appear bright orange in colour., Ethidium bromide is the intercalating agent that, stacks in between the nitrogenous bases., , 119., , The term used for transfer of pollen grains from, , anthers of one plant to stigma of a different plant, which, during pollination, brings genetically different, types of pollen grains to stigma, is :, , (1) Xenogamy, (3) Chasmogamy, , (2) Geitonogamy, (4) Cleistogamy, , Answer (1), , Sol. °, , Xenogamy refers to the transfer to pollen grains, from anthers of one plant to stigma of a different, plant which during pollination, brings genetically, different types of pollen grains to stigma., , Cleistogamy is a condition is which flower does, not open., , Geitonogamy refers to the transfer of pollen grain, from anther to stigma of another flower of the, same plant., , Chasmogamy is a condition in which flowers, remain open., , 120. Which of the following algae produce Carrageen?, , (1) Green algae, (3) Red algae, , (2) Brown algae, (4) Blue-green algae, , Answer (3), , Sol. +, , The cell wall of red algae is composed of agar,, carrageen and funori along with cellulose., , In brown algae cell wall contains algin while in, green algae it is composed of cellulose and, pectin., , In blue green algae cell wall is composed of, mucopeptides., , , , NEET (UG)-2021 (Code-M1), , 121. Which of the following statements is not correct?, , (1), 2), (3), (4), , Pyramid of biomass in sea is generally inverted., Pyramid of biomass in sea is generally upright., Pyramid of energy is always upright., , Pyramid of numbers in a grassland ecosystem, is upright., , Answer (2), , Sol. Pyramid of biomass in sea is inverted. For example,, biomass of zooplanktons is higher than that of, phytoplanktons as life span of former is longer and, the latter multiply much faster though having shorter, life span., , , , PC 21, , , , , , , , , , , , PP 04, , , , Small standing crop of phytoplanktons supports, large standing crop of zooplankton, , 122. In the equation GPP — R = NPP, R represents :, (1) Radiant energy (2) Retardation factor, (3) Environmental factor (4) Respiration losses, Answer (4), , Sol. In the equation,, GPP - R = NPP, R refers to respiratory loss, , GPP is gross primary productivity, , NPP is net primary productivity, , 123., (1), 2), (3), (4), , Diadelphous stamens are found in, , China rose, Citrus, Pea, , China rose and citrus, , Answer (3), , Sol. «, , Stamens are said to be diadelphous when these, are united in two bundles e.g. Pea., , China rose has monoadelphous stamens while,, Citrus has polyadelphous = stamens., Monoadelphous stamens are grouped in single, bundle whereas polyadelphous stamens occur in, more than two bundles.