#neet

3 questions

Match List I with List II :List I:A. Down's syndromeB. α-ThalassemiaC. β-ThalassemiaD. Klinefelter's syndromeList II:I. 11^th chromosomeII. 'X' chromosomeIII. 21^st chromosomeIV. 16^th chromosomeChoose the correct answer from the options given below… Answer: 4. A-III, B-IV, C-I, D-II Down's syndrome - trisomy of chromosome 21 (A-III). α-Thalassemia - chromosome 16 (B-IV). β-Thalassemia -... Sex-linked inheritance, Mendelian and chromosomal disorders 1 answer
Which of the following is not a natural/traditional contraceptive method? Answer: 1. Vaults Natural or traditional methods are periodic abstinence, coitus interruptus (withdrawal) and lactational amenorrhea; they a... Birth control, contraception and MTP 1 answer
Which of the following are Autoimmune disorders?A. Myasthenia gravisB. Rheumatoid arthritisC. GoutD. Muscular dystrophyE. Systemic Lupus Erythematosus (SLE)Choose the most appropriate answer from the options given below : Answer: 3. A, B & E only Key idea: in an autoimmune disease the body attacks its own tissue. Myasthenia gravis, rheumatoid arthritis and SLE... Immunology basics and vaccines 1 answer
Which of the following statements is incorrect? Answer: 4. Bio-reactors are used to produce small scale bacterial cultures. Bioreactors are large vessels (hundreds to thousands of litres)... Processes of recombinant DNA technology 1 answer
The DNA present in chloroplast is: Answer: 3. Circular, double stranded Key idea: chloroplast DNA is like bacterial DNA. It is circular and double stranded, and lies in the st... Mitochondria, ribosomes, plastids, microbodies 1 answer
Match List I with List IIList I (Types of Stamens): A. Monoadelphous; B. Diadelphous; C. Polyadelphous; D. EpiphyllousList II (Example): I. Citrus; II. Pea; III. Lily; IV. China-roseChoose the correct answer from the options given below: Answer: 2. A-IV, B-II, C-I, D-III Key idea: classify stamens by how filaments are united. Monoadelphous (one bundle): China-rose (IV). Diade... Flower, fruit and seed 1 answer
Read the following statements and choose the set of correct statements:In the members of Phaeophyceae,A. Asexual reproduction occurs usually by biflagellate zoospores.B. Sexual reproduction is by oogamous method only.C. Stored food is in the form of… Answer: 4. A, C, D and E only Key idea: check each statement about brown algae. A true: asexual reproduction by biflagellate zoospores. B fa... Plant kingdom: algae, bryophytes, pteridophytes, gymnosperms 1 answer
Match List I with List IIList I: A. Citric acid cycle; B. Glycolysis; C. Electron transport system; D. Proton gradientList II: I. Cytoplasm; II. Mitochondrial matrix; III. Intermembrane space of mitochondria; IV. Inner mitochondrial membraneChoose th… Answer: 3. A-II, B-I, C-IV, D-III Key idea: match each process with its location in the cell. Citric acid cycle: mitochondrial matrix (II).... TCA cycle and electron transport system, ATP yield 1 answer
Given below are two statements:Statement I : In C_3 plants, some O_2 binds to RuBisCO, hence CO_2 fixation is decreased.Statement II : In C_4 plants, mesophyll cells show very little photorespiration while bundle sheath cells do not show photorespira… Answer: 4. Statement I is true but Statement II is false Key idea: O₂ competes with CO₂ for RuBisCO in C₃ plants, but C₄ plants avoid photor... C3 and C4 pathways, photorespiration 1 answer
Which of the following statement is correct regarding the process of replication in E.coli? Answer: 1. The DNA dependent DNA polymerase catalyses polymerization in 5' → 3' direction. Key idea: DNA polymerases add nucleotides only in... DNA replication and central dogma 1 answer
Match List I with List IIList I: A. Robert May; B. Alexander von Humboldt; C. Paul Ehrlich; D. David TilmanList II: I. Species-Area relationship; II. Long term ecosystem experiment using out door plots; III. Global species diversity at about 7 millio… Answer: 3. A-III, B-I, C-IV, D-II Key idea: link each scientist with the idea they are known for. Robert May: global species diversity about... Biodiversity: concept, patterns, importance, loss 1 answer
Match List I with List IIList I: A. Frederick Griffith; B. Francois Jacob & Jacque Monod; C. Har Gobind Khorana; D. Meselson & StahlList II: I. Genetic code; II. Semi-conservative mode of DNA replication; III. Transformation; IV. Lac operonChoose the… Answer: 3. A-III, B-IV, C-I, D-II Key idea: match the scientist with the discovery. Griffith: transformation (III). Jacob and Monod: lac ope... DNA as genetic material, DNA and RNA structure, DNA packaging 1 answer
In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is100x (kcal m^-2) yr^-1, what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem? Answer: 4. 10x (kcal m⁻²) yr⁻¹ Key idea: the energy a trophic level can pass on is its net productivity; about 10 percent of it is stored by... Energy flow and ecological pyramids 1 answer
Match List I with List IIList I: A. Rose; B. Pea; C. Cotton; D. MangoList II: I. Twisted aestivation; II. Perigynous flower; III. Drupe; IV. Marginal placentationChoose the correct answer from the options given below: Answer: 2. A-II, B-IV, C-I, D-III Key idea: match the plant with its floral feature. Rose: perigynous flower (II). Pea: marginal placentatio... Flower, fruit and seed 1 answer
Identify the correct description about the given figure: Answer: 2. Wind pollinated plant inflorescence showing flowers with well exposed stamens. Key idea: a dense spike with many long, well-expos... Flower structure, male and female gametophytes 1 answer
Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate. Answer: 4. Succinyl-CoA → Succinic acid Key idea: oxidation steps in the TCA cycle produce NADH or FADH₂ . Isocitrate to α -ketoglutarate (N... TCA cycle and electron transport system, ATP yield 1 answer
Spraying sugarcane crop with which of the following plant growth regulators, increases the length of stem, thus, increasing the yield? Answer: 3. Gibberellin Key idea: gibberellins cause stem elongation. Spraying sugarcane with gibberellin increases internode length, so more... Plant growth regulators: auxin, gibberellin, cytokinin, ethylene, ABA 1 answer
Match List I with List IIList I: A. GLUT-4; B. Insulin; C. Trypsin; D. CollagenList II: I. Hormone; II. Enzyme; III. Intercellular ground substance; IV. Enables glucose transport into cellsChoose the correct answer from the options given below: Answer: 2. A-IV, B-I, C-II, D-III Key idea: match the protein with its role. GLUT-4: enables glucose transport into cells (IV). Insulin: hor... Biomolecules: proteins, carbohydrates, lipids, nucleic acids 1 answer
Which of the following are fused in somatic hybridization involving two varieties of plants? Answer: 4. Protoplasts Key idea: in somatic hybridization, protoplasts of two varieties or species are fused. Cell walls are removed with en... Differentiation, dedifferentiation, redifferentiation, development 1 answer
The flippers of the Penguins and Dolphins are the example of the Answer: 4. Convergent evolution Key idea: unrelated groups that evolve similar structures for similar functions show convergent evolution. P... Evidences of evolution 1 answer
Match List I with List II :List I:A. PleurobrachiaB. RadulaC. StomochordD. Air bladderList II:I. MolluscaII. CtenophoraIII. OsteichthyesIV. HemichordataChoose the correct answer from the options given below : Answer: 3. A-II, B-I, C-IV, D-III Key idea: match each term with its phylum or class. Pleurobrachia (sea walnut) - Ctenophora (A-II). Radula... Non-chordates up to phyla 1 answer
Which of the following is not a component of Fallopian tube? Answer: 2. Uterine fundus Key idea: the fundus belongs to the uterus, not the Fallopian tube. The oviduct has four parts from the ovary side... Male and female reproductive systems 1 answer
Following are the stages of pathway for conduction of an action potential through the heart:A. AV bundleB. Purkinje fibresC. AV nodeD. Bundle branchesE. SA nodeChoose the correct sequence of pathway from the options given below : Answer: 2. E-C-A-D-B Key idea: the impulse follows the heart's conducting system in a fixed order. SA node (pacemaker, E) → AV node (C) → AV... Circulation: heart, cardiac cycle, ECG, double circulation, regulation, disorders 1 answer
Given below are two statements :Statement I : The presence or absence of hymen is not a reliable indicator of virginity.Statement II : The hymen is torn during the first coitus only.In the light of the above statements, choose the correct answer from… Answer: 4. Statement I is true but Statement II is false Key idea: the hymen can be torn by many activities, so it is not a sign of virginit... Male and female reproductive systems 1 answer

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