NEET 2021 PCB Solved Paper PDF

## NEET Solved Paper 2021 ### SECTION-A (BOTANY) #### Plant Kingdom 1. Which of the following algae produce Carrageen? - Brown algae - Red algae - Blue-green algae - Green algae 2. Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as: - H...

## NEET Solved Paper 2021 ### SECTION-A (BOTANY) #### Plant Kingdom 1. Which of the following algae produce Carrageen? - Brown algae - Red algae - Blue-green algae - Green algae 2. Genera like Selaginella and Salvinia produce two kinds of spores. Such plants are known as: - Heterosorus - Homosporous - Heterosporous - Homosorus 3. Which of the following algae contains mannitol as reserve food material? - Gracilaria - Volvox - Ulothrix - Ectocarpus 4. Gemmae are present in: - Pteriodophytes - Some Gymnosperms - Some Liverworts - Mosses #### Morphology of Flowering Plants 5. Diadelphous stamens are found in: - Citrus - Pea - China rose and citrus - China rose #### Anatomy of Flowering Plants 6. Match List - 1 with List - 2 | List - 1 | List - 2 | |---|---| | Lenticels | Phellogen | | Cork cambium | Suberin deposition | | Secondary cortex | Exchange of gases | | Cork | Phelloderm | Choose the correct answer from the given options: - A-iii B-i C-iv D-ii - A-ii B-iii C-iv D-i - A-iv B-ii C-i D-iii - A-iv B-i C-iii D-ii #### Cell: The Unit of Life 8. Which of the following is an incorrect statement? - 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. - Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles. #### Match List - 1 with List - 2 | List - 1 | List - 2 | |---|---| | Cristae | Primary constriction in chromosome | | Thylakoids | Disc-shaped sacs in Golgi apparatus | | Centromere | Infoldings in mitochondria | | Cisternae | Flattened membranous sacs in stroma of plastids | Choose the correct answer from the given options: - A-i B-iv C-iii D-ii - A-iii B-iv C-i D-ii - A-ii B-iii C-iv D-i - A-iv B-iii C-ii D-i 10. When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as: - Telocentric - Sub-metacentric - Acrocentric - Metacentric #### Biomolecules 11. Which of the following are not secondary metabolites in plants? - Amino acids, glucose - Vinblastin, curcumin - Rubber, gums - Morphine, codeine #### Cell Cycle and Cell Division 12. Which of the following stages of meiosis involves division of centromere? - Metaphase II - Anaphase II - Telophase II - Metaphase I #### Transport in Plants 13. Match List -1 with List - 2 | List - 1 | List - 2 | |---|---| | Cohesion | More attraction in liquid phase | | Adhesion | Mutual attraction among water molecules | | Surface tension | Water loss in liquid phase | | Guttation | Attraction towards polar surfaces | Choose the correct answer from the options given below: - A-iii B-i C-iv D-ii - A-ii B-iii C-iv D-i - A-iv B-ii C-i D-iii - A-ii B-iv C-i D-iii #### Photosynthesis in Higher Plants 14. The first stable product of $CO_2$ fixation in sorghum is: - Oxaloacetic acid - Succinic acid - Phosphoglyceric acid - Pyruvic acid #### Plant Growth and Development 15. The site of perception of light in plants during photoperiodism is: - Stem - Axillary bud - Leaf - Shoot apex 16. The plant hormone used to destroy weeds in a field is: - NAA - 2, 4-D - IBA - IAA 17. Plants follow different pathways in response to environment or phase of life to form different kinds of structures. This ability is called: - Flexibility - Plasticity - Maturity - Elasticity #### Reproduction of Organisms 18. Which of the following plants is monoecious? - Chara - Marchantia polymorpha - Cycas circinalis - Carica papaya #### Sexual Reproduction in Flowering Plants 19. A typical angiosperm embryo sac at maturity is: - 7- nucleate and 8-celled - 7- nucleate and 7-celled - 8- nucleate and 8- celled - 8-nucleate and 7- celled 20. The term used for transfer of pollen grains from anthers of one plant to stigma of different plant which, during pollination, brings genetically different types of pollen grains to stigma, is: - Geitonogamy - Chasmogamy - Cleistogamy - Xenogamy #### Principles of Inheritance and Variation 21. The production for gametes by the parents, formation of zygotes, the F1 and F2 plants,can be understood from a diagram called: - Punch square - Punnett square - Net square - Bullet square #### Molecular Basis of Inheritance 22. Complete the flow chart on central dogma. (A) DNA _(B)_ _(C)_ mRNA _(D)_ - (A)-Translation;(B)-Replication; (C)-Transcription;(D)- Transduction - (A)-Replication;(B)-Transcription; (C)-Translation; (D)-Protein - (A)-Transduction;(B)-Translation; (C)-Replication; (D)-Protein - (A)-Replication;(B)-Transcription (C)-Transduction;(D)-Protein #### Evolution 23. The factor that leads to Founder effect in a population is: - Genetic recombination - Mutation - Genetic drift - Natural selection #### Strategies for Enhancement in Food Production 24. Mutations in plant cells can be induced by: - Infrared rays - Gamma rays - Zeatin - Kinetin 25. Match List - 1 with List - 2 | List - 1 | List - 2 | |---|---| | Protoplast fusion | Totipotency | | Plant tissue culture | Pomato | | Meristem culture | Somaclones | | Micropropagation | Virus free plants | Choose the correct answer from the options given below: - A-ii B-i C-iv D-iii - A-iii B-iv C-i D-ii - A-iv B-iii C-ii D-i - A-iii B-iv C-ii D-i #### Biotechnology-Principles and Processes 26. During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out: - DNA - Histones - Polysaccharides - RNA 27. DNA strands on a gel stained with ethidium bromide when viewed under UV radiation, appear as: - Bright orange bands - Dark red bands - Bright blue bands - Yellow bands 28. When gene targetting involving gene amplification is attempted in an individual's tissue to treat disease, it is known as: - Gene therapy - Molecular diagnosis - Safety testing - Biopiracy 29. Which of the following is not an application of PCR (Polymerase Chain Reaction) ? - Gene amplification - Purification of isolated protein - Detection of gene mutation - Molecular diagnosis 30. Which of the following is a correct sequence of steps in a PCR (Polymerase Chain Reaction)? - Denaturation, Extension, Annealing - Extension, Denaturation, Annealing - Annealing, Denaturation, Extension - Denaturation, Annealing, Extension #### Organisms and Populations 31. Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival? - Competitive release - Mutualism - Predation - Resource Partitioning 32. Amensalism can be represented as: - Species A (+); Species B (+) - Species A (-) ; Species B (-) - Species A (+); Species B (0) - Species A (-) : Species B (0) #### Ecosystem 33. The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time is referred as: - Climax community - Standing state - Standing crop - Climax 34. Which of the following statements is not correct ? - Pyramid of biomass in sea is generally upright. - Pyramid of energy is always upright. - Pyramid of numbers in a grassland ecosystem is upright. - Pyramid of biomass in sea is generally inverted. 35. In the equation GPP - R = NPP. R represents: - Retaradation factor - Environment factor - Respiration losses - Radiant energy ### SECTION-B (BOTANY) #### Biological Classification 36. Which of the following statements is correct? - Fusion of protoplasms between two motile or non- motile gametes is called plasmogamy. - Organisms that depend on living plants are called saprophytes. - Some of the organisms can fix atmospheric nitrogen in specialized cells called sheath cells. - Fusion of two cells is called Karyogamy. #### Morphology of Flowering Plants 37.Match Column - I with Column - II | Column-I | Column-II | |---|---| | %OK(5) C1+2+(2)A(9)+1G1 | Brassicaceae | | %OK C(5) AG2 | Liliaceae | | %OK C(5) A(9) G2 | Fabaceae | | %OK2+2C4A2-4G(2) | Solanaceae | Choose the correct answer from the given options below: - A-i B-ii C-iii D-iv - A-ii B-iii C-iv D-i - A-iv B-ii C-i D-iii - A-iii B-iv C-ii D-i #### Anatomy of Flowering Plants 38. Select the correct pair. - In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue - Cells of medullary rays that form part of cambial rings - Interfascicular cambium - Loose parenchyma cells rupturing the epidermis and forming a lens-shaped opening in bark - Spongy parenchyma - Large colorless empty cells in the epidermis of grass leaves - Subsidiary cells #### Biomolecules 39. Match List - 1 with List - 2 | List - 1 | List - 2 | |---|---| | Protein | C=C double bonds | | Unsaturated fatty acid | Phosphodiester bonds | | Nucleic acid | Glycosidic bonds | | Polysaccharide | Peptide bonds | Choose the correct answer from the options given below: - A-i B-iv C-iii D-ii - A-ii B-i C-iv D-iii - A-iv B-iii C-i D-ii - A-iv B-i C-ii D-iii ### SECTION-A (ZOOLOGY) #### The Living World 51. Which one of the following belongs to the family Muscidae? - Grasshopper - Cockroach - Housefly - Fire fly #### Animal Kingdom 52. Match List-I with List - II | List - I | List - II | |---|---| | Metamerism | Coelenterata | | Canal system | Ctenophora | | Comb plates | Annelida | | Cnidoblasts | Porifera | Choose the correct answer from the given options below: - A-iv B-i C-iii D-ii - A-ii B-iii C-iv D-i - A-i B-iv C-iii D-ii - A-iv B-iii C-i D-ii 53. Which one of the following organisms bears hollow and pneumatic long bones? - Hemidactylus - Macropus - Ornithorhynchus - Neophron 54. Match the following: | List - I | List - II | |---|---| | Physalia | Pearl oyster | | Limulus | Portuguese Man of War | | Ancylostoma | Living fossil | | Pinctada | Hookworm | Choose the correct answer from the given options below: - A-iii B-iv C-i D-ii - A-ii B-iv C-ii D-i - A-iv B-i C-ii D-iii - A-ii B-iii C-i D-iv 55. Read the following statements. - Metagenesis is observed in Helminths. - Echinoderms are triploblastic and coelomate animals. - Round worms have organ-system level of body organization. - Comb plates present in ctenophores help in digestion. - Water vascular system is characteristic of Echinoderms. Choose the correct answer from the given options below: - A, B and C are correct - A, D and E are correct - B, C and E are correct - C, D and E are correct #### Structural Organisation in Animals 56. Which of the following characteristics is incorrect with respect to cockroach? - Hypopharynx lies within the cavity enclosed by the mouth parts. - In females, 7th - 9th sterna together form a genital pouch. - 10th abdominal segment in both sexes, bears a pair of anal cerci. - A ring of gastric caeca is present at the junction of midgut and hind gut. 57. Which of the following statements wrongly represents the nature of smooth muscle? - They are involuntary muscles - Communication among the cells is performed by intercalated discs - These muscles are present in the wall of blood vessels - These muscle have no striations #### Cell: The Unit of Life 58. The organelles that are included in the endomembrane system are: - Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles. - Golgi complex, Mitochondria, Ribosomes and Lysosomes. - Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes. - Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes. #### Biomolecules 59. Identify the incorrect pair. - Toxin - Abrin - Lectins - Concanavalin A - Drugs - Ricin - Alkaloids - Codeine #### Cell Cycle and Cell Division 60. The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase? - 16 - 4 - 32 - 8 61. Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature? - Zygotene - Diakinesis - Pachytene - Leptotene 62. The centriole undergoes duplication during: - Prophase - Metaphase - G2 phase - S-phase #### Digestion and Absorption 63. Succus entericus is referred to as: - Intestinal juice - Gastric juice - Chyme - Pancreatic juice 64. Sphincter of oddi is present at: - Junction of hepato-pancreatic duct and duodenum - Gastro-oesophageal junction - Junction of jejunum and duodenum - Ileo-caecal junction #### Breathing and Exchange of Gases 65. The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are: - pO2 = 40 and pCO2 = 45 - pO2 = 95 and pCO2 = 40 - pO2 = 159 and pCO2 = 0.3 - pO2 = 104 and pCO2 = 40 66. Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli. - Low pO2, high pCO2, more H+, higher temperature - High pO2, high pCO2, less H+, higher temperature - Low pO2, low pCO2, more H+, higher temperature - High pO2, low pCO2, less H+, lower temperature #### Body Fluids and Circulation 67. Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins? - Renin - Epinephrine - Thrombokinase - Thrombin 68. Persons with 'AB' blood group are called as “Universal recipients”. This is due to: - Absence of antigens A and B in plasma - Presence of antibodies, anti-A and anti-B, on RBCS - Absence of antibodies, anti-A and anti-B, in plasma - Absence of antigens A and B on the surface of RBCS #### Locomotion and Movement 69. Chronic auto immune disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as: - Muscular dystrophy - Myasthenia gravis - Gout - Arthritis #### Chemical Coordination and Integration 70. Erythropoietin hormone which stimulates R.B.C. formation is produced by: - The cells of rostral adenohypophysis - The cells of bone marrow - Juxtaglomerular cells of the kidney - Alpha cells of pancreas. #### Human Reproduction 71. Receptors for sperm binding in mammals are present on: - Vitelline membrane - Perivitelline space - Zona pellucida - Corona radiata #### Reproductive Health 72. Match List-I with List-II. | List - I | List - II | |---|---| | Vaults | Entry of sperm through Cervix is blocked | | IUDs | Removal of Vas deferens | | Vasectomy | Phagocytosis of sperms within the Uterus | | Tubectomy | Removal of fallopian tube | Choose the correct answer from the given options below: - A-i B-iii C-ii D-iv - A-ii B-iv C-iii D-i - A-iii B-i C-iv D-ii - A-iv B-ii C-i D-iii 73. Venereal diseases can spread through - Using sterile needles - Transfusion of blood from infected person - Infected mother to foetus - Kissing - Inheritance Choose the correct answer from the given options below: - B, C and D only - B and C only - A and C only - A, B and C only 74. Which one of the following is an example of Hormone releasing IUD? - LNG 20 - Cu 7 - Multiload 375 - CuT #### Principles of Inheritance and Variation 75. In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased? - 75% - 25% - 100% - 50% #### Molecular Basis of Inheritance 76. If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it? - T: 20; G: 20; C: 30 - T: 30; G: 20; C: 20 - T: 20; G: 25; C : 25 - T: 20; G: 30; C : 20 77. Which is the “Only enzyme” that has “Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes? - DNA dependent RNA polymerase - DNA Ligase - DNase - DNA dependent DNA polymerase 78. Which of the followingh RNAs is not required for the synthesis of protein? - tRNA - rRNA - siRNA - mRNA #### Biotechnology-Principles and Processes 48. $CH_3CH_2COO^-Na^+$ -----> $ CH_3CH_3 + Na_2CO_3$. Consider the above reaction and identify the missing reagent/chemical. - Red Phosphorus - CaO - DIBAL-H - $B_2H_6$ 49. Match List-I with List-II. | List - I | List - II | |---|---| | $CO_2$ HCI, Anhyd. AlCl3/CuCl | Hell-Volhard-Zelinsky reaction | | R-C-CH3 + NaOX -> | Gattermann-Koch reaction | Choose the correct answer from the options given below: - A-iii B-ii C-i D-iv - A-i B-iv C-iii D-ii - A-ii B-iii C-iv D-i - A-iv B-i C-ii D-iii 50. The reagent 'R' in the given sequence of chemical reaction is: - $CH_3CH_2OH$ - HI - $CuCN/KCN$ - $H_2O$ #### Answer Key | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | b | c | d | c | b | a | d | d | b | d | a | b | d | a | c | b | b | | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | | a | d | d | b | b | c | b | a | a | a | a | b | d | d | d | b | a | | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | | c | a | d | b | d | b | d | c | a | c | a | a | a | d | c | d | b | | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | | a | d | b | d | c | c | a | c | a | d | a | d | d | b | d | ### SECTION-A (ZOOLOGY) #### The Living World 51. Which one of the following belongs to the family Muscidae? - Grasshopper - Cockroach - Housefly - Fire fly #### Animal Kingdom 52. Match List-I with List - II | List - I | List - II | |---|---| | Metamerism | Coelenterata | | Canal system | Ctenophora | | Comb plates | Annelida | | Cnidoblasts | Porifera | Choose the correct answer from the given options below: - A-iv B-i C-iii D-ii - A-ii B-iii C-iv D-i - A-i B-iv C-iii D-ii - A-iv B-iii C-i D-ii 53. Which one of the following organisms bears hollow and pneumatic long bones? - Hemidactylus - Macropus - Ornithorhynchus - Neophron 54. Match the following: | List - I | List - II | |---|---| | Physalia | Pearl oyster | | Limulus | Portuguese Man of War | | Ancylostoma | Living fossil | | Pinctada | Hookworm | Choose the correct answer from the given options below: - A-iii B-iv C-i D-ii - A-ii B-iv C-ii D-i - A-iv B-i C-ii D-iii - A-ii B-iii C-i D-iv 55. Read the following statements. - Metagenesis is observed in Helminths. - Echinoderms are triploblastic and coelomate animals. - Round worms have organ-system level of body organization. - Comb plates present in ctenophores help in digestion. - Water vascular system is characteristic of Echinoderms. Choose the correct answer from the given options below: - A, B and C are correct - A, D and E are correct - B, C and E are correct - C, D and E are correct #### Structural Organisation in Animals 56. Which of the following characteristics is incorrect with respect to cockroach? - Hypopharynx lies within the cavity enclosed by the mouth parts. - In females, 7th - 9th sterna together form a genital pouch. - 10th abdominal segment in both sexes, bears a pair of anal cerci. - A ring of gastric caeca is present at the junction of midgut and hind gut. 57. Which of the following statements wrongly represents the nature of smooth muscle? - They are involuntary muscles - Communication among the cells is performed by intercalated discs - These muscles are present in the wall of blood vessels - These muscle have no striations #### Cell: The Unit of Life 58. The organelles that are included in the endomembrane system are: - Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles. - Golgi complex, Mitochondria, Ribosomes and Lysosomes. - Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes. - Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes. #### Biomolecules 59. Identify the incorrect pair. - Toxin - Abrin - Lectins - Concanavalin A - Drugs - Ricin - Alkaloids - Codeine #### Cell Cycle and Cell Division 60. The fruit fly has 8 chromosomes (2n) in each cell. During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase? - 16 - 4 - 32 - 8 61. Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature? - Zygotene - Diakinesis - Pachytene - Leptotene 62. The centriole undergoes duplication during: - Prophase - Metaphase - G2 phase - S-phase #### Digestion and Absorption 63. Succus entericus is referred to as: - Intestinal juice - Gastric juice - Chyme - Pancreatic juice 64. Sphincter of oddi is present at: - Junction of hepato-pancreatic duct and duodenum - Gastro-oesophageal junction - Junction of jejunum and duodenum - Ileo-caecal junction #### Breathing and Exchange of Gases 65. The partial pressures (in mm Hg) of oxygen (O2) and carbon dioxide (CO2) at alveoli (the site of diffusion) are: - pO2 = 40 and pCO2 = 45 - pO2 = 95 and pCO2 = 40 - pO2 = 159 and pCO2 = 0.3 - pO2 = 104 and pCO2 = 40 66. Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli. - Low pO2, high pCO2, more H+, higher temperature - High pO2, high pCO2, less H+, higher temperature - Low pO2, low pCO2, more H+, higher temperature - High pO2, low pCO2, less H+, lower temperature #### Body Fluids and Circulation 67. Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins? - Renin - Epinephrine - Thrombokinase - Thrombin 68. Persons with 'AB' blood group are called as “Universal recipients”. This is due to: - Absence of antigens A and B in plasma - Presence of antibodies, anti-A and anti-B, on RBCS - Absence of antibodies, anti-A and anti-B, in plasma - Absence of antigens A and B on the surface of RBCS #### Locomotion and Movement 69. Chronic auto immune disorder affecting neuromuscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as: - Muscular dystrophy - Myasthenia gravis - Gout - Arthritis #### Chemical Coordination and Integration 70. Erythropoietin hormone which stimulates R.B.C. formation is produced by: - The cells of rostral adenohypophysis - The cells of bone marrow - Juxtaglomerular cells of the kidney - Alpha cells of pancreas. #### Human Reproduction 71. Receptors for sperm binding in mammals are present on: - Vitelline membrane - Perivitelline space - Zona pellucida - Corona radiata #### Reproductive Health 72. Match List-I with List-II. | List - I | List - II | |---|---| | Vaults | Entry of sperm through Cervix is blocked | | IUDs | Removal of Vas deferens | | Vasectomy | Phagocytosis of sperms within the Uterus | | Tubectomy | Removal of fallopian tube | Choose the correct answer from the given options below: - A-i B-iii C-ii D-iv - A-ii B-iv C-iii D-i - A-iii B-i C-iv D-ii - A-iv B-ii C-i D-iii 73. Venereal diseases can spread through - Using sterile needles - Transfusion of blood from infected person - Infected mother to foetus - Kissing - Inheritance Choose the correct answer from the given options below: - B, C and D only - B and C only - A and C only - A, B and C only 74. Which one of the following is an example of Hormone releasing IUD? - LNG 20 - Cu 7 - Multiload 375 - CuT #### Principles of Inheritance and Variation 75. In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased? - 75% - 25% - 100% - 50% #### Molecular Basis of Inheritance 76. If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it? - T: 20; G: 20; C: 30 - T: 30; G: 20; C: 20 - T: 20; G: 25; C : 25 - T: 20; G: 30; C : 20 77. Which is the “Only enzyme” that has “Capability" to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes? - DNA dependent RNA polymerase - DNA Ligase - DNase - DNA dependent DNA polymerase 78. Which of the followingh RNAs is not required for the synthesis of protein? - tRNA - rRNA - siRNA - mRNA #### Biotechnology-Principles and Processes 48. $CH_3CH_2COO^-Na^+$ -----> $ CH_3CH_3 + Na_2CO_3$. Consider the above reaction and identify the missing reagent/chemical. - Red Phosphorus - CaO - DIBAL-H - $B_2H_6$ 49. Match List-I with List-II. | List - I | List - II | |---|---| | $CO_2$ HCI, Anhyd. AlCl3/CuCl | Hell-Volhard-Zelinsky reaction | | R-C-CH3 + NaOX -> | Gattermann-Koch reaction | Choose the correct answer from the options given below: - A-iii B-ii C-i D-iv - A-i B-iv C-iii D-ii - A-ii B-iii C-iv D-i - A-iv B-i C-ii D-iii 50. The reagent 'R' in the given sequence of chemical reaction is: - $CH_3CH_2OH$ - HI - $CuCN/KCN$ - $H_2O$ #### Answer Key | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| | b | c | d | c | b | a | d | d | b | d | a | b | d | a | c | b | b | | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | | a | d | d | b | b | c | b | a | a | a | a | b | d | d | d | b | a | | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 4