2021 jam.pdf

JAM 2021 BIOTECHNOLOGY - BT Paper Specific Instructions 1. The examination is of 3 hours duration. There are a total of 60 questions carrying 100 marks. The entire paper is divided into three sections, A, B and...

JAM 2021 BIOTECHNOLOGY - BT Paper Specific Instructions 1. The examination is of 3 hours duration. There are a total of 60 questions carrying 100 marks. The entire paper is divided into three sections, A, B and C. All sections are compulsory. Questions in each section are of different types. 2. Section – A contains a total of 30 Multiple Choice Questions (MCQ). Each MCQ type question has four choices out of which only one choice is the correct answer. Questions Q.1 – Q.30 belong to this section and carry a total of 50 marks. Q.1 – Q.10 carry 1 mark each and Questions Q.11 – Q.30 carry 2 marks each. 3. Section – B contains a total of 10 Multiple Select Questions (MSQ). Each MSQ type question is similar to MCQ but with a difference that there may be one or more than one choice(s) that are correct out of the four given choices. The candidate gets full credit if he/she selects all the correct answers only and no wrong answers. Questions Q.31 – Q.40 belong to this section and carry 2 marks each with a total of 20 marks. 4. Section – C contains a total of 20 Numerical Answer Type (NAT) questions. For these NAT type questions, the answer is a real number which needs to be entered using the virtual keyboard on the monitor. No choices will be shown for these type of questions. Questions Q.41 – Q.60 belong to this section and carry a total of 30 marks. Q.41 – Q.50 carry 1 mark each and Questions Q.51 – Q.60 carry 2 marks each. 5. In all sections, questions not attempted will result in zero mark. In Section – A (MCQ), wrong answer will result in NEGATIVE marks. For all 1 mark questions, 1/3 marks will be deducted for each wrong answer. For all 2 marks questions, 2/3 marks will be deducted for each wrong answer. In Section – B (MSQ), there is NO NEGATIVE and NO PARTIAL marking provisions. There is NO NEGATIVE marking in Section – C (NAT) as well. 6. Only Virtual Scientific Calculator is allowed. Charts, graph sheets, tables, cellular phone or other electronic gadgets are NOT allowed in the examination hall. 7. The Scribble Pad will be provided for rough work. BT 1/12 JAM 2021 BIOTECHNOLOGY - BT SECTION – A MULTIPLE CHOICE QUESTIONS (MCQ) Q. 1 – Q.10 carry one mark each. Q.1 An acid contains C, H and O atoms. On combustion analysis, 0.454 g of the acid gives 0.418 g of H2O and 1.023 g of CO2. What is the empirical formula of the acid? (A) C4H5O2 (B) C3H6O (C) CH2O (D) C5H8O Q.2 Ethylbutyrate is responsible for the odor of pineapple. Which one of the following is the structure of ethyl butyrate? (A) (B) (C) (D) Q.3 If the blood groups of mother and father are AB and O, respectively, what are the blood groups possible for their child? (A) AB or A (B) AB (C) A or B (D) AB, A, B or O Q.4 Which one of the following features distinguishes between gymnosperms and angiosperms? (A) Seed formation (B) Vascular tissues (C) Seed cover (D) Gamete production Q.5 Ecosystem ecology is the study of (A) An organism’s behavior towards environmental challenges (B) Factors that affect the interactions of individuals in a population (C) Interactions among biotic and abiotic components (D) Factors that affect the interactions among communities in an ecosystem Q.6 Bacterial strains that do not grow in the absence of a specific nutrient are called (A) Heterotrophs (B) Chemotrophs (C) Autotrophs (D) Auxotrophs Q.7 The type of immunological protection provided by plasma therapy is (A) Natural active (B) Natural passive (C) Artificial active (D) Artificial passive BT 2/12 JAM 2021 BIOTECHNOLOGY - BT Q.8 Which one of the following components of bacterial cell acts as endotoxin? (A) Peptidoglycan of Gram-positive bacteria (B) Lipopolysaccharide (C) Porins (D) Peptidoglycan of Gram-negative bacteria Q.9 The moment of force in terms of fundamental dimensions is (A) MLT−1 (B) MLT−2 (C) ML−1T−1 (D) ML2T−2 2 1 Q.10 Let 𝐴 = ( ) and 𝐵 = (2 −5). If 𝐴𝑋 + 3𝐵 = 0, then the determinant of 𝑋 is 1 1 0 1 (A) −18 (B) −6 (C) 6 (D) 18 Q. 11 – Q. 30 carry two marks each. Q.11 In a genetic cross between plants bearing violet flowers and green seeds (VVGG), and white flower and yellow seeds (vvgg), the following phenotypic distribution was obtained in the F2 progeny (assume both parents to be pure breeding for both the traits, and self-cross at F1 generation): i) 2340 plants with violet flowers and green seeds ii) 47 plants with violet flowers and yellow seeds iii) 43 plants with white flowers and green seeds iv) 770 plants with white flowers and yellow seeds Which one of the following interpretations explains the above phenotypic distribution? (A) Same genes control both flower and seed colors (B) Genes for flower and seed colors are genetically interacting (C) Genes for flower and seed colors are present on the same chromosome (D) Flower color in this plant species is a polygenic trait Q.12 IUPAC name of the following molecule is (A) 3-Bromo-3,5-dimethyl hexane (B) 4-Bromo-2,4-dimethyl hexane (C) 3-Bromo-2-isobutyl butane (D) 4-Bromo-2-methyl-4-ethyl pentane BT 3/12 JAM 2021 BIOTECHNOLOGY - BT Q.13 Which one of the following features/properties does glucose acquire through intramolecular hemiacetal formation? (A) Ability to function as a reducing agent (B) An additional chiral carbon (C) Ability to form anhydride linkage with non-carbohydrate moieties such as the inorganic phosphate (D) Ability to form epimers Q.14 The following methylation is carried out in various solvents such as benzene, tetrahydrofuran (THF), dimethoxyethane (DME), dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF). Which one of the following is TRUE for the effect of solvent on the reaction rate? (A) DMSO > DMF > DME > THF > Benzene (B) Benzene > THF > DME > DMF > DMSO (C) DME > DMSO > DMF > THF > Benzene (D) THF > Benzene > DME > DMSO > DMF Q.15 Which one of the following is the major product of the hydrogenation reaction given below? (A) (B) (C) (D) BT 4/12 JAM 2021 BIOTECHNOLOGY - BT Q.16 Which one of the following isomers is thermodynamically most stable? (A) (B) (C) (D) Q.17 What is the significance of the isomerization of glucose 6-phosphate to fructose 6-phosphate for the progression of glycolysis? (A) As functional groups, ketones are more reactive than aldehydes (B) Cleavage of glucose 1,6-bisphosphate will not yield dihydroxy acetone phosphate and glyceraldehyde 3-phosphate (C) The carbonyl group at carbon-2 (C-2) in fructose facilitates the cleavage of the bond between C-3 and C-4 (D) Phosphorylation of glucose 6-phosphate to glucose 1,6-bisphosphate is irreversible Q.18 What is the role of bile salts in the mammalian digestive system? (A) Bile salts convert pepsinogen to pepsin, and thus facilitate protein digestion (B) Bile salts emulsify fat, and thus aid in fat digestion (C) Bile salts are excretory products produced by the liver, and do not participate in digestion (D) Bile salts facilitate digestion of all types of macromolecules in the small intestine Q.19 Presence of which one of the following in the urine indicates pregnancy in human? (A) Progesterone (B) Follicle-stimulating hormone and luteinizing hormone (C) Estrogen (D) Human chorionic gonadotropin Q.20 Which one of the following processes emerged earliest during the course of evolution? (A) Antigen presentation (B) Antibody production (C) Phagocytosis (D) Thymic education BT 5/12 JAM 2021 BIOTECHNOLOGY - BT Q.21 Which one of the following microscopic techniques provides a 3-dimensional perspective of live, unstained and transparent specimens obtained from the wild? (A) Confocal microscopy (B) Fluorescence microscopy (C) Phase contrast microscopy (D) Differential interference contrast (Nomarski) microscopy Q.22 Which one of the following represents the motion of an object with a positive acceleration? (A) (B) (C) (D) Q.23 A stationary enemy ship is docked in the sea at a distance of 1.0 km from the coastline. A gun located at the sea level on the coastline can fire projectiles at a velocity of 120 m/s. What is the angle (in degrees) above the horizontal at which the gun must fire to hit the ship? [g = 9.8 m/s2] (A) 21.4 (B) 42.9 (C) 23.6 (D) 47.1 Q.24 1 1 If 𝑥 + = 1, then the value of 𝑥 6 + is 𝑥 𝑥6 (A) −2 (B) −1 (C) 1 (D) 2 Q.25 0, 0≤𝑥