12th Biology Model Question 2024 (part-2)

36-Which of the following micro-organisms is utilized to prepare “SwissCheese” ?

• (A) Penicillium roqueforti
• (B) Propionibacterium sharmanii
• (C) Yeast
• (D) Lactic acid bacteria
• option2
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37-Who established that penicillin is an effective antibiotic ?

• (A) Alexander Fleming
• (B) Ernst Chain and Howard Florey
• (C) Robert Koch
• (D) Pasteur
• option2
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38-Which of the following rejects graft / transplant ?

• (A) Physiological barriers
• (B) Cellular barriers
• (C) Acquired Immunity
• (D) Cell mediated Immunity
• option4
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39-Atlas 66, is related to which of the following crop ?

• (A) Wheat
• (B) Rice
• (C) Maize
• (D) Tomato
• option1
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40-Mating of more closely related individuals within the same breed for 4-6 generations is called as

• (A) Cross breeding
• (B) Inbreeding
• (C) Outbreeding
• (D) Out crossing
• option2
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41-Which type of charges are present on DNA ?

• (A) Negative charge
• (B) Positive charge
• (C) No charge
• (D) Variable
• option1
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42-What is elution ?

• (A) Extraction of DNA fragment from the agarose gel pieces
• (B) Separation of fragments of DNA
• (C) Ligating DNA with cloning vector
• (D) Staining DNA with ethidium bromide
• option1
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43-Which of the following processes is utilized to introduce DNA fragment into bacteria ?

• (A) Micro-injection
• (B) Transformation
• (C) Gene gun
• (D) With the help of T.DNA
• option2
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44-What is done to make bacterial cell competent to take up DNA ?

• (A) Treating bacterial cell with divalent cation.
• (B) Treating bacterial cell with divalent anion.
• (C) Incubating bacterial cell and recombinant DNA on ice.
• (D) Exposing bacterial cell to heat shock.
• option1
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45-What is added for precipitation of purified DNA during isolation of DNA?

• (A) Methanol
• (B) Calcium
• (C) Protease
• (D) Ethanol
• option3
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46-Where is the recognition site - Bam H 1 present in pBR322 ?

• (A) Ampicillin resistance gene
• (B) Ori
• (C) Tetracycline resistance gene
• (D) rop
• option3
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47-Which of the following is selectable marker gene in pBR322 ?

• (A) tetR gene
• (B) ampR gene
• (C) Both A and B
• (D) None
• option3
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48-Which of the following is not required for PCR ?

Ans. - option1,option3

49-Which of the following compounds controls the cotton bollworms ?

• (A) Proteins encoded by cry1AC and cry2AB
• (B) Protein encoded by cry1AB
• (C) Amino acids known as Opines
• (D) Recombinant protein
• option1
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50-Which of the following human protein is present in milk of transgenic cow ‘Rosie’ ?

• (A) Alpha lactalbumin
• (B) Humulin
• (C) Glycoproteins
• (D) Beta galactosidase
• option1
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51-Golden rice is rich in which of the following ?

• (A) Vitamin B1
• (B) Vitamin B2
• (C) Vitamin C
• (D) Vitamin A
• option4
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52-Which of the following is not an advantage of GM crops ?

• (A) Development of crops more tolerant to abiotic stresses
• (B) Development of pest resistant plants
• (C) Increase in nutritional value of food
• (D) To make somatic hybridization easy
• option4
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53-For which of the following human diseases, transgenic model is not available ?

• (A) Cancer
• (B) Cystic fibrosis
• (C) Alzheimer
• (D) Malaria
• option4
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54-On which of the following varieties an American Company got patent rights in 1977 ?

• (A) IR 8
• (B) Jaya
• (C) Padma
• (D) Semi-dwarf variety of Basmati
• option4
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55-Which of the following statement is incorrect about synthesis of genetically engineered insulin ?

• (A) Synthesis of separate DNA sequences for chain A and B of insulin
• (B) DNA sequences for chain A and B were ligated with plasmid of E.coli
• (C) Separate synthesis of chain A and B
• (D) Chain A and Chain B were linked with hydrogen bonds to form human insulin.
• option4
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56-Name of M. S. Swaminathan is associated with which of the following fields ?

• (A) Ecology
• (B) Biotechnology
• (C) Green revolution
• (D) Milk production
• option3
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57-Which of the following is not included in main biomes of India ?

• (A) Tropical rain forest
• (B) Deciduous forest
• (C) Desert biome
• (D) Grass lands
• option4
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58-Organisms that can tolerate a variable wide range of temperatures are called as -

• (A) Eurythermal
• (B) Stenothermal
• (C) Cold blooded
• (D) Warm blooded
• option1
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59-Which of the following is not an attribute of population ?

• (A) Sex ratio
• (B) Population density
• (C) Birth rate
• (D) Energy flow
• option4
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60-Which plant was introduced in Australia in 1920 which caused havoc in millions of hectares of rangeland ?

• (A) Prickly pear cactus
• (B) Parthenium
• (C) Water hyacinth
• (D) Lantana
• option1
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61-Who propounded Competitive Exclusion Principle ?

• (A) Mac Arthur
• (B) Gause
• (C) Connell
• (D) Darwin
• option2
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62-Which of the following is not an example of mutualism ?

• (A) Cattle egret and cattle
• (B) Lichen
• (C) Mycorrhiza
• (D) Relationship between fig and wasp
• option1
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63-In which of the following birds, brood parasitism is observed ?

• (A) Sparrow
• (B) Pigeon
• (C) Cuckoo
• (D) Hen
• option3
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64-Which of the following statements is incorrect ?

• (A) Autotrophs convert inorganic into organic material with the help of the radiant energy
• (B) Energy flow is circular
• (C) Heterotrophs feed on autotrophs
• (D) Decomposers, decompose matter of dead organisms.
• option2
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65-How many varieties of mangoes are found in India ?

• (A) More than 50,000
• (B) More than 1,000
• (C) More than 10,000
• (D) More than 3,000
• option2
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66-According to IUCN, how many animal and plant species occur on earth

• (A) Slightly more than 1.5 million
• (B) 7 million
• (C) 20-25 million
• (D) 3 million
• option2
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67-Tilman’s experiments are related to which of the following ?

• (A) Conservation
• (B) Significance of species diversity in ecosystem
• (C) Energy flow
• (D) Bio-diversity
• option2
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68-What is the main reason for extinction of Steller’s sea cow ?

• (A) Habitat loss and fragmentation
• (B) Over explotation
• (C) Alien species invasion
• (D) Coextinction
• option2
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69-Which of the following metals is not utilized in catalytic converters ?

• (A) Platinum
• (B) Palladium
• (C) Rhodium
• (D) Polonium
• option4
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70-Which of the following statements is incorrect about use of pesticides?

• (A) Used for enhancing crop production
• (B) Not harmful for non-target organisms
• (C) Bio-magnification
• (D) Manifold increase in use of pesticides
• option2
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