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NEET-XII-Biology
Previous Year Paper year:2022
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- Qstn #15Which of the following is incorrectly matched?
(A)Volvox-Starch
(B)Ectocarpus - Fucoxanthin
(C)Ulothrix - Mannitol
(D)Porphyra - Floridian StarchdigAnsr: C:
- Qstn #16What amount of energy is released from glucose during lactic acid fermentation ?
(A)Less than `` 7\% ``
(B)Approximately `` 15 \% ``
(C)More than `` 18 \% ``
(D)About `` 10\% ``digAnsr: A:
- Qstn #17XO type of sex determination can be found in:
(A)Monkeys
(B)Drosophila
(C)Birds
(D)GrasshoppersdigAnsr: D:
- Qstn #18What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid ?
(A)Eight
(B)Four
(C)Six
(D)TwodigAnsr: D:
- Qstn #19Match List - I with List - II.
Choose the correct answer from the options given below:List I List II a Manganese i Activates the enzyme catalase b Magnesium ii Required for pollen germination c Boron iii Activates enzymes of respiration d Iron iv Functions in splitting of water during photosynthesis
(A)
(a) - (iii),
(b) - (i),
(c) - (ii),
(d) - (iv)
(B)
(a) - (iii),
(b) - (iv),
(c) - (i),
(d) - (ii)
(C)
(a) - (iv),
(b) - (iii),
(c) - (ii),
(d) - (i)
(D)
(a) - (iv),
(b)-(i),
(c) - (ii),
(d) - (iii)digAnsr: C:
- Qstn #20"Girdling Experiment" was performed by Plant Physiologists to identify the plant tissue through which :
(A)osmosis is observed
(B)Water is transported
(C)food is transported
(D)for both water and food transportationdigAnsr: C:
- Qstn #21Which of the following is not a method of ex situ conservation?
(A)Cryopreservation
(B)In vitro fertilization
(C)National Parks
(D)MicropropagationdigAnsr: C:
- Qstn #22Given below are two statements: Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microbes. Statement II : Decomposition is faster if the detritus is rich in lignin and chitin In the light of the above statements, choose the correct answer from the options given below :
(A)Statement I is incorrect but Statement II is correct
(B)Both Statement I and Statement II are correct
(C)Both Statement I and Statement II are incorrect
(D)Statement I is correct but Statement II is incorrectdigAnsr: D:
- Qstn #23Read the following statements and choose the set of correct statements : (a) Euchromatin is loosely packed chromatin (b) Heterochromatin is transcriptionally active (c) Histone octomer is wrapped by negatively charged DNA in nucleosome (d) Histones are rich in lysine and arginine (e) A typical nucleosome contains `` 400 \,bp `` of DNA helix Choose the correct answer from the options given below:
(A)
(a),
(c),
(e) Only
(B)
(b),
(d),
(e) Only
(C)
(a),
(c),
(d) Only
(D)
(b),
(e) OnlydigAnsr: C:
- Qstn #24Identify the correct set of statements : (a) The leaflets are modified into pointed harc thorns in Citrus and Bougainvillea (b) Axillary buds form slender and spirally coilec tendrils in cucumber and pumpkin (c) Stem is flattened and fleshy in Opuntia anc modified to perform the function of leaves (d) Rhizophora shows vertically upward growing roots that help to get oxygen for respiration (e) Subaerially growing stems in grasses and strawberry help in vegetative propagation Choose the correct answer from the options given below:
(A)
(a),
(b),
(d) and
(e) Only
(B)
(b) and
(c) Only
(C)
(a) and
(d) Only
(D)
(b),
(c),
(d) and
(e) OnlydigAnsr: D:
- Qstn #25Which one of the following produces nitrogen fixing nodules on the roots of Alnus?
(A)Beijernickia
(B)Rhizobium
(C)Frankia
(D)RhodospirillumdigAnsr: C:
- Qstn #26Which one of the following plants shows vexillary aestivation and diadelphous stamens ?
(A)Solanum nigrum
(B)Colchicum autumnale
(C)Pisum sativum
(D)Allium cepadigAnsr: C:
- Qstn #27Given below are two statements: Statement I: Cleistogamous flowers are invariably autogamous Statement II : Cleistogamy is disadvantageous as there is no chance for cross pollination In the light of the above statements, choose the correct answer from the options given below:
(A)Statement I is incorrect but Statement II is correct
(B)Both Statement I and Statement II are correct
(C)Both Statement I and Statement II are incorrect
(D)Statement I is correct but Statement II is incorrectdigAnsr: B:
- Qstn #28The process of translation of `` mRNA `` to proteins begins as soon as :
(A)The tRNA is activated and the larger subunit of ribosome encounters mRNA
(B)The small subunit of ribosome encounters mRNA
(C)The larger subunit of ribosome encounters mRNA
(D)Both the subunits join together to bind with mRNAdigAnsr: B:
- Qstn #29The device which can remove particulate matter present in the exhaust from a thermal power plant is :
(A)Catalytic Convertor
(B)STP
(C)Incinerator
(D)Electrostatic PrecipitatordigAnsr: D: