NEET 2023

99 Questions • 180 Minutes • 2023

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Q21
In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially are:
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Q22
What is the function of tassels in the corn cob?
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Q23
The phenomenon of pleiotropism refers to
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Q24
Frequency of recombination between gene pairs on same chromosome as a measure of the distance between genes to map their position on chromosome, was used for the first time by
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Q25
What is the role of RNA polymerase III in the process of transcription in Eukaryotes?
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Q26
Expressed Sequence Tags (ESTs) refers to
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Q27
Unequivocal proof that DNA is the genetic material was first proposed by
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Q28
Upon exposure to UV radiation, DNA stained with ethidium bromide will show
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Q29
In gene gun method used to introduce alien DNA into host cells, microparticles of ______ metal are used.
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Q30
During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out
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Q31
Identify the correct statements: A. Detrivores perform fragmentation B. The humus is further degraded by some microbes during mineralization. C. Water soluble inorganic nutrients go down into the soil and get precipitated by a process called leaching. D. The detritus food chain begins with living organisms. E. Earthworms break down detritus into smaller particles by a process called catabolism. Choose the correct answer from the options given below:
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Q32
In the equation GPP – R = NPP GPP is Gross Primary Productivity NPP is Net Primary Productivity. R here is
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Q33
The historic Convention on Biological Diversity, ‘The Earth Summit’ was held in Rio de Janeiro in the year:
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Q34
Among ‘The Evil Quartet’, which one is considered the most important cause driving extinction of species?
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Q35
The thickness of ozone in a column of air in the atmosphere is measured in terms of:
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Q36
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: In gymnosperms the pollen grains are released from the microsporangium and carried by air currents. Reason R: Air currents carry the pollen grains to the mouth of the archegonia where the male gametes are discharged and pollen tube is not formed. In the light of the above statements, choose the correct answer from the options given below:
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Q37
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R: Assertion A: A flower is defined as modified shoot wherein the shoot apical meristem changes to floral meristem. Reason R: Internode of the shoot gets condensed to produce different floral appendages laterally at successive nodes instead of leaves. In the light of the above statements, choose the correct answer from the options given below:
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Q38
Identify the correct statements: A. Lenticels are the lens-shaped openings permitting the exchange of gases. B. Bark formed early in the season is called hard bark. C. Bark is a technical term that refers to all tissues exterior to vascular cambium. D. Bark refers to periderm and secondary phloem. E. Phellogen is single-layered in thickness. Choose the correct answer from the options given below:
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Q39
Melonate inhibits the growth of pathogenic bacteria by inhibiting the activity of
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Q40
Match List-I with List-II [table] List-I | List-II ; A. M Phase | I. Proteins are synthesized ; B. G2 Phase | II. Inactive phase ; C. Quiescent stage | III. Interval between mitosis and initiation of DNA replication ; D. G1 Phase | IV. Equational division [/table] Choose the correct answer from the options given below:
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Paper Info
  • Exam: NEET
  • Year: 2023
  • Questions: 99
  • Duration: 180 mins
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