Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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61.

The objective of 'Ramsar Convention' was

  • forest conservation

  • wildlife conservation

  • wetland conservation

  • biodiversity conservation


C.

wetland conservation

Ramsar convention is an intergovernmental treaty whose objective is the conservation and sustainable utilisation of wetlands. This convention was named after the city of Ramsar in Iran and the convention was signed in 1971 and was effective from 25 december, 1975. The Ramsar list of wetlands of internation importance new includes over 2,000 sites known as Ramsar sites.


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62.

Which of the following human parasites require mosquito to complete their life-cycle?

  • Ascaris tumbricoides and Wuchereria bancrofti

  • Leishmania donovani and Plasmodium ovale

  • Ascaris lumbricoides and Leishmania donovani

  • Wuchereria bancrofti and Plasmodium ovale


63.

In which diagnostic system, piezoelectric effect and reverse piezoelectric effect are involved?

  • EEG

  • CAT

  • USG

  • MRI


64.

Main cause of eutrophication is

  • fluctuation of temperature

  • unusual growth of aquatic vegetations

  • enrichment of nutrients

  • abundance of microorganisms


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65.

The removal of 'Keystone' species will affect the

  • producers

  • consumers

  • ecosystem

  • decomposers


66.

If the sequence of bases in the coding strand of a double-stranded DNA is 5'-GTTCGAGTC-3', the sequence of bases in its transcript will be

  • 5'-GACUCGAAC-3'

  • 5'-CAAGCUCAG-3'

  • 5'-GUUCGAGUC-3'

  • 5'-CUGAGCUUG-3'


67.

Immunity that develops in the foetus after receiving antibodies from mother's blood through placenta is

  • naturally acquired active immunity

  • artificially acquired active immunity

  • naturally acquired passive immunity

  • artificially acquired passive immunity


68.

Which of the following processes was discovered by Lederberg and Tatum (1946)?

  • Transduction

  • Transformation

  • Asexual reproduction

  • Conjugation


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69.

The component of bacteria that retains the crystal violet stain during Gram staining is

  • O- antigen

  • lipopolysaccharide

  • peptidoglycan

  • cytoplasmic membrane


70.

During gene cloning, the enzyme used to join the insert DNA with the plasmid vector is

  • DNA ligase

  • restriction endonuclease

  • alkaline phosphatase

  • exonuclease


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