Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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41.

The binding site of tRNA with mRNA & amino acids respectively are

  • mRNA with DHU loop and amino acid with CCA end.

  • mRNA with CCA end and amino acid with anticodon loop

  • mRNA with anticodon loop and amino acid with DHU loop

  • mRNA with anticodon loop and amino acid with CCA end


D.

mRNA with anticodon loop and amino acid with CCA end

The binding site of tRNA with mRNA is anticodon loop and with amino acid is CCA end.


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42.

Percentage of recombination between A and B is 9%, A and C is 17%, B and C is 26% , then the arrangement of genes is

  • ABC

  • ACB

  • BCA

  • BAC


43.

Rain is called acid - rain when its pH is below

  • 7

  • 6.5

  • 6

  • 5.6


44.

Cytokines that provide non- specific immnity against virus are

  • interlukin

  • tumour necrosis

  • colony stimulating

  • interferon


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45.

By all of the following ways bacteria become resistant to antibiotic except

  • making enzymes that inactivate the drug

  • becoming impermeable to the drug

  • modifying the target of the drug

  • moving away from the drug


46.

Which of the following conditions represents a case of co-dominant genes?

  • A gene expresses itself, suppressing the phenotypic effect of its alleles

  • Genes that are similar in phenotypic effect when present separately, but when together interact to produce a different trait

  • Alleles, both of which interact to produce a trait, which may or may not resemble either of the parental types

  • Alleles, each of which produces an independent effect in a heterozygous condition


47.

The first bioherbicide developed in 1981 was based on

  • Phytophthora palmivora

  • Phytophthora infestans

  • Bacillus thuringiensis

  • Azadirachta indica


48.

Upon fertilization, what structure develops from carpel?

  • Testa

  • Tegmen

  • Pericarp

  • Perisperm


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49.

Assertion : Secondary succession takes place in recently denuded area.

Reason : It is caused due to baring of an area.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


50.

Assertion : Mammary glands are apocrine glands.

Reason : The distal part containing secretory granules break down and leaves as a secretion.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false


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