Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

Which one of the given pollination technique/adaptation is different than others?

  • Herkogamy

  • Geitonogamy

  • Dichogamy

  • Heterostyly


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42.

The phenotypic ratio of trihybrid cross in F2-generation is

  •  27: 9: 9: 9 : 3 : 3 : 3: 1

  • 9 : 3 : 3 : 1

  • 1 : 4 : 6 : 4 : 1

  • 27 : 9 : 3 : 3 : 9 : 1 : 2 : 1


A.

 27: 9: 9: 9 : 3 : 3 : 3: 1

The phenotypic ratio of trihybrid cross in Fz-generation will be 27:9:9:9:3:3 :3:1.


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43.

A point mutation where guanine is replaced by cytosine is also called

  • Frameshift mutation

  • Transition mutation

  • Translocation mutation

  • Transversion mutation


44.

Which one of the following antibodies play an important role as mediator in allergic response?

  • IgE

  • IgG

  • IgD

  • IgA


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45.

Which one of the following human ancestors is known as tool maker?

  • Homo erectus

  • Java man

  • Homo habilis

  • Heidelberg man


46.

Which one of the following is a matching pair of vector and the disease?

  • Culex – Filariasis

  •  Housefly – Leprosy

  • Aedes aegypti – Chickenpox

  • Sandfly – Cholera


47.

Consider these following sentences and choose the correct ones.

(I) Each gene contains a specific promoter region and a leader sequence for guiding the beginning of transcription.

(II) Only one strand of DNA, called template strand is copied by RNA polymerase this strand runs in 3ʹ → 5ʹ direction.

(III) RNA polymerase adds complementary nucleotides forming single strand mRNA in 3ʹ → 5ʹ direction.

(IV) Section of DNA that has been transcribed is rewound into its original configuration.

  • II, III and IV

  • II and IV

  • I, II and IV

  • I, II, and IV


48.

In animals normally which organism has a maximum number of chromosomes?

  • Butterfly

  • Elephant

  • Hermit crab

  • Chimpanzee


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49.

During meiosis-I, the bivalent chromosomes clearly appear as tetrads during

  • Diakinesis

  • Diplotene

  • Pachytene

  • Zygotene


50.

Snapdragon flower is an exception of Mendel’s laws. It is a good example of

  • Law of dominance

  • Complementary gene

  • Codominance

  • Incomplete dominance


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