Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

41.

Sugarcane show high efficiency of CO2 fixation because of :

  • Calvin cycle

  • Hatch and Slack cycle

  • TCA cycle

  • greater sunlight


42.

The plant ash is an indication of :

  • organic matter of plant

  • waste product

  • mineral salts absorbed by plants

  • none of these


43.

Which of the following fungi is found useful in the biological control of plant disease ?

  • Penicillium notatum

  • Phytophthora parasitica

  • Mucor mucido

  • Trichoderma viridae


44.

Which is synthesized in G1 phase ?

  • DNA polymerase

  • Histones

  • Nucleolar DNA

  • Tubulin protein


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45.

Which of the following plant yields oil and fibre both ?

  • Cocos nucifera

  • Eucalyptus

  • Brassica campestris

  • Euphorbia hirta


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46.

Capitulum inflorescence is found in :

  • Compositae (Asteraceae)

  • Cruciferae (Brassicaceae)

  • Solanaceae

  • Malvaceae


A.

Compositae (Asteraceae)

Capitulum or head inflorescence is the characteristic feature of Family- Compositae (Asteraceae).

In capitulum inflorescence, main axis is suppressed and flowers or florets are produced from thalamus. The peripheral florets are unisexual and known as ray florets while central florets are bisexual and known as disc florets.


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47.

Which of the following organs is not involved in the elicitation of immune response?

  • Brain

  • Lymph nodes

  • Spleen

  • Thymus


48.

Fever in malaria is due to :

  • entry of sporozoites into blood capillaries

  • entry of merozoites into liver cells

  • release of merozoites from red blood cells

  • entry of cryptomerozoites into red blood cells


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49.

The origin of kidney and ureter in Rana tigrina is :

  • all mesodermal

  • all endodermal

  • ectodermal and mesodermal

  • mesodermal and endodermal


50.

Which of the following is not a case of epimorphosis ?

  • Formation of sperms from small clumps of cells

  • Regeneration of tail in a lizard

  • Replacement of severed arm in starfish

  • Replacement of limb in salamander


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