Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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31.

Which hormone causes dilation of blood vessels, increased oxygen consumption and glycogenolysis?

  • ACTH

  • Insulin

  • Adrenalin

  • Adrenalin


C.

Adrenalin

Adrenaline (epinephrine) is a hormone produced by adrenal medulla and is secreted in great amounts during emotional states. It elevates the glucose level in blood stream (by glucogenesis) which is accompanied by an increase in oxygen consumption, body temperature, heat production. Adrenaline also causes an increase in the flow of blood by dilating the blood vessels.
Insulin regulates the glucose level in blood.
ACTH (Adreno Corticotropic Hormone) is secreted by the anterior pituitary and stimulates the adrenal cortex.
Glucagon is a polypeptide hormone secreted by the alpha cells of islets of langerhans of pancreas. It acts to promote glycogenolysis.

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32.

The causative agent of mad-cow disease is a

  • bacterium

  • prion

  • worm

  • worm

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33.

The translocation of organic solutes in sieve tube members is supported by

  • root pressure and transpiration pull

  • P-proteins

  • mass flow involving a carrier and ATP

  • mass flow involving a carrier and ATP

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34.

Biradial symmetry and lack of cnidoblasts are the characteristics of

  • Starfish and sea anemone

  • Ctenoplana and Beroe

  • Aurelia and Paramecium

  • Aurelia and Paramecium

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35.

The majority of carbon dioxide produced by our body cells is transported to the lungs

  • dissolved in the blood

  • as bircarbonates

  • as carbonates

  • as carbonates

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36.

In which one of the following sets of animals do all the four give birth to young ones?

  • Lion, bat, whale, ostrich

  • Platypus, penguin, bat, hippopotamus

  • Shrew, bat, cat, kiwi

  • Shrew, bat, cat, kiwi

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37.

Two commons characters found in centipede, cockroach and crab are

  • compound eyes and anal cerci

  • jointed legs and chitinous exoskeleton

  • green gland and tracheae

  • green gland and tracheae

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38.

Angiotensinogen is a protein produced and secreted by

  • macula densa cells

  • endothelial cells (cells lining the blood vessels)

  • liver cells

  • liver cells

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39.

Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?

  • Moist bread

  • Agar agar

  • Ripe banana

  • Ripe banana

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40.

Which one of the following is not included under in situ conservation?

  • Sanctuary

  • Botanical garden

  • Bisophere reserve

  • Bisophere reserve

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