Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Passage cells are thin-walled cells found in

  • endodermis of roots facilitating rapid transport of water from cortex to pericycle

  • phloem elements that serve as entry points for substance for transport to other plant parts

  • testa of seeds to enable emergence of growing embryonic axis during seed germination

  • testa of seeds to enable emergence of growing embryonic axis during seed germination

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2.

Opening of floral buds into flowers, is a type of

  • autonomic movement of locomotion

  • autonomic movement of variation

  • paratonic movement of growth

  • paratonic movement of growth

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3.

In the leaves of C4 plants, malic acid formation during CO2 fixation occurs in the cells of

  • mesophyll

  • bundle sheath

  • phloem

  • phloem

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4.

In human body, which one of the following is anatomically correct?

  • Floating ribs - 2 pairs

  • Collar bones - 3 pairs

  • Salivary glands - 1 pair

  • Salivary glands - 1 pair

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5.

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing micro-organism

  • casuarina equisetifolia

  • crotalaria juncea

  • cycas revoluta

  • cycas revoluta

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6.

In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are

  • n = 7  and x = 21

  • n = 21 and x = 21

  • n = 21  and x = 14

  • n = 21  and x = 14


D.

n = 21  and x = 14

The basic (x) number of chromosome of hexaploid wheat is 7  and haploid (n) number is 21.

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7.

Flagellated male gametes are present in all the three of which one of the following sets?

  • Anthoceros, Funaria and Spirogyra

  • Zygnema, Saprolegnia and Hydrilla

  • Fucus, Marsilea and Calotropis

  • Fucus, Marsilea and Calotropis

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8.

Increased asthmatics attacks in certain seasons are related to

  • hot and humid environment

  • eating fruits preserved in tin containers

  • inhalation of seasonal pollen

  • inhalation of seasonal pollen

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9.

Which of the following is a slime mould?

  • Rhizopus

  • Physarum

  • Thiobacillus

  • Thiobacillus

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10.

Which of the following is an example of negative feedback loop in humans?

  • constriction of skin blood vessels and contraction of skeletal muscles when it is too cold

  • secretion of tears after falling of sand particles into the eye

  • salivation of mouth at the sight of delicious food

  • salivation of mouth at the sight of delicious food

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