NEET Biology Solved Question Paper 2006

Multiple Choice Questions

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0n high mountains, difficulty in breathing is due to

  • decrease in partial pressure of O2

  • decrease in amount of O2

  •  increase in CO2 concentration

  • all of the above

A.

decrease in partial pressure of O2

When the partial pressure of oxygen is higher in the atmosphere the haemoglobin readily binds with it (at approx 100mmHg. The pressure of oxygen lungs) and tries to release oxygen and attain relaxed conformation when pressure decreases below 40mmHg(The pressure oxygen in tissue).

At high mountain, the pressure of oxygen is low so a large volume of air is required by haemoglobin to attain a relaxed state.

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    • YAM

    • Anabaena

    • Azotobacter

    • Rhizobium

    Answer

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    • homologous organs

    • analogous organs

    • vestigial organs

    • all of the above

    Answer

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    • Cladophora

    • Volvox

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    Answer

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    • R. stolonifer

    • R. nodosus 

    • R. sexualis

    Answer
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    • 1

    • 4

    • 16

    • 32

    Answer

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    • enzymes

    • oxygen

    • nitrogen

    • water

    Answer

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    • nitrogenase

    • hydrogenase

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    • carboxylase

    Answer

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    • apoenzyme

    • prothetic group

    • none of these

    Answer
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    • algae

    • bacteria

    • roots of higher plants

    Answer