Multiple Choice Questions

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Assertion: Rhabdome is present in Palaemon.

Reason: Rhabdome has an important role in digestion

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


C.

If assertion is true but reason is false

Inner ends of cone cells lie upon an elongated, spindle shaped rod, the rhabdome. Rhabdome is secreted and surrounded by a group of seven elongated retinal cells. Rhabdome , and retinal cells together form the receptor region of eye.


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Assertion: Light is one of the important factor in transpiration.

Reason: It induces stomatal opening and closing. Therefore, transpiration increases in light and
decreases in dark.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


Two opposite forces operate in the growth and development of every population. One of them is related to the ability to reproduce at a given rate. The force opposite to it is called

  • fecundity

  • environmental resistances

  • biotic control

  • mortality.


Assertion: Fi particles are present in the inner mitochondrial membrane.

Reason: An electron gradient formed on the inner mitochondrial membrane, forms ATP.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


Assertion: The higher concentration of O2 in the atmosphere is inhibitory to photosynthesis.

Reason: CO2 is the main substrate of photosynthesis.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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Assertion: Ciliated epithelium is present in the inner lining of trachea and large bronchi.

Reason: Ciliary movement propel the mucus and foreign particle towards the larynx.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


Assertion: Cephalization is advantageous to an animal.

Reason: It improves the appearance of the animal

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


Assertion: Rabies is acute infectious disease of warm blooded mammals characterised by
involvement of central nervous system resulting in paralysis and finally death.

Reason: This is caused due to neurotropic filterable bacteria in saliva of rabid animals.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


Assertion: Competitive inhibitor is also called as substrate analogue.

Reason: It resembles the enzymes in structure.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.


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Assertion: Pituitary is attached to hypothalamus by a vein.

Reason: This attachment hypophysial portal vein.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false

  • If both assertion and reason are false.