Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

11.

Which of the following statements is correct

  • Photorespiration is useful process.

  • C4 plants are more efficient than C3 plants.

  • C3 plants are more efficient than C4 plants.

  • Photorespiration is absent in C3 plants but present in C4 plants.


12.

Which of the following statements is incorrect regarding fermentation

  • Propionibacterium is used to ferment the cheese.

  • The puffed-up appearance of dough is due to the production of CO2 gas.

  • Fermentation in muscle produces ethanol.

  • Toddy is made by fermenting sap from palms.


13.

Which of the following statements is correct

  • Aspergillus niger is used for producing cyclosporin A.

  • Activated sludge is digested by aerobic bacteria to produce marsh gas.

  • Fleming, Chain & Florey were awarded with Nobel Prize for discovering penicillin. 

  • BOD is amount of oxygen produced by bacteria on decomposition.


14.

Which of the following elements is present in very less quantity in the body

  • K

  • Ca

  • Mg

  • Cu


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15.

Which of the following is not a characteristic of meiosis

  • It involves two stages of DNA replication one before meiosis-I and another before meiosis-II

  • It involves recombination and crossing over

  • Sister chromatids separate during anaphase II

  • Nuclear membrane disappears during prophase.


A.

It involves two stages of DNA replication one before meiosis-I and another before meiosis-II

Chromosome replication occurs once but meiosis has two M-phases each with its own karyokinesis and cytokinesis. As a result chromosome number is halved. The transition period between M-phase I (meiosis I) and M-phase II (meiosis II) is short and without DNA replication. It is called interkinesis.


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16.

Which statement is correct regarding mosses

  • They have dominant and independent sporophyte.

  • Their antherozoids require water for fertilization.

  • Their archegonia produce many eggs.

  • Their antherozoids are multiflagellated


17.

Kingdom Animalia is characterised by

  • direct dependence on autotrophs

  • indirect dependence on autotrophs

  • absence of chlorophyll

  • absence of cell wall.


18.

Assertion: Enzymes lower down the activation energy of the reactant molecule to make its transition into product easier.

Reason: Enzymes are highly substrate specific catalysts.

  • 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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19.

Assertion: Water that enters into a plant cell through diffusion makes it turgid.

Reason: Entry of water into the cell through diffusion develops wall pressure inside the cell.

  • 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.


20.

Assertion: Movement of materials inside phloem is bidirectional i.e. it can be both upwards or downwards.

Reason: Movement of molecules inside xylem is unidirectional i.e. always upwards.

  • 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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