Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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41.

Assertion : Salamander, Sphenodon are classified as amphibians.

Reason : Sphenodon is regarded as living fossil.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true


D.

If Assertion is false but Reason is true

Salamander is a tailed carnivorous and nocturnal amphibian. Sphenodon is a burrowing, carnivorous and nocturnal reptile. It is regarded as a living fossil.


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42.

Assertion : Rheumatoid arthritis is an inflammation of the synovial membrane in synovial joints.

Reason : Infectious arthritis mostly occurs due to bacterial and viral infection.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true


43.

Assertion : Monocot stem bears collateral open vascular bundles.

Reason : If cambium is absent such vascular bundles are called closed type.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true.


44.

Assertion : Plasma membrane is exceedingly thin and not visible as a separate layer. 

Reason : It appears merely as a surface layer of cytoplasm.

  • If both Assertion and Reason are true and Reason is the correct explantion of Assertion

  • If both Assertion and Reason are true and Reason is not the correct explanation of Assertion

  • If Assertion is true but Reason is false

  • If Assertion is false but Reason is true


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45.

Cocaine is a stimulant, which may cause addiction. It is an alkaloid obtained from

  • Eucalyptus

  • Erythroxylon

  • Rauwolfia

  • Papaver


46.

Some students, during a study, caught, marked and released 80 fishes in a pond. Later 100 fishes were caught at random. Among these 40 were found to be marked. What is the approximate number of fishes in the pond?

  • 50

  • 100

  • 200

  • 4000


47.

The ratio in a dihybrid test cross between two individuals is given by

  • 2 : 1

  • 1 : 2 : 1

  • 3 : 1

  • 1 : 1 : 1 :1


48.

Which of the following is an egg laying mammal ?

  • Kangaroo

  • Platypus

  • Penguin

  • Whale


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49.

In RNA thymine is replaced by

  • uracil

  • adenine

  • thiamine

  • guanine


50.

Genetic drift operates only in

  • island population

  • smaller population

  • larger population

  • none of these


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