Multiple Choice Questions

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If centromere is the middle, the chromosome is called :

  • sub-metacentric

  • metacentric

  • acentric

  • telocentric


B.

metacentric

In metacentric chromosomes centromere is present in the middle of chromosome.

In sub-metacentric chromosomes the centromere is submedian.

In Acrocentric chromosome centromere is sub terminal.

In Telocentric chromosome centromere is terminal.


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Assertion: Specialization ofcells is advantageous for the organism.

Reason : It increases the operational efficiency of an organism.

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

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

  • If assertion is true but reason is false.

  • If both the assertion and reason are false.


A chromosome carrying the centromere at one of the ends is called

  • acentric

  • submetacentric

  • telocentric

  • metacentric


Cell membrane is made up of:

  • protein

  • cellulose

  • lipids

  • lipids, carbohydrates and protein


Plant cell is differ from animal cell because of

  • the presence of cell wall and absence of chlorophyll in plant cell

  • the presence of cell wall and chlorophyll in plant cell

  • the absence of cell wall and presence of chloroplast in animal cell

  • the absence of cell wall and presence of chlorophyll in plant cell


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The wall of bacteria is consists of :

  • N-acetyl glucosamine

  • N-acetyl muramic acid

  • both (a) and (b)

  • cellulose


The 'power house' of cell is :

  • nucleus

  • golgi body

  • mitochondria

  • chloroplast


Assertion : The number of cells in a multicellular organism is inversely proportional to the size of body.

Reason : All the cells in the biological world are of same size.

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

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

  • If assertion is true but reason is false.

  • If both the assertion and reason are false.


Which of the following is related to glycosylation of protein?

  • Lysosome

  • Mitochondrium

  • Peroxisome

  • Rough endoplasmic reticulum


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DNA remains absent in :

  • chloroplast

  • nucleus

  • peroxysomes

  • chromosome


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