Cell : The Unit of Life

Which of the following is related to glycosylation of protein?

• Lysosome

• Mitochondrium

• Peroxisome

• Rough endoplasmic reticulum

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

Barr body is found in the cytoplasm during

• interphase in cell of female mammal

• interphase in cell of male mammal

• prophase in cell of female mammal

• prophase in cell of male mammal

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.

Maximum absorption of light occurs in the region of

• 400 - 700 nm

• 700 - 900 nm

• 1000 - 1200 nm

• 1500 - 2000 nm

Assertion : A cell membrane shows fluid behaviour.

Reason : A membrane is a mosaic or compositeof diverse lipids and proteins.

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

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

• If Assertion is true statement but Reason is false

• If both Assertion and Reason are false statements

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

• acentric

• submetacentric

• telocentric

• metacentric

Which of these are most widely used in genetic engineering?

• Plastid

• Plasmid

• Mitochondrion

• Ribosome

• Wallace

• Virchow

• Schleiden

• None of these

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.