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Cell : The Unit of Life

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12
Give examples of  infoldings of cell membrane.

Cristae of mitochondria and mesosomes found in prokaryotes are some examples of the infoldings of the cell membrane.

Who concluded, “Cells are the ultimate units forming the structure of all plant tissues”?

Mathias Schleiden.

State one difference between gram positive and gram negative bacteria.

Gram positive bacteria retains the gram stain whereas the Gram negative bacteria does not.

What are receptor molecules ?

Receptor molecules are specific proteins in the cell's plasma membrane that receive chemical signals from outside the cell. When such chemical signals bind to a receptor, they cause some form of cellular response.

Who reported that the cell had an outer layer which is known as plasma membrane today?

Theodore Schwann

What is the function of contractile vacuole in amoeba?

Excretion.

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