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Cell : The Unit of Life

Multiple Choice Questions

311.

In which method of transport, in plasma membrane does not require carrier molecule?

Active transport
Facilitated diffusion
Simple diffusion
Na⁺ - K⁺ pump

312.

Which structure is present in both prokaryotic and eukaryotic plant cells?

Cell wall
Nucleus
Chloroplast
Mitochondria

Short Answer Type

313.

What is telomere? State its function.

314.

What is riophorins?

Multiple Choice Questions

315.

What is mitoplast?

Membraneless mitochondria
Another name of mitochondria
Mitochondria without outer membrane
Mitochondria without inner membrane

316.

Thylakoids occur inside

mitochondria
chloroplast
Golgi apparatus
endoplasmic reticulum

317.

Mitochondria are semiautonomous as they possess

DNA
DNA and RNA
DNA, RNA and ribosomes
Protein

318.

Which of the cell organelle lacks membrane?

Mesosome
Mitochondria
Ribosome
Liposome

319.

Chromosome is made up of

DNA and pectin
RNA and DNA
DNA and histone
only histone

320.
Cell theory is not applicable for

bacteria

fungus

algae

virus

virus

Cell theory was given by Theodor Schwann, Mathias Schleiden and Rudoplh Virchow. The cell theory states :
(i) All living organisms are composed of cells. They may be unicellular or multicellular.
(ii) The cell is the basic unit of life.
(iii) Cells arise from pre-existing cells.
The modem version of the cell theory includes the ideas:

1. Energy flow occurs within the cells.
2. Hereditary information (DNA) is passed on from cell to cell.
3. All cells have the same basic chemical composition.