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Cells

Which of the ...

Question

Which of the following statements is not a part of the cell theory?

A

All living beings are made up of one or more cells.

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B

Cells are the basic structural and functional units of life.

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C

All cells arise by division of pre-existing cells.

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D

All cells are surrounded by cell wall.

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Solution

The correct option is D All cells are surrounded by cell wall.
Schleiden, Schwann and Virchow contributed to the formation of cell theory. It states that:

All living beings are made up of one or more cells.

Cells are the basic structural and functional units of life.

All cells are similar in their chemical composition and metabolic processes.

All cells arise by division of pre existing cells.

All cells do not possess cell wall. For example, animal cells are not surrounded by cell wall.

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Similar questions

Q. Statement 1: All cells arise from pre-existing cells.
Statement 2: All cells have a cell wall.

Q. Mark the following statements 'true' or false. Rewrite the wrong ones correctly.
(a) All cells have nuclei.
(b) Chloroplasts are present in all plant cells.
(c) Animal cells usually do not have vacuoles.
(d) Animal and plant cells have cell membranes.
(e) Ribosomes are called 'suicide bags'.
(f) The cell wall is made of cellulose which is a living substance.
(g) The cell membrane is freely permeable to all substances.
(h) All living organisms are made up of cells.
(i) Structures present in the cell are called organs.
(j) Cell respiration takes place in mitochondria.

Q. Who first propounded the cell theory stating that all living things are made up of cells or of material formed by cells?

Q. Which of the following statement are false?
(a) Most cells are tiny with volume range of

1 - 100

n m^{3}

(b) Some cells have microvelli to increase the absorptive surface area.
(c) All cells arise from pre-existing cells.
(d) In plants, translocation of solutes is performed by xylem vessels and tracheids.
(e) According to cell theory, all cells arise from abiotic material.

Q. The statement “Omnis cellula e cellula”, which means all cells arise from pre-existing cells was given by :

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