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Byju's Answer
Standard XII
Biology
Cell Membrane
Select the wr...
Question

Select the wrong statement with respect to the structure of a plant cell

A
Cellulosic cell wall is present inside the cell membrane
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B
Centrioles are usually absent
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C
A large central vacuole is present
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D
Golgi apparatus is formed of a number of unconnected units called dictyosomes
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Solution

The correct option is A Cellulosic cell wall is present inside the cell membrane
Cell wall is the outer rigid protective and supportive covering of plant cells, fungi and some protists. Cell membrane is covering of protoplasm which occurs inside the cell wall. In plants the cell wall is made of cellulose.
So, the correct answer is 'Cellulosic cell wall is present inside the cell membrane'

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Q. Consider the following statements and state true(T) or false(F).
a) Dictyosomes are simpler units of golgi apparatus in animal cells.
b) Teichoic acid is absent in cell wall of gram negative bacteria.
c) Viruses are an exception to cell theory.
Q. Pick the correct statements about animal and plant cells: Animal cellPlant cell(i) Cell wall is presentCell wall is absent(ii) Plastids are absentPlastids are present(iii) Presence of single large vacuolePresence of many, small vacuoles(iv) Lysosomes are always presentLysosomes are rare
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. (a) Define dictyosome. Point out the difference between Golgi appartus of plant and animal cells.
(b) Why is Golgi appartus called Golgi apparatus.
(c) Name an organism and cell where Golgi apparatus is absent.
Q. Assertion :In a mature plant cell, the nucleus and cell organelles are pushed against the cell wall. Reason: The plant cell have single and large central vacuole which occupies 50-90% of the cell volume.
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