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Cell Wall

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Question

Read the following statements (A - E) and consider the question following them:
A. Extrinsic proteins are loosely held in the membrane
B. Cell wall of fungi is made up of chitin
C. Polyribosomes are several ribosomes attached to edroplasmic reticulum
D. Mycoplasma is cell wall less eukaryotic cell.
E. In plant cells, size of vacuole is larger than that of mitochondria.
How many of the above statements are correct?

A

1

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B

2

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C

3

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D

4

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Solution

The correct option is A 1
Cell wall of plants and fungi are made of cellulose and chitin respectively.
From A-E only this statement is correct
So, the correct option is '1'.

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Similar questions

Read the passage and answer the following question.

Ribosomes are the smallest cell organelles which can be seen only through an electron microscope. They are found in both prokaryotic as well as eukaryotic cells. Ribosomes are dense, round bodies which occur freely in the cytoplasm and may remain attached to the surface of the endoplasmic reticulum. Chemically, ribosomes are made up of ribonucleoprotein (in eukaryotic cells, the constituent of the ribosome is 40% protein and 60% ribosomal RNA). Ribosomes help in the process of protein synthesis. They are, therefore, called as the protein factories of the cell.

Ribosome is made up of

Consider the following statements.

(A) Plant cells have centrioles which are absent in almost all animal cells.

(B) Ribosomes are the site of protein synthesis.

(C) The middle lamella is a layer mainly of calcium carbonate which holds the different neighbouring cells together.

(D) In an animal cell, steroidal hormones are synthesized by smooth endoplasmic reticulum.

Of the above statements

Q. Consider the following statements
(a) Lysosomes keep the cells clean by digesting foreign materials.
(b) Ribosomes are present in eukaryotic cells only.
(c) The ER (endoplasmic reticulum) functions both as passageway for intracellular transport and as a manufacturing surface.
Which of the above statements are correct?

Q. How many of the cell organelles have no membrane in a eukaryotic plant cell? Ribosome, Chloroplast, Mitochondria, Endoplasmic Reticulum, Golgi bodies.

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.

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