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Question

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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Solution

(a) All cells have nuclei.
False. Cells such as red blood cells do not have nuclei.

(b) Chloroplasts are present in all plant cells.
False. Chloroplasts are present in the leaf cells of plants.

(c) True

(d) True

(e) Ribosomes are called 'suicide bags'.
False. Lysosomes are called suicide bags.

(f) The cell wall is made of cellulose, which is a living substance.
False. The cell wall is made of cellulose, which is a non-living substance.

(g) The cell membrane is freely permeable to all substances.
False. The cell membrane is semi-permeable.

(h) True

(i) Structures present in the cell are called organs.
False. Structures present in the cell are called organelles.

(j) True

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