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Biology : Cell : The Unit of Life

Match The Following

161. Match the following

A. Cristae	(i) Flat membranous sacs in stroma
B. Cisternae	(ii) Infoldings in mitochondria
C. Thylakoids	(iii) Disc-shaped sacs in Golgi apparatus.

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Long Answer Type

162. Name two cell-organelles that are double membrane bound. What are the characteristics of these two organelles ? State their function and draw labelled diagrams of both.

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Multiple Choice Questions

163. Which of the following is correct :

Cells of all living organisms have a nucleus.
Both animal and plant cells have a well defined cell wall.
In prokaryotes there are no membrane bound organelles.
Cells are formed by de novo from abiotic materials.

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Short Answer Type

164. What is a mesosome in prokaryotic cell? Mention the functions that it performs.

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Long Answer Type

165. What are the characteristics of prokaryotic cells?

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Short Answer Type

166. Multicellular organisms have division of labour. Explain.

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Long Answer Type

167. What is a centromere ? How does the position of centromere form the basis of classification of chromosomes. Support your answer with a diagram showing the position of centromere on different types of chromosomes.

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