What are the characteristics of prokaryotic cells? from Biology

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 Multiple Choice QuestionsMatch 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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 Multiple Choice QuestionsLong 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 QuestionsMultiple 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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 Multiple Choice QuestionsShort Answer Type

164. What is a mesosome in prokaryotic cell? Mention the functions that it performs.
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 Multiple Choice QuestionsLong Answer Type

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165. What are the characteristics of prokaryotic cells?


Characteristics of Prokaryotic cell are as follows:

1. The nucleus is not bounded by a membrane.

2. Their genetic material is naked and present in the form of nucleoid in the cytoplasm.

3. They are generally smaller and divide more rapidly as compared to the eukaryotic cell.

4. They are usually surrounded by cell wall except for mycoplasma.

5. Besides genomic DNA many prokaryotic cell have small circular DNA called plasmids outside the genomic DNA.

6. Eukaryotic organelles or membrane bound organelles are not found in the prokaryotic cells. The ribosomes found in these are of 70S type. 

7. Mesosomes which are the invaginations of plasma membrane may be present.

8. They have special inclusion bodies. 

 

 

 

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 Multiple Choice QuestionsShort Answer Type

166. Multicellular organisms have division of labour. Explain.
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 Multiple Choice QuestionsLong 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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 Multiple Choice QuestionsShort Answer Type

168.  Cell is the basic unit of life. Discuss in brief.
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 Multiple Choice QuestionsLong Answer Type

169. What are nuclear pores ? State their function.
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 Multiple Choice QuestionsShort Answer Type

170. Both lysosomes and vacuoles are endomembrane structures, yet they differ in terms of their function. Comment
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