11. (a) Compare and contrast between bacteria and virus [4 marks]
(b) A chef realized that the bread he mixes with flour and sugar cannot rise up. Explain how you can raise the dough.
Your answer should include the following;
- Identify problems
- Classification of problem
- Solving method
- Steps of method use
- Evaluation [6 marks]
- (a) (I) Comparison between bacteria and virus: Both of them are
microorganism //size less than 10 micro meter.
Differentiate between bacteria and virus
|Can be seen inder light microscope||Only can be seen under electron microscope.|
|Not all bacteria is parasite / some don’t need host.||All virus are parasite /only can growth in life cell which as a host.|
|Not all bacteria pathogenic/ Some bacteria are usefull to human.||All virus are pathogenic.|
Total ; 4 marks
Total : 6 mark(b)
|1||Identify problems||The bread he mixes with flour and sugar cannot rise up.|
|2||Classification of problem||how he can raise the dough.|
|3||Solving method||To raise the bread, he has to put in yeast into the ingredient.|
|4||Steps of method use||1. When yeast is mix with flour and sugar, yeast will compose sugar to produce carbon dioxide.
2. The gas will push the dough from inner when
the dough is heated.
3. This action will raise the dough of bread.
|5||Evaluation||By filling yeast will form carbon dioxide from the reaction with sugar and when the dough is heated, the gas will expand to raise the bread.|