IGCSE Biology Paper-4: Specimen Questions with Answers 112 - 114 of 279
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Question 112
Write in Brief
One Liner▾Figure shows a mushroom . Label the part X and Y.
Explanation
Part X is Cap and part Y is Gills.
Question 113
Explanation
Enzymes play very important role in metabolism in our body, but they can also use to catalyze industrial reactions outside the body, which are called as immobilized enzymes. Advantages and disadvantage of immobilized enzymes are-
Advantages | Disadvantages |
Such enzymes catalyze specific reactions and work at much lower temperatures. | Immobilization requires extra time |
The enzymes can be reused catalyzing the same reaction many times. | There may be a reduction in reaction rates if enzymes cannot mix freely with the substrate |
There will be no enzyme left in the product at the end | Immobilized enzymes cannot be used if one of the substrates is insoluble. |
Purification is not necessary |
Question 114
Explanation
Sexually transmitted diseases are also called sexually transmitted infections (STI) which are self – invented disease as they occur in persons having unprotected sex with unknown or multiple partners