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.

Figure Shows a Structure of Mushroom – Label X and Y

Explanation

Part X is Cap and part Y is Gills.

Question 113

Edit

Describe in Detail

Essay▾

Write advantages and disadvantage of immobilized enzymes.

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-

Above Table Shows Advantages and Disadvantages of Immobilized Enzymes
AdvantagesDisadvantages
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 endImmobilized enzymes cannot be used if one of the substrates is insoluble.
Purification is not necessary

Question 114

Edit

Describe in Detail

Essay▾

STD is a self-invented disease Explain it.

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

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