[5 Mark Question Answer]

Question 15 Marks

List the enzymes and their action on food in the stomach and intestine.

Answer

REGION	ENZYME	ACTION ON FOOD
Stomach	Pepsin	Acts on proteins and converts it into polypeptides
Small intestine
Duodenum	Amylopectin	Acts on starch and converts it into maltose
Duodenum	Trypsin	Acts on remaining proteins, proteoses and peptones to produce peptides and amino acids
Ileum	Erepsin	Acts on proteins and polypeptides and converts them into small peptides and amino acids
	Sucrose	Acts on sucrose and converts it into glucose and fructose
	Lactose	Acts on lactose and converts it into glucose and galactose

View full question & answer→

Question 25 Marks

What are the main characteristics of enzyme?

Answer

1.It is easily influenced, by environmental change.Environmental factors include temperature, pH, and inhibitor.
2.It acts as catalystThe enzyme functions in accelerating chemical reaction, but the enzyme itself does not change after the reaction ends.
3.It functions specifically.The enzyme only catalyzes one kind of substrate and cannot function for many substrates. The term is called one enzyme one substrate.
4.It functions in reverse. It means the enzyme does not determine the direction of reaction, but it only functions in accelerating reaction rate until it reaches equilibrium. The enzyme also functions in substance synthesis and substance breaking down reaction.
5.It is required, in small amount. A small amount of enzyme is able to catalyze a chemical reaction.

View full question & answer→

BIOLOGY [5 Mark Question Answer]

Test yourself on this topic