MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Earn 100

Explain the meaning of this term: Denatured

Important Questions on Enzymes

MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 1
Explain the meaning of Substrate.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 1
Explain the meaning of Product.
MEDIUM
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 1
Explain the meaning of active sites.
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 2
A protease enzyme is found in the stomachs of humans. It catalyzes the breakdown of long chains of amino acids (proteins) into individual amino acid molecules. Suggest the optimum temperature for the activity of these protease enzymes.
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 2
A protease enzyme is found in the stomachs of humans. The stomach contains Hydrochloric acids. Suggest the optimum PH For the activity of this protease enzyme.
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 2
Explain why the rate of enzyme-controlled reaction is relatively slow at low temperatures.
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 2
Explain why the rate of reaction slows down above the enzyme’s optimum temperature?
HARD
Upper Secondary: IGCSE
IMPORTANT
Cambridge IGCSE® Biology Coursebook Third Edition>Chapter 5 - Enzymes>End-of-chapter questions>Q 3

Students investigated a sample of amylase from 100 Goats. 100 Small filter paper discs were each soaked in a different sample of goat amylase. The students tested the activity of these amylase samples using plain paper. The plain paper contains starch. A circle of plain paper was placed into a petri dish as shown in the diagram below. Iodine solution was used to stain the starch on plain paper.
When iodine solution reacts with the starch in the plain paper, what color would you see?

Question Image