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Course: Igcse Biology
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Curriculum

Igcse Biology

1. Characteristics and Classification of Living Organisms

0/17 Dr Dabour Hub Science Diagram and Course Material

2. Organisation of the Organism

0/15 Dr Dabour Hub Science Diagram and Course Material

3. Movement into and out of Cells

0/12 Dr Dabour Hub Science Diagram and Course Material

4. Biological Molecules

0/10 Dr Dabour Hub Science Diagram and Course Material

5. Enzymes

0/11 Dr Dabour Hub Science Diagram and Course Material

6. Plant Nutrition

0/14 Dr Dabour Hub Science Diagram and Course Material

7. Human Nutrition

0/27 Dr Dabour Hub Science Diagram and Course Material

8. Transport in Plants

0/21 Dr Dabour Hub Science Diagram and Course Material

9. Transport in Animals

0/17 Dr Dabour Hub Science Diagram and Course Material

10. Diseases and Immunity

0/12 Dr Dabour Hub Science Diagram and Course Material

11. Gas Exchange in Humans

0/9 Dr Dabour Hub Science Diagram and Course Material

12. Respiration

0/13 Dr Dabour Hub Science Diagram and Course Material

13. Excretion in Humans

0/13 Dr Dabour Hub Science Diagram and Course Material

14. Coordination and Response

0/32 Dr Dabour Hub Science Diagram and Course Material

15. Drugs

0/9 Dr Dabour Hub Science Diagram and Course Material

16. Reproduction

0/31 Dr Dabour Hub Science Diagram and Course Material

17. Inheritance

0/31 Dr Dabour Hub Science Diagram and Course Material

18. Variation and Selection

0/14 Dr Dabour Hub Science Diagram and Course Material

19. Organisms and their Environment

0/24 Dr Dabour Hub Science Diagram and Course Material

20. Human Influences on Ecosystems

0/21 Dr Dabour Hub Science Diagram and Course Material

21. Biotechnology and Genetic Modification

0/12 Dr Dabour Hub Science Diagram and Course Material
Quiz

Enzymes – Check yourself

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Enzymes IGCSE Biology check yourself quiz: free practice for IGCSE Biology. Work through this Enzymes IGCSE Biology check yourself quiz and get instant feedback on every answer. If you get stuck, review the 5.1 Enzymes — Notes lesson. More practice: IGCSE Biology — all units. Syllabus: Cambridge IGCSE Biology 0610 syllabus.

  • Questions count: 10
  • Passing grade: B+
  • Time limit: 10 minutes
Start Quiz
1.
What are enzymes made of?
Carbohydrates
Lipids
Proteins
Nucleic acids
2.
Why can amylase not digest protein?
Protein is too large
The active site is not complementary to protein
Amylase is denatured by protein
Protein has the wrong pH
3.
What happens to an enzyme above its optimum temperature?
It works faster forever
It becomes denatured
It changes substrate
It becomes a carbohydrate
4.
Pepsin works best in the stomach because:
Its optimum pH is about 2
Its optimum temperature is 60 °C
It digests starch
Its optimum pH is about 9
5.
In the starch-amylase test, what shows the starch has all been digested?
Iodine turns blue-black
Iodine stays orange-brown
Solution turns brick red
Solution turns purple
6.
If the reaction took 50 s, what is the rate?
50 s−1
0.5 s−1
0.2 s−1
0.02 s−1
7.
Which statement best describes Enzyme?
The temporary structure formed when a substrate binds to the active site.
A substance that increases the rate of a chemical reaction and is not changed by the reaction.
The ability of an enzyme to act only on one substrate because of the shape of its active site.
A protein that functions as a biological catalyst.
8.
Which statement best describes Denaturation?
A meeting of enzyme and substrate molecules, needed for a reaction; more frequent at higher kinetic energy.
The ability of an enzyme to act only on one substrate because of the shape of its active site.
The temporary structure formed when a substrate binds to the active site.
A permanent change in the shape of an enzyme's active site, so the substrate no longer fits.
9.
Which statement best describes Substrate?
A protein that functions as a biological catalyst.
The region of an enzyme with a specific shape where the substrate binds.
A substance that increases the rate of a chemical reaction and is not changed by the reaction.
The molecule an enzyme acts upon.
10.
Which statement best describes Active site?
The temporary structure formed when a substrate binds to the active site.
A meeting of enzyme and substrate molecules, needed for a reaction; more frequent at higher kinetic energy.
The region of an enzyme with a specific shape where the substrate binds.
A substance that increases the rate of a chemical reaction and is not changed by the reaction.
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Part of 5. Enzymes — see every lesson and quiz in this unit.
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