CAIE IGCSE Biology 4.1 Biological Molecules
Practise identifying the composition, subunits and test results of key biological molecules and reading simple DNA diagrams.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- distinguish carbohydrate, fat and protein composition from the elements or subunits supplied
- infer which nutrients are present from Benedict's, iodine, Biuret or ethanol-emulsion results
- complete DNA bases or percentage calculations using complementary pairing across two strands
Covered syllabus points
4.1 Biological molecules question 1
[Maximum number: 1]
Antibodies are proteins.
State the chemical elements present in all proteins that are also found in carbohydrates and fats.
carbon, hydrogen, oxygen ;
4.1 Biological molecules question 2
[Maximum number: 1]
Two functions of the alimentary canal are mechanical digestion and chemical digestion.
Substances that are absorbed from the alimentary canal may enter cells and become part of the cells.
State the storage carbohydrate made from glucose in liver cells.
glycogen ;
4.1 Biological molecules question 3
[Maximum number: 1]
What is the test for protein?
name of the test
heat
colour change
Benedict's
yes
blue to purple
biuret
yes
blue to red
biuret
no
blue to purple
Benedict's
no
blue to red
C
All question bank results loaded