CAIE IGCSE Biology 4.1.1 Elements in Biological Molecules

Practise listing carbon, hydrogen and oxygen in carbohydrates and fats, then use the additional presence of nitrogen to distinguish proteins in tables and questions.

Exam points

state that carbohydrates and fats contain the elements carbon, hydrogen and oxygen
state that every protein contains carbon, hydrogen, oxygen and nitrogen
use nitrogen as the distinguishing element when comparing proteins with carbohydrates or fats

[Maximum number: 1]

Antibodies are proteins.

State the chemical elements present in all proteins that are also found in carbohydrates and fats.

All question bank results loaded

4.1.1—Chemical elements that make up question 1