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Exam-style practice

Biological molecules practice questions

Practise mixed syllabus-aligned questions for Biological molecules. Aligned to Cambridge IGCSE Combined Science.

Practice questions

Question 1 of 6

Choose an answer, get feedback, then move sideways through the set.

Paper 3 structured question: Biological molecules

Paper 3Theory (Core)2 marks

Description

Chemical Composition of Biomolecules

Carbohydrates, fats, and proteins are essential biomolecules made up of specific chemical elements. Carbohydrates primarily consist of carbon (C), hydrogen (H), and oxygen (O). Fats, also known as lipids, are composed of carbon (C), hydrogen (H), and oxygen (O), but in different ratios compared to carbohydrates. Proteins are made up of carbon (C), hydrogen (H), oxygen (O), and nitrogen (N), and sometimes sulfur (S).

  1. a

    Identify List the chemical elements that make up carbohydrates, fats, and proteins.

    Aim for approximately 2 distinct marking points.

    [2]