Introduction to the IAL Specification

The Pearson Edexcel International Advanced Level (IAL) in Biology is designed to provide students with a comprehensive understanding of biological concepts, practical skills, and scientific methods. The IAL qualification is modular, allowing students to complete units at their own pace. Unit 1, titled “Molecules, Diet, Transport, and Health,” covers fundamental topics essential for understanding higher-level biology.

Quick Overview of Unit 1 for Edexcel Biology 🧬

Welcome to our quick overview of Unit 1 for Edexcel Biology! We’re dividing this unit into three main blocks. I’ll show you the main topics and provide a timeline so you can finish this unit in under two months. ⏳

1️⃣. Biological Molecules 💧🍞🍔🍗

Topics Covered:

• Water: Understand the importance of water as a solvent in biological systems.
• Carbohydrates (Sugars): Learn about monosaccharides, disaccharides, and polysaccharides, and their roles in energy storage and provision.
• Lipids: Study the structure and function of triglycerides, phospholipids, and cholesterol.
• Proteins (including Enzymes): Explore the structure of amino acids, protein synthesis, enzyme activity, and factors affecting enzyme action.

Core Practicals:

• Use Benedict’s reagent for estimating reducing sugars.
• Investigate the effect of temperature, pH, enzyme concentration, and substrate concentration on enzyme activity.

2️⃣. Genetics 🧬🧪

Topics Covered:

• Nucleic Acids (DNA & RNA): Understand the structure and function of DNA and RNA, including replication and transcription.
• Protein Synthesis: Learn about the processes of transcription and translation, and the roles of mRNA, tRNA, and ribosomes.
• Inheritance: Study patterns of inheritance, including monohybrid and dihybrid crosses, and understand the concepts of genotype and phenotype.

Core Practicals:

• Investigate membrane properties, including the effect of alcohol and temperature on membrane permeability.
• Use a light microscope to observe and draw cells.

3️⃣. Circulation ❤️🩸

Topics Covered:

• Structure of the Heart: Learn about the anatomy of the heart and the cardiac cycle.
• Blood (Hemoglobin & Blood Clotting): Understand the role of hemoglobin in oxygen transport and the process of blood clotting.
• Cardiovascular Disease (Heart Disease & Treatment): Study the causes, risk factors, and treatments for cardiovascular diseases.

Core Practicals:

• Investigate the structure of a mammalian heart by dissection.
• Analyse and interpret data on cardiovascular health risks.

Timeline for Completing Unit 1

Each topic takes about one lesson. If you manage to do two lessons per week, you can finish the entire unit in under two months! 📅💪 Here’s a suggested timeline:

Week 1:

• Lesson 1: Water
• Lesson 2: Carbohydrates

Week 2:

• Lesson 3: Lipids & Proteins
• Lesson 4: Enzymes

Week 3:

• Lesson 5: Nucleic Acids (DNA & RNA)
• Lesson 6: Protein Synthesis

Week 4:

• Lesson 7: Inheritance
• Lesson 8: Structure of the Heart

Week 5:

• Lesson 9: Blood (Haemoglobin & Blood Clotting)
• Lesson 10: Cardiovascular Disease

Following this you should solve full past papers from 2019 until 2025, Good luck!