Advertise on podcast: Molecules to Ecosystems | An IB Bio Podcast

Topic B3.2, transport, takes a look at the different circulatory systems and transport processes in animals and plants.

This episode looks into topic B3.1, gas exchange to understand the adaptations of gas exchange surfaces and the different processes surrounding gas exchange in animals and plants.

This episode takes a quick look at topic D2.3, water potential. We look into osmosis and its effects on cells as well as water potential and how it impacts the movement of water across a selectively permeable membrane. 

Topic D2.2, gene expression, is an only HL topic that looks into epigenetics and gene expression as a whole. We take a look at different mechanism and examples to understand the relevance of gene expression and the impact of environmental factors on it. 

This episode looks at topic D2.1, cell and nuclear division. We discuss the differences between mitosis and meiosis as well as the phases of the two different cell division types and their importance. 

Topic C2.2, neural signalling, looks at the structure and function of neurons and at the process of neural signalling. We take a look at different examples, such as acetylcholine and cocaine, to understand how membrane potentials change to transmit nerve impulses. 

In this episode we take a look at topic C2.1 which is chemical signalling. This is only in the HL syllabus and looks at ligands as signalling molecules and receptors are proteins that they bind to. We take a look at different example of ligands and receptors that initiate a variety of different signalling pathways. 

This episode looks into topic B2.3, cell specialisation. We take a look at the stem cells and their potency and then at the many adaptations of different cells to perform their specific functions. 

Topic B2.2, organelles and compartmentalisation is largely an HL topic that takes a look at the role of compartmentalisation and separation in eukaryotic cells. We take a look at the structures of mitochondria and chloroplasts as well as the nucleus, the Golgi apparatus and vesicles. 

In this episode we dive into topic B2.1, membranes and membrane transport to understand the selective permeability of cell membranes and how molecules are transported into and out of cells. 

This episode looks into topic A2.3, viruses, which is an HL topic. We discuss the features and structures in viruses and take a look at the different approaches of infections. I also discuss a couple of examples in the syllabus guide to understand virus diversity and evolution. 

In this episode we take a look at topic A2.2, cell structure. We discuss the structures and organelles in prokaryotic and eukaryotic cells as well as the microscopy techniques and the endosymbiosis theory. 

In this episode we dive into topic A2.1, origins of cells. This is an HL topic that looks into the conditions of prebiotic Earth that led to the formation of organic carbon compounds and eventually gave life to the first true cells. We look into the existence of LUCA and evidence for the evolution of cells to understand how cells formed and evolved.

This episode looks into topic D1.3, mutation and gene editing. We take a look at causes and consequences of genetic mutation and discuss the impact that mutations may have on organisms and evolution. The HL content also takes a look at gene editing techniques including gene knockout and CRISPR-Cas9. 

In this episode we look into topic D1.2, protein synthesis. We look into transcription and translation as essential processes in cells and key steps in the synthesis of polypeptides.