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What's covered, in curriculum order. Titles and summaries are free to browse; the full section, with worked examples, unlocks with a free account.
1. Protein Structure and Function
The four levels of protein structure, how ligand binding and phosphorylation reversibly change a protein's shape, and what happens when a protein is denatured.
2. Membrane Proteins
The main categories of membrane protein and the distinct job each does, building on the fluid mosaic model.
4. Cell Signalling
How a ligand outside a cell triggers a specific, often greatly amplified, response inside it.
7. Control of the Cell Cycle
The checkpoints, cyclins, and tumour suppressor proteins that make sure a cell only divides when it is safe to do so.
8. Cell Death and Cancer Biology
The controlled process of apoptosis, and how faults in the genes controlling division and death can lead to cancer.
9. Laboratory Techniques for Biologists
The core techniques this course examines for handling solutions, separating and detecting proteins, and culturing cells safely.
10. Sources of Evolutionary Change
How genetic drift, founder effects and bottlenecks change allele frequencies independently of natural selection.
13. Population Genetics and the Hardy-Weinberg Principle
How allele frequencies are calculated across a whole population, and the equilibrium equation used to predict them.
19. Experimental Design and Sampling
How a well-designed biological experiment isolates the effect of one variable and produces a trustworthy result.
20. Descriptive Statistics and Error Bars
How standard deviation and standard error describe the spread of data, and what error bars on a graph actually show.
21. Correlation, Causation, and Presenting Data
What a correlation between two variables can and can't tell you, and how to choose an appropriate way to present biological data.
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