Activities
C1.2 Krebs cycle hexagons _ model answers
These are suggested model answers for the activity, Krebs cycle SOLO hexagons on the page Glycolysis Link reaction & Krebs Cycle HL (2025) As model answers they don't cover all the possible options...
eBook
D2.2 Epigenetics - reading task
You would expect a Liger, with a lion father and a tigress mother to have about the same genetic makeup as a tigon who has a tiger father and a lioness mother. Why do both male and female ligers grow...
Activities
Case studies in epigenetics
This is a short activity to inform students about the examples of epigenetics mentioned in the guide. Lion and tiger hybrids have taught us about epigenetic inheritance, molecules such as hormones and...
ATL in Biology
Cryptic messages - bioinformatics introduction
Before looking at database searches using BLAST or FASTA and the six different ORFs it is important to have an understanding of the terminology used in the databases of protein structures and genetic...
Activities
Coral reef formation (2025)
Coral reefs have a biodiversity which is almost a great as tropical rainforest. There are many species of algae, invertebrates and fish living together in reefs creating vibrant ecosystems. This activity...
Activities
Range of tolerance lab (2025)
This lesson begins by considering what it is like to be a small plant growing in some dunes. This explores the abiotic factors in this habitat and the adaptations of grass plants. Understanding the needs...
Activities
Intro to gene expression (2025)
These activities are all about the control of gene expression in cells and how the functioning proteins which the genes code for can be produced in large quantities or not expressed at all. This presence...
Activities
Limiting factors and experiments (2025)
This activity introduces a simple method of measuring the rate of photosynthesis and leads students to design their own investigation of a factor which affects it. A second activity illustrates how the...
Activities
Activity 2 - Related species karyotype - model answers
This page shows suggestions of model answers for the Related species karyotype activity on the page Species & their karyograms (2025) These are suggestions of model answers, written in the way a student...
Assessment - introduction
Communication in Biology IAs 2025
The IA is an opportunity for DP Biology students to work as Biologists for a few weeks in the course. The assessment criteria have a focus on practical aspects such as, design of the investigation; collection...