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stemNRICH : Science, Technology, Engineering, Mathematics enriched  
Welcome to bioNRICH: the biology section of stemNRICH. This contains mathematical activities for students aged 14  19 designed to complement and enhance the study of biology.
Area of biological Maths  Style  Question  Description 

Basic maths in biology  Big and Small Numbers in Biology  10 individual questions using numbers big and small to calculate or estimate various quantities in simple biological contexts.  
Measurement and estimation  Birdbrained  Estimate how many eggs a bird should lay to maximise the number of chicks that will hatch in this introduction to optimisation.  
Graphs and equations  What biological processes might fit onto these graphs? What units and axes would be relevant? What functions would describe the graphs?  
Drug Stabiliser 
How does the halflife of a drug affect the build up of medication in the body over time?


Statistics in biology  
Very Old Man  Is it likely someone could have lived to 200 years old? Use statistics to investigate.  
Chisquared Faker  How could you massage this $\chi^2$squared test to reject the hypothesis?  
Moles and molarity  See also the Moles and Molarity section on the chemNRICH pages  
Mixed Up Mixture  A standard calibration for a spectrophotometric assay for lysozyme was performed and the data tabulated. The data have become mixed up. Can you reassemble it using the interactive card sorter?  
Dilutions  See also the Dilutions section on the chemNRICH pages  
Ratios and Dilutions  Scientists often require solutions which are diluted to a particular concentration. In this problem, you can explore the mathematics of simple dilutions.  
DNA and Genetics  The Genes of Gilgamesh  Is it possible to create a genetic stock of the type that the hero Gilgamesh was said to possess?  
Why Multiply When You're about to Divide?  The Polymerase Chain Reaction is a technique used to amplify the amount of DNA in a sample. Find out how it works here.  
Is Your DNA Unique?  Use combinatorics to analyse the liklihood of someone sharing your DNA.  
Shapes  Fitting Flat Shapes  Develop your understanding of area by visualising the best way in which you can pack various shapes together most efficiently. Does Nature pack shapes efficiently?  
Packing 3D Shapes  Can you visualise or sketch the packing of the sorts of 3D shapes which occur in nature?  
Advanced mathematics in biology  Use differential equations to model the evolution of a system of carnivorous predators and their vegetarian prey.  
Prepare for university  Get yourself ready for university with these questions and guidance on mathematical biology.  
Articles  Genetic Intrigue  Read this introduction to core topics in genetics. 
Can you work out how to produce the right amount of chemical in a temperaturedependent reaction?