Year 12 - Biology Unit 3-4


Unit 3 begins with some basic chemistry to help explain the structure and function of cells and their organelles. Cellular processes, such as respiration and photosynthesis, are covered in detail. A focus on how cells communicate includes the roles played by hormones and nerves, and the immune response to potential agents of disease.

Unit 4 looks at the question of how life changes and responds to challenges over time. Topics covered include the role of DNA, inherited characteristics and how the genetic makeup of a population can undergo change. More modern techniques of DNA manipulation and genetic engineering are also covered in detail.

Units 3 and 4 both include 2 SACs, which range from written reports of practical activities to responses to a set of structured questions. Unit 4 also includes an individual practical investigation, which will be presented as a scientific poster.

Whilst this subject is quite academic and has a demanding workload, there is also a degree of hands-on learning of some key scientific skills.


Nature of Biology textbook\


“Biology was hard, but when I looked back I loved it”

“Biology really helped me to understand the world that I live in”

“I can’t believe how Biology, Chemistry and PE all tie in together!”