GCE AQA BIOL - Cells
Unit 3.1 Biology and disease
3.1.3 Substances are exchanged between organisms and their environment by passive or active transport across exchange surfaces. The structure of plasma membranes enables control of the passage of substances across exchange surfaces.
Cells are the smallest unit of living things 🧫. For GCE AQA Biology, you should be familiar with their organelles - appearance, function, and ultrastructure. 🦠
Plasma membrane/cell-surface membrane
Rough endoplasmic reticulumAppearance
Smooth endoplasmic reticulumAppearance
All together in a cell, the organelles are arranged as follows:
Cell structure & functionAlthough most animal cells contain some number of these organelles, some cells will contain more or less of specific organelles depending on their function. For example:
You will also be asked to examine an intestinal epithelial cell in GCE AQA Biology. Special organelles to look out for include:
That's all for today!
Wanna Boost Up Your GCE AQA Biology? Check out our study tips here!
Written by Justine | Biology Specialist @ Tuttee
Toole, G., & Toole, S. (2015). Aqa biology A level. Oxford: Oxford University Press.
We just sent you an email. Please click the link in the email to confirm your subscription!