Summary AQA A Level Biology Topic 2 Cells Notes

AQA A Level Biology


Topic 2 Cells
Model answer notes by @biologywitholivia



Topic Sub-topic Understand Memorise Practise


2.1 Cell 2.1.1 Structure of eukaryotic cells
structure
2.1.2 Structure of prokaryotic cells and of viruses


2.1.3 Methods of studying cells


2.2 2.2 All cells arise from other cells
All cells arise
from other cells Required practical 2


2.3 2.3 Transport across cell membranes
Transport
across cell Required practical 3

membranes
Required practical 4


2.4 2.4 Cell recognition and the immune system
Cell recognition
& the immune
system

, AQA A Level Biology Topic 2 Cells biologywitholivia.co.uk


2.1 Cell structure
2.1.1 Structure of eukaryotic cells
What are the distinguishing features of eukaryotic cells?

● Cytoplasm containing membrane-bound organelles
● So DNA enclosed in a nucleus



Describe the general structure of eukaryotic cells




Algal and fungal cells are similar to plant cells. See differences above.


Describe the structure of the cell-surface membrane




More detail covered in 2.3 Transport across cell membranes.


Describe the function of the cell-surface membrane

● Selectively permeable → enables control of passage of substances in / out of cell
● Molecules / receptors / antigens on surface → allow cell recognition / signalling




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