GCSE Biology OCR B J257

B4.2: How do we know about mitochondria and other cell structures?

#B4.2.1

explain how electron microscopy has increased our understanding of sub-cellular structures

#B4.2.2

in the context of cells and sub-cellular structures:

a) demonstrate an understanding of number, size and scale and the quantitative relationship between units b) use estimations and explain when they should be used **c) calculate with numbers written in standard form **

B4.1
What happens during cellular respiration?
B4.3
How do organisms grow and develop?