Slides in this set
B2 1.1 Animal and plant
Most human cells are like most other animal cells
and contain a nucleus, cytoplasm, cell membrane,
mitochondria and ribosomes.
Plant and algal cells contain all the structures seen
in animal cells as well as a cell wall. Many plant
cells also contain chloroplasts and a permanent
vacuole filled with sap.…read more
B2 1.2 Bacteria and Yeast
A bacterial cell consists of cytoplasm and a
membrane surrounded by a cell wall. The genes
are not in a distinct nucleus.
Yeast is a single-celled organism. Each cell has a
nucleus, cytoplasm and a membrane surrounded
by a cell wall.…read more
B2 1.4 Diffusion
Dissolved substances and gases such as oxygen
move in and out of cells by diffusion.
Diffusion is the net movement of particles from an
area where they are at a high concentration to an
area where they are at a lower concentration.
The greater the difference in concentration, the
faster the rate of diffusion.…read more