Search over 10,000 free study notes

Worth four marks
Enzymes are biological catalysts which are used in reactions. A reaction will typically involve an enzyme and a substrate. Enzymes a...

During photosynthesis, green plants use carbon dioxyde and water, and with light energy convert them to glucose and oxygen. There are two phases of this process, the light-dependent phase which needs the ...

Osmosis is the passive movement of water from an area of high water concentration (dilute solution) to an area of low water concentration (concentrated solution) across a partially permeable membrane down...

Eukaryotes: animals and plantsmany eukaryotes are complex, multicellular organisms cells contain membrane bound organelles (such as a nucleus)
Prokaryotes: bacteria and archaeasingle celled organism...

Variation among genes codes for different phenotypes in a population. Individuals that have a phenotype that is better suited to their environment are more able to survive and reproduce, and therefore, ha...