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Neurotransmission is the process that uses electrical or chemical signals to communicate between neurones, leading to the co-ordination of secretion, muscle contraction and organ and brain function in the...

A mutation of the gene leads to a change in the phenotype of the organism. For natural selection to occur this change must give the organism an advantage and therefore it has a higher chance of survival. ...

The lock and key model refers to an analogy used to describe the specific action of an enzyme with a substrate . During this process, the enzyme is acting as the lock and has a section called the active s...

Prophase, metaphase, anaphase, and telophase.

An antibody is a chemical released during an infection by lymphocytes that attach to specific antigens.