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A biological catalyst used to increase or decrease the rate of reaction.

1) They contain a variable region also called the Fab region, allowing the attachment of an antigen to the antibody

2) They contain 2 light chains and 2 heavy chains allowing a sturdy str...

Alleles are different forms of the same gene which are located on the same part of the chromosome. 

Genes are made up of information needed to produce different proteins, so allele...

Mitosis occurs in a continuous, sequential order and has 5 stages:
1) Prophase
2) Metaphase
3) Anaphase
4) Telophase. 
Interphase
Interphase occurs before Mi...

Leaching from the excessive use of fertilisers causes a nutrient build up in neighbouring rivers or lakes. As a result of the increased nutrients plants within the lake or river grow rapidly, including al...