Key words/terms for As Biology topic 4 - Biodiversity - Unit 2

Some of the key terms and concepts needed to be known for the exam

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  • Created on: 27-05-13 12:21
Preview of Key words/terms for As Biology topic 4 - Biodiversity - Unit 2

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Alpha glucose ­
Beta glucose ­
Adhesion molecule ­ these are recognition proteins which are specific to a cell type. It helps that
cell recognise other cells which are the same and sticks them together
Amyloplast ­ these are non-pigmented organelles found in some plant cells. They store starch and
synthesize (copy it)
Antibacterial - An antibacterial is an agent that inhibits bacterial growth or kills bacteria. The term is
often used synonymously with the term antibiotic
Biofuel - A fuel derived directly from living matter
Carbon cycle ­ carbon is found in all living organisms and the carbon cycle is the process by which it
moves into living tissue and then recycled via processes like respiration, burning and decaying of
dead organisms into the atmosphere, hydrosphere, biosphere and geosphere
Carbon dioxide ­ a natural environment like forests ability to absorb carbon dioxide
Cell wall ­ A rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants,
fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose

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Cellulose ­ is made from 2 beta glucose molecules and is insoluble. It is part of plant cell walls.…read more

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The concept of a niche
The way that an organism exploits (uses) its environment.
Species living in the same area tend to use different places to take shelter and different ways of
acquiring food or to breed. If 2 or more species exploit the same resource for survival they may
come into conflict and have to compete if the situation changes the availability (eg.…read more


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