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Biology Factsheet: 175. Haemoglobin: Structure & Function
Haemoglobin is the oxygen – carrying pigment in red blood cells. It is a globular protein consisting of four tightly packed polypeptide chains. ...
Price £3.00more infoBiology Factsheet: 176. Penicillin Production and Use
In 1928, Alexander Fleming discovered that one of his agar plates, containing a culture of the bacterium Staphylococcus aureus, was contaminated by the fungus Penicillium....
Price £3.00more infoBiology Factsheet: 177. Nitrogen Fixation
Every living organism needs nitrogen to make nucleic acids and proteins. But before atmospheric nitrogen can be used, the strong triple bond between the two nitrogen atoms has to be brok...
Price £3.00more infoBiology Factsheet: 178. Infectious Diseases
In 1900 life expectancy was 40-45 years, by 2000 the average life expectancy was around 75 years. Advances in the prevention and cure of infectious diseases largely achieved this improve...
Price £3.00more infoBiology Factsheet: 179. Answering Exam Questions: Mutation
This Factsheet summarises where students commonly go wrong in answering questions about mutation. Candidates frequently confuse gene mutation with chromosome mutation. • Gene...
Price £3.00more infoBiology Factsheet: 180. Antibiotic Use And The Rise Of Clostridium Difficile
This Factsheet describes the Biology of Clostridium difficile and the problems that it is causing in hospitals around the world. ...
Price £3.00more infoBiology Factsheet: 181. Why Are Viruses So Successful?
Rabies, smallpox, poliomyelitis, hepatitis, influenza, the common cold, measles, mumps, chickenpox, herpes, rubella and the acquired immunodeficiency syndrome (AIDS) are all caused by viruses. ...
Price £3.00more infoBiology Factsheet: 182. Disrupting Food Chains and Webs
A food chain is a linear sequence of organisms, each of which feeds on the preceding organism. A food web is a series of interconnected food chains. ...
Price £3.00more infoBiology Factsheet: 183. Variations from expected Mendelian Monohybrid Ratios
Gregor Mendel demonstrated 3 key phenotypic ratios when he carried out a series of experiments investigating monohybrid crosses in garden peas. All Biologists need to know these ratios&n...
Price £3.00more infoBiology Factsheet: 184. Investigating Sand Dunes
Sand dunes are important habitats. In the exam, questions on sand dunes may test your understanding of succession, zonation, conservation management strategies or ecological sampling. You may d...
Price £3.00more info
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