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  • Biology Factsheet: 175. Haemoglobin: Structure & Function

    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 info
  • Biology Factsheet: 176. Penicillin Production and Use

    Biology 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 info
  • Biology Factsheet: 177. Nitrogen Fixation

    Biology 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 info
  • Biology Factsheet: 178. Infectious Diseases

    Biology 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 info
  • Biology Factsheet: 179. Answering Exam Questions: Mutation

    Biology 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 info
  • Biology Factsheet: 180. Antibiotic Use And The Rise Of Clostridium Difficile

    Biology 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 info
  • Biology Factsheet: 181. Why Are Viruses So Successful?

    Biology 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 info
  • Biology Factsheet: 182. Disrupting Food Chains and Webs

    Biology 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 info
  • Biology Factsheet: 183. Variations from expected Mendelian Monohybrid Ratios

    Biology 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...

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  • Biology Factsheet: 184. Investigating Sand Dunes

    Biology 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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