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  • Biology Factsheet: 158. Answering Questions: Growth of Organisms

    Biology Factsheet: 158. Answering Questions: Growth of Organisms

    Even if microbiology is not on your specification, you may still face a question about the growth of bacteria/yeast/algae etc in the exam!  Why? Because the examiners aren’t really testing...

    Price £3.00more info
  • Biology Factsheet: 159. The Structure and Function of Polysaccharides

    Biology Factsheet: 159. The Structure and Function of Polysaccharides

    This Factsheet summarises:  • The structure of the polysaccharides starch, glycogen and  cellulose.  • The functions of polysaccharides.  • How structure is rela...

    Price £3.00more info
  • Biology Factsheet: 160. Countercurrent Flow in Biology

    Biology Factsheet: 160. Countercurrent Flow in Biology

    Countercurrent flow is a mechanism which maintains diffusion  gradients across membranes. In turn, this means that transport or  exchange of substances across the membrane can be fast and&...

    Price £3.00more info
  • Biology Factsheet: 161. Negative Feedback Mechanisms

    Biology Factsheet: 161. Negative Feedback Mechanisms

    This Factsheet summarises the most important examples of negative  feedback in living organisms....

    Price £3.00more info
  • Biology Factsheet: 162. The Biology of HIV

    Biology Factsheet: 162. The Biology of HIV

    HIV is on all A level specifications. Exam questions are common  and relatively straightforward. You simply need to learn a few facts  and then practice applying this knowledge to the type...

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  • Biology Factsheet: 163. Answering Questions: enzyme activity

    Biology Factsheet: 163. Answering Questions: enzyme activity

    This Factsheet summarises the most common questions about enzyme activity that have appeared over the 5 years on all the Boards. ...

    Price £3.00more info
  • Biology Factsheet: 164. Recording Plant Species

    Biology Factsheet: 164. Recording Plant Species

    Practical ecological techniques frequently appear in exam questions  but many candidates have not had much opportunity to actually  get out there and measure things. This Factsheet sets ou...

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  • Biology Factsheet: 165. Surface Area and Volume

    Biology Factsheet: 165. Surface Area and Volume

    The surface area to volume ratio is a crucial biological concept. It  helps explain, amongst other things why:  • organisms that rely upon diffusion are condemned forever to be  ...

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  • Biology Factsheet: 166. Answering Exam Questions: Kidney problems

    Biology Factsheet: 166. Answering Exam Questions: Kidney problems

    Exam questions sometimes test student’s understanding of the kidney and of basic physiological processes by focusing on kidney  problems. Such questions, which are usually based on dialysi...

    Price £3.00more info
  • Biology Factsheet: 167. Biosensors

    Biology Factsheet: 167. Biosensors

    A biosensor is an analytical instrument which converts a biological response into an electrical signal. They are to detect specific  substances or conditions. For example, a glucose biosensor ca...

    Price £3.00more info
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