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Putting bee honey on a cut kills bacteria. Honey contains a high concentration of sugar. Use your knowledge of water potential to suggest how putting honey on a cut kills bacteria. (AQA BIOL1)

Sugar is a solute and is able to dissolve in water. When sugar is dissolved in water, it has a low water potential. Water moves from a high water potential to a low water potential; from where there is a low...
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Answered by Charlotte S. • Biology tutor
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What is the Difference between saturated and unsaturated fatty acids?

Firstly, saturated fatty acids are where all the carbon atoms have single bonds between them making the lipid saturated as no more hydrogens can be added. Having no double bond means the fatty acid is straig...
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Answered by Katie D. • Biology tutor
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What is the difference between breathing and respiration?

Breathing is the physical process where you inhale and exhale air in and out of your lungs. Inhaling brings in air containing Oxygen, which is absorbed and exchanged for Carbon Dioxide. The Carbon Dioxide, n...
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Answered by Portia H. • Biology tutor
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What are the names given to the body's first and second line of defence against disease? Name an example for each and how it works to prevent disease.

The first line of defence is passive immunity. An example is the skin and its job is to prevent a pathogen entering the body in the first place. Pathogens cannot penetrate the skin. The second line of defenc...
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Answered by Eric P. • Biology tutor
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Describe transcription and translation.

Transcription is the making mRNA from DNA. Translation is using the mRNA to code for a protein.
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Answered by Clemmie B. • Biology tutor
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