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What is diffusion?

Diffusion is a passive process that involves the movement of ions from an area of high concentration to an area of low concentration through a semi permeable membrane until an equilibrium has been reached.
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Answered by Amelia K. • Biology tutor
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How does transcription work?

Transcription is the first step of protein synthesis and occurs within the nucleus of the cell. Within the cell's nucleus is the DNA. Firstly an enzyme called DNA Helicase 'unzips' the two DNA strands separa...
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Answered by Charlotte K. • Biology tutor
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Explain how an action potential is generated in a sensory neurone.

DIAGRAM At rest, there is a potential difference across the cell surface membrane of -60mV maintained by sodium-potassium ion pumps which pump 3 Na+ ions out of the cell for every 2 K+ ions pumped in. When a...
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Answered by Alastair M. • Biology tutor
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What are the similarities and differences between animal cells and plant cells?

firstly, animal cells and plant cells are both eukaryotic cells which means both cells have nuclear material within a nucleus. As well as this they will both have cell organelles such as mitochondria. And fi...
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Answered by Harkaram S. • Biology tutor
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List the phases of mitosis in order, and give a brief explanation of each phase.

An easy way to remember the stages of mitosis is- preparation may achieve the impossible Prophase-preparationMetaphase-mayAnaphase-achieveTelophase-theInterphase-impossible. Prophaseis the first phase, where...
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Answered by Alex M. • Biology tutor
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