What is a gene?

A gene is a specific section of a chromosome that codes for a particular sequence of amino acids to make a protein.

Related Biology A Level answers

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What is temporal and spatial summation in synaptic transmission?


DNA mismatch repair enzymes repair mainly bases on the newly synthesised DNA strand, using the old DNA strand as a template. If the mismatches were simply repaired without regard for which strand served as template, would this reduce replication errors ?


Describe and explain how fish are adapted for gas exchange.


The Pacinian corpuscle senses changes in pressure in the skin. Explain how pressure causes the cell to change its membrane potential to elicit a nerve response.


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