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By neurotransmitters. At a neuromuscular junction, the neurotransmitter is Acetylcholine released from vesicles in the pre-synaptic neurone. Receptors on the muscle cell surface bind acetylcholine in the ...

In the nervous system, information is carried by electrical impulses from sensory neurons to the brain, from the brain to motor neurons, and within the neurons of the brain itself. A synapse is a connecti...

DNA contains the nucleotide base thymine whereas mRNA contains the nucleotide base uracil instead

DNA is double stranded, mRNA is single stranded

DNA contains the sugar subunit deoxyribose, ...

CF is a homozygous recessive condition. This means that it is inherited, ie a child gets the condition by the genetic material passed on to it from its parents. Let's call the faulty allele f (which is al...

Amino acids are coded for by specific codons. There are some instances where some particular amino acids can be coded for by more than one codon (codon being three nucleotides bonded together). This is kn...