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Describe the involuntary Relay Arc pathway of a nervous impulse, from the stimulus to the reaction

Stimulus eg (thorn prick) > Sensory Neurone > Relay Neurone (In Central nervous system) > Motor Neurone > Effector muscle (eg. in arm, to move hand away)Whiteboard would be use to draw pathway in...
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Answered by Isabella J. • Biology tutor
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Describe the process of synaptic transmission with regard to action potentials

the action potential arrives at the terminal of the axon. The arrival of the action potential will cause voltage gated calcium ions to open allowing the calcium ions to rush into the axon terminal. The arriv...
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Answered by Ali H. • Biology tutor
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Give two features of DNA AND explain how each one is important in DNA replication.

1. DNA is double stranded. This means that when the strands separate during replication, both strands can be used as templates to produce two new double stranded DNA ,each containing one of the original stra...
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Answered by Adam M. • Biology tutor
4462 Views

What are the types and effects of genetic mutations?

Insertion/deletion - one or more nucleotide pairs are put in/taken out of a sequence -> causes frameshift. Duplication - one or more bases are repeated -> leads to frameshift. Inversion - group of base...
ZK
Answered by Zofia K. • Biology tutor
2497 Views

Starting with mRNA in the cytoplasm, how are polypeptides produced?

The mRNA binds to a ribosome at the start codon. (1) The ribosome has a space for a tRNA molecule with a three base anticodon to bind to the complementary codon on the mRNA.(2) The tRNA brings the specific a...
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Answered by Alice T. • Biology tutor
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