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Describe Protein Synthesis

DNA is unzipped by a helicase, the gene to be encoded is transcribed to mRNA by the enzyme RNA polymerase, in mRNA the thymine base is substituted by uracil. The mRNA leave the nucleus via a nuclear pore and...
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Answered by Cameron B. • Biology tutor
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What is temporal and spatial summation in synaptic transmission?

Synaptic transmission, whether chemical or electrical, results in a change in membrane potential of the post-synaptic cell. If an excitatory synapse is activated, this results in a depolarization of the post...
MM
Answered by Marie M. • Biology tutor
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Can you describe the structure of the DNA MOLECULE?

The Dna molecule is an antiparallel double helix made up of a sugar, a phosphate group and different bases pared with each other. These basis are Adenine (A), Guanine (G), Cytosine (C) and Thymine (T) and ar...
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Answered by Sara M. • Biology tutor
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Can you describe the path of electrical conduction through the human heart?

Special cells make a patch in the right atrium known as the sino-atrial node (SA node), these cells can depolarise themselves! When these cells depolarise, they cause depolarisation of cells nearby, these si...
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Answered by Alex E. • Biology tutor
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What specialised structures do the lungs have to allow diffusion of gases?

The lungs are highly specialised. They have alveoli which are small air sacs. Alveoli give the lungs a big surface area, meaning that more oxygen can diffuse from the lungs into the blood stream, and more wa...
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Answered by Bethany H. • Biology tutor
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