Top answers

what is eutrophication

eutrophication is whereby excess feriliser from farmland has run off into areas of water such as lakes or rivers. algae growth is promoted due to the rise in phosphates. in turn the remaining oxygen in the w...
CH
Answered by Charlie H. • Biology tutor
2934 Views

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...
CB
Answered by Cameron B. • Biology tutor
4464 Views

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
10693 Views

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...
SM
Answered by Sara M. • Biology tutor
6592 Views

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...
AE
Answered by Alex E. • Biology tutor
4035 Views