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Describe the process of Oxidative Phosphorylation in the light dependent stage of photosynthesis

Light that falls onto a photosystem excites two electrons in a chlorophyll molecule, causing the electrons to leave the molecule by Photoionization. These two electrons are absorbed by the thylakoid membrane...
EM
Answered by Eleanor M. • Biology tutor
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How are action potentials transmitted from one nerve to another?

Action potentials need to be transmitted over the synaptic cleft. This is achieved by the electrical impulse being converted into chemical and then back to electrical. First the action potential reaches the ...
CS
Answered by Craig S. • Biology tutor
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Describe and explain how a nerve impulse is transmitted across a cholinergic synapse.

An action potential from the presynaptic neurone arrives at the presynaptic knob. This process causes voltage-gated Calcium ion channels in the presynaptic membrane to open. Calcium ions then diffuse into th...
AL
Answered by Alex L. • Biology tutor
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Explain how high absorption of salt from the diet can lead to a build-up of tissue fluid

High absorption of salt from the diet results in a higher than normal concentration of salt (sodium chloride) in the blood plasma entering capillaries. This means that there is a higher concentration of sodi...
AR
Answered by Assen R. • Biology tutor
15561 Views

What is meant by the primary structure of a protein and why is it so important?

The primary structure of a protein is the sequence in which the amino acids are joined. The only bonds involved in the primary structure of a protein are peptide bonds (between the amino acids). Proteins are...
SS
Answered by Shiv S. • Biology tutor
9630 Views