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Describe the process of oxidative phosphorylation

There are four main electron carrier protein complexes in the inner mitochondrial complex, which use the energy from the transfer of electrons to pump H+ into the intermembrane space, this is known as the el...
TB
Answered by Thomas B. • Biology tutor
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How do synapses work?

When an action potential reaches a presynaptic cell, it causes voltage-gated ion channels in the membrane to open, which allows Ca2+ to enter the cell. This Ca2+ diffuses into the cell from high to low conce...
SB
Answered by Sam B. • Biology tutor
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What are the differences between diffusion, active transport and osmosis?

Diffusion is a passive process, this means that no energy is required, where there is a net movement of particles from an area of high concentration to an area of low concentration down the concentration gra...
MD
Answered by Matthew D. • Biology tutor
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Ben has red hair, and his wife has brown hair. The allele for red hair is recessive (r) and the allele for brown hair is dominant (B). Their son also has red hair. What is the genotype of Ben's wife?

We know red hair is recessive, so to have red hair you must have to have two red hair alleles, therefore Ben's genotype must be rr.However, the brown hair allele is dominant, this means you can have either o...
HD
Answered by Helen D. • Biology tutor
4188 Views

Describe the process of a simple reflex action (6marks)

Receptors in the skin which are sensitive to changes in pain, pressure and temperature detect a change in one of these factors. This acts as the stimulus for the reflex response. This stimulus triggers an el...
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Answered by Jenna H. • Biology tutor
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