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What is crossing-over?

In prophase I of meiosis, homologous, non-sister chromatids form connections called chiasmata at matching loci. The complex then splits to give chromatids with different combinations of genes than were prese...
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Answered by Emma S. • Biology tutor
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Where do all the stages of respiration (aerobic and anaerobic) happen?

The first part of aerobic respiration is to convert glucose into pyruvate in a series of reactions known as glycolysis, which happens in the cytoplasm of cells. Glycolysis consumes 2 molecules of ATP and pro...
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Answered by Eve L. • Biology tutor
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Describe the process that allows an action potential to be passed across a synapse in the parasympathetic nervous system.

The action potential arrives at the presynaptic knob and causes the depolarisation of the plasma membrane. This causes voltage gated calcium channels to open allowing calcium to diffuse into the presynaptic ...
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Answered by Rebecca O. • Biology tutor
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Explain the pathway of MPS following resistance exercise?

The cellular mechanism for increases in MPS post exercise is regulated through the activation of downstream components of mTOR signalling pathway (4EBP1 Thr37/46 and S6K1 Thr389) (Dreyer et al., 2006). Stimu...
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Answered by Christian S. • Biology tutor
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Describe to me the pupillary light reflex, and how the differences in light intensity cause this change.

Pupils can either dilate or constrict in response to changes in light intensity. In very bright light - the eyes constrict - as a protective mechanism In very dull light/dark conditions - the eye dilates - t...
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Answered by Aaminah M. • Biology tutor
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