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Explain how a mutation in the gene coding for an enzyme could lead to the production of a non-functional enzyme.

The base sequence changes so the amino acid sequence changes therefore leading to a change in the types and location of bond formation thus a change in the tertiary structure occurs. This prevents the enzyme...
Answered by • Biology tutor
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Describe how the products of the Light dependent stage of photosynthesis are used in the Calvin cycle (3marks)

Reduced NADP is used to reduce GP to TP. The ATP provides the energy needed for the reduction of the aforementioned reaction. It also provides a phosphate ion to regenerate RuBP from TP.
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Answered by Bill C. • Biology tutor
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Explain the Bohr shift.

The Bohr shift should be explained using the relative affinities of haemoglobin to carbon dioxide and oxygen due to changes in pH level. When pCO2 is high in cells (i.e in muscle cells when one is exercising...
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Answered by Lucas L. • Biology tutor
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How does a simple reflex work?

A pain stimulus, for example, pressure from a pin, is sensed by a receptor, for example, pacinian corpuscle in the skin of the fingertip.This causes a change in shape of the receptor, so sodium ions diffuse ...
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Answered by Tara S. • Biology tutor
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What is a first messenger hormone?

A first messenger is a hormone which binds to a receptor on the plasma membrane of a cell and causes a change to happen inside the cell
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Answered by Laura H. • Biology tutor
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