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Explain briefly how mutations in the genome can lead to cancer. In your answer refer to and explain the process of protein synthesis.

The central dogma of modern genetics is simple: DNA - RNA - Protein (and, due to reverse transcriptase, RNA - DNA). It can therefore be seen that alterations in DNA sequence can have the downstream effect of...
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Answered by Lynden R. • Biology tutor
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Describe how mRNA is produced in humans.

DNA helicase separates the strands by breaking the hydrogen bonds.One of the strands is used as a template to transcribe the mRNA.(Complementary) base pairing occurs with free RNA nucleotides.A→U, T→A, C→G, ...
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Why does oxygen bind to haemoglobin easier the second time?

Binding the first oxygen molecule leads to a change in the tertiary structure of haemoglobin This uncovers the second haem binding site for another oxygen molecule to attach
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How would you test for the presence of glucose?

You gently heat the mixture and add 2-3 drops of Benedict's solution.If glucose is present, the solution will turn from blue to orange.
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Explain the process of synaptic transmission

When the action potential reaches the presynaptic knob , it causes calcium ion protein channels to open and calcium ions enter the presynaptic knob by facilitated diffusion .The increased concentration of th...
TD
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