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Describe and explain the process of transcription in protein synthesis.

Hydrogen bonds that link complementary DNA base pairs in the cell's nucleus break and exposes the bases.Free RNA nucleotides in solution combine with their complementary bases of the single DNA strand.A w...

Answered by Nichola C. • Biology tutor

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Outline how antibiotics offer protection from certain forms of infectious disease.

Ever since the accidental discovery of Penicillin by Alexandre Fleming in 1928, antibiotics have revolutionised modern medicine. Also known as 'anti-bacterials' they are used to treat often deadly bacteri...

Answered by David R. • Biology tutor

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How do neurotransmitters transmit action potentials across synapses?

The process can be broken down into 3 main stages. 1 - An Action Potential triggers Calcium Influx: when the action potential arrives at the synaptic knob of the presynaptic neurone, it s...

Answered by Trishnaah S. • Biology tutor

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What is osmosis? A diagram may be useful for your explanation

Osmosis is the passive movement of water across a semi permeable membrane from an area of high concentration to an area of low concentration.

Answered by Omar A. • Biology tutor

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Explain why a mutation in the viral RNA leads to a change in the 3D shape of the protein antigens (3 marks)

A mutation in the viral RNA results in a change in the RNA base sequences. This can result in a change in the amino acid sequence during translation. This then changes the position of intramolecular bonds...

Answered by Virad K. • Biology tutor

12496 Views