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Describe the processes involved in protein production within a cell

First, DNA-helicase (an enzyme) separates the two strands of DNA to allow RNA polymerase (another enzyme) to produce messenger RNA (mRNA) from free nucleotides, coded for by a gene in the DNA. The mRNA then ...
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Answered by Oisin B. • Biology tutor
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Understanding HIV, vaccines and monoclonal antibodies

To understand how HIV causes infection, students should have an appreciation for its basic virus structure and how it infects humans. Following infection, how does it cause disease and eventually AIDS? Why a...
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Answered by Subi S. • Biology tutor
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How does osmosis work?

Thinking of osmosis represented by two water towers attatched with a pipe at the bottom helped me to understand. If one tower has a higher level of water than the other, water will flow into the other to eve...
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Answered by Helena B. • Biology tutor
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Explain how an impulse is transmitted between nerve cells.

An impulse reaches the pre-synaptic neurone, as it does so, the impulse stimulates voltage-gated calcium channels to open, allowing an influx of calcium ions into the pre-synaptic bouton. This stimulates ves...
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Answered by Jasmine K. • Biology tutor
3954 Views

What factors affect photosynthesis and why?

Temperature - the light-independent reaction is temperature sensitive due to being enzymed controlled CO2 - Is needed as a source of carbon Light intensity- Needed to 'excite' the chlorophyll (allow their el...
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Answered by Millie O. • Biology tutor
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