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State the advantage for a plant of having many different accessory pigments in the photosystem:

This allows for the absorption of a range of different wavelengths of light.
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Answered by Rishitha J. • Biology tutor
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Outline the role of the Golgi Apparatus:

The Golgi Apparatus modifies proteins by adding molecules onto them for example; glucose to make glycoproteins. These proteins are then re-packaged into Golgi vesicles for transport to other organelles.
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Answered by Rishitha J. • Biology tutor
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How does the structure of DNA make it an effective carrier of genetic information?

DNA is a very long molecule (one cell contains about 2 metres of DNA!), meaning its coiled structure around proteins called histones allows it to fit into the small space of the nucleus. It also has a double...
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Answered by Charlotte C. • Biology tutor
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How does acetylcholine transmit the nervous impulse across a synapse?

An action potential from the axon arrives at the presynaptic neuron, stimulating voltage-gated calcium (Ca 2+ ) ion channels to open. This allows calcium ions to diffuse into the synaptic knob, causing synap...
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Answered by Charlotte C. • Biology tutor
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Which molecule has the highest boiling point: methane, ammonia, water or hydrogen fluoride? Explain why.

Answer: water, followed by hydrogen fluroide, ammonia and lowest is methane. Explanation: First it helps to write the molecular formulae of these molecules and know their shape: Methane: CH 4 , tetrahedral A...
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Answered by Peter W. • Chemistry tutor
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