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What is the difference between DNA and mRNA?

DNA is much longer than mRNA and forms a chromosome, whereas mRNA is much shorter; corresponding to a single gene. DNA is structurally different; it is usually found as a double helix and contains the base t...
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Answered by Charlotte M. • Biology tutor
5060 Views

Explain the need for neuronal communication over chemical signalling or passive electrical signalling

Neurons are required to send messages at high speeds over long distances. For example, reflex reactions occur in the order of fractions of seconds, and some neurons carry messages over 1m in distance.Accordi...
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Answered by Rose F. • Biology tutor
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Explain how a plant is able to make glucose from carbon dioxide.

Plants carry out photosynthesis which contains the light dependant and light independent reaction . CO2 is used in the light independent reaction- the Calvin cycle. Co2 enters the stroma in a chloroplast and...
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Answered by Elsa W. • Biology tutor
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Describe the process of Oxidative Phosphorylation in the light dependent stage of photosynthesis

Light that falls onto a photosystem excites two electrons in a chlorophyll molecule, causing the electrons to leave the molecule by Photoionization. These two electrons are absorbed by the thylakoid membrane...
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Answered by Eleanor M. • Biology tutor
4831 Views

Describe the similarities and differences between DNA and RNA structures

Structurally, DNA and RNA are very similar. They're both composed of a backbone of sugar, a phosphate group and a chemical base. However, the sugar in DNA is a deoxyribose sugar and the sugar in RNA is a rib...
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Answered by Shannon M. • Biology tutor
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