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Describe the structure of DNA in the eukaryotic cell

DNA is a double stranded helix. Each strand is held together by complementary base pairs or nucleotides. A nucleotide consists of a base, a deoxyribose sugar and a phosphate. The bases are A, T, C and G. G a...
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Answered by Megan L. • Biology tutor
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What is the difference between conservation and preservation regarding species

Although they both promote sustainability: Conservation is the human involvement in attempts to protect wildlife. Usually with endangered species where they can be tracked and looked after with human help, t...
AC
Answered by Aadil C. • Biology tutor
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Describe what is meant by the 'lock and key' theory.

When binding two things together in biology, such as an enzyme and a substrate, in order to fit together they musth ave a specific shape. The shape of the enzyme active site must be the reciprocal to the sha...
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Answered by Lily W. • Biology tutor
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Describe the steps of mitosis

Mitosis is one of the two types of cell division which leads to the production of two genetically identical diploid daughter cells (2n) from one original diploid parent cell (2n). The steps of mitosis are (i...
LR
Answered by Luke R. • Biology tutor
8350 Views

How do two neurones interact at synapse?

When an action potential reaches the synaptic knob of the pre synaptic neurone, this causes calcium ion channels to open. This leads to an influx of calcium ions ( Ca2+) into the synaptic knob. Presence of C...
TD
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