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Define "cellular immune response".

An immune response mediated by T lymphocytes.
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Answered by Owen F. • Biology tutor
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What are the similarities and differences between DNA and RNA?

DNA and RNA are structurally almost identical, but there are a number of key differences. The 'D' in DNA stands for deoxyribose - the sugar molecule that gives DNA a stable helical conformation (called a B-h...
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Answered by Tristan D. • Biology tutor
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What is the difference between eukaryotic cells and prokaryotic cells?

The main difference between eukaryotes and prokaryotes is that eukaryotic cells contain membrane-bound organelles (this includes a nucleus). Eukaryotes can be a single-celled or multi-celled organisms, such ...
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Answered by Sarah L. • Biology tutor
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Explain what phototropism is and why plants might benefit from positive phototropism.

Phototropism is a growth response to a light stimulus.Positive phototropism causes the stems of plants to grow towards a light source causing the leaves of the plant to be pointing towards the lgth source. t...
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Answered by Rachel S. • Biology tutor
34793 Views

Why does the rate of an enzyme reaction not just always increase with temperature? Why does it fall after a point?

Enzymes have an area on them known as the ACTIVE SITE. This active site is shaped to fit the substrate that will bind to it -complementary fit. Eventually, the bonds in the active site of the enzymes are goi...
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Answered by Jacob P. • Biology tutor
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