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Biology
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MRSA and C. difficile are resistant bacterial strains which cause life-threatening infections in hospitals. Explain how MRSA/ C. difficile could arise from non-resistant bacteria. [6 marks]

Natural SelectionCompetition for survival between bacterial colonies/ Selection pressure is survivalVariation between colonies linking to phenotype of resistanceSpontaneo...

Answered by Ijaz C. Biology tutor
1947 Views

What is osmosis?

Osmosis is the passive diffusion of water, which therefore, doesn't require any energy to occur. Typically water will move from an area of high concentration to an area of low concentration across a semi-...

Answered by Matthew W. Biology tutor
2380 Views

Name the key differences between Eukaryotic and Prokaryotic cells?

Eukaryotic cells are typically belonging to multicellular organisms, with exceptions of algae and amoebae. These cells always have multiple linear chromosomes (genetic material) and contain a nucleus (hou...

Answered by Matthew W. Biology tutor
1359 Views

how might a competitive inhibitor prevent the enzyme trypsin from working

inhibitor is a similar shape to the substrate
this means the inhibitor blocks the active site of the enzyme
the substrate cannot bind to the active site, so fewer enzyme substrate complexes can ...

Answered by Biology tutor
1637 Views

Tell me what occurs in the prophase in mitosis.

ProphaseThe nuclear envelope breaks down exposing the chromatin The chromatin supercoils into chromosomes - can be viewed under the microscopeSpindles starts to form

Answered by Jasleen G. Biology tutor
1973 Views

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