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How is enzymatic activity affected by temperature and substrate concentration?

Increasing temperature gives more kinetic energy to both enzyme and substrate so they move more and with more energy. They can then collide more frequently allow more binding so the rate of reaction increase...
AM
Answered by Afrasiyab M. • Biology tutor
3680 Views

Name 2 forms of epigenetic modification, and explain the effect they have on the genotype.

Acetylation: addition of an acetyl group to a histone molecule. Forces DNA strands apart, allowing easier access for RNA polymerase for transcription. Therefore increases expression of target gene(s) due to ...
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Answered by Nick G. • Biology tutor
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What is fractional distillation used for in industry? Explain the molecular basis behind it.

Separating different sized hydrocarbons (from crude oil)Different length hydrocarbons have different strength VDW forces between their moleculesTherefore longer length hydrocarbons have stronger VDW forces b...
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Answered by Nick G. • Chemistry tutor
2754 Views

Describe the chemical composition of phospholipids and how they form cell membranes? (10 marks)

Phospholipids are amphipathic molecules i.e. they have a hydrophilic (“water-loving”), polar head end, and a hydrophobic (“water-fearing”), nonpolar tail end (1 mark). The major phospholipids in most animal ...
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Answered by Akash B. • Biology tutor
7498 Views

Why is it "Ich wohne hier seit 4 Jahren" and not "Ich habe hier seit 4 Jahren gewohnt"?

The latter would seem to make sense, as it is a direct translation of the English " I have lived/have been living here for 4 years ", however, when describing the length of time that an action has ...
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Answered by Tatyana B. • German tutor
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