Zadanie 2a
Outline why the tissue discs should be equal in size.
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Outline why the tissue discs should be equal in size.
Describe how the bath temperature could be checked during each incubation to establish that it stayed constant.
Outline one reason for the independent repeats at each temperature.
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A second group instead compares each solution by eye with five reference dilutions labelled 1 (palest) to 5 (darkest). Suggest two advantages of a colorimeter over this visual scale.
Identify the type of nucleic acid that makes up a coronavirus genome.
List two mechanisms by which a coronavirus genome could acquire a mutation.
Explain two reasons, apart from a high mutation rate, why a viral population can evolve rapidly.
Two purified triglyceride mixtures have fatty acid chains of similar length. Mixture X contains many cis double bonds and melts below mixture Y. Which explanation is consistent with this result? A. The double bonds make X a polymer of glycerol B. Kinks in the…
Two upright oat coleoptiles receive light from the left. A thin impermeable insert is placed just below the tip on opposite sides of P and Q. The diagram records their appearance before and after exposure. (i) Identify the directional response of Q. (ii)…