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#Question id: 15226
#SCPH06 I Botany
DNA from Salmonella species, when digested with the restriction enzyme Xba I, gives around 15 fragments ranging from 25 kb to 680 kb This pattern of fragments, or ‘fingerprint’, is unique to that strain. If the same fingerprint is found from bacteria from other infected people, then it can be assumed that they were all infected from a common source. Thus, by comparing their eating habits, food sources, etc. the source of the infection can be traced to a restaurant, food item. The fingerprints are created and analysed by
TLS Online TPP Program
#Question id: 756
#I Life Science/ Life Sciences Group – I-V
The thermal denaturation of DNA may be reversed by cooling the solution. Rapid cooling allows:
TLS Online TPP Program
#Question id: 48
#SCPH01 Biochemistry
Which of the following statements regarding enantiomers true?
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#Question id: 3008
#I Life Science/ Life Sciences Group – I-V
The structures present in the hay infusions used in experiments on spontaneous generation that made them difficult to sterilize are
TLS Online TPP Program
#Question id: 1109
#SCPH28 | Zoology
What role do phosphatases play in signal transduction pathways?