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

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#Question id: 19541

#SCPH05 I Biotechnology

Which has the maximum electropositive character?

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#Question id: 5560

#SCPH28 | Zoology

In a newly fertilized egg, the vitelline layer ________.

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#Question id: 4126

#SCPH28 | Zoology

Which one of the following is true about the genetic code?

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#Question id: 11382

#SCPH06 I Botany

Ecologist has proposed following explanation to lead biodiversity at tropic.

a) Higher productivity in the tropics allows for more species

b)  Environments are more stable and predictable in the tropics, with fairly constant temperatures and rainfall levels year-round

c) Predators and pathogens limit competition in the tropics, which allows more species to coexist

d) High evolutionary speed at tropic than temperate

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#Question id: 57

#SCPH28 | Zoology

A(n) ________ has charge but negligible mass, whereas a(n) ________ has mass but no charge.