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: 14826

#SCPH05 I Biotechnology

An advantage of the smaller size of prokaryotes, compared to eukaryotes, is

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#Question id: 12909

#SCPH06 I Botany

According to the diagram, arrange the steps in correct order: 

1. DNA is then digested by the Cas9 nuclease at specific points on both DNA strands. 

2. Homologous recombination to repair the break and incorporate the new DNA sequence then follows. 

3.The nuclease Cas9 is targeted to DNA by a guide RNA consisting of a specific 20 nucleotide spacer/targeting sequence (crRNA).

 4. That identifies the DNA to be modified, linked to a trans-activating (tracrRNA) sequence necessary for the recruitment and stability of Cas9 nuclease.

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#Question id: 19351

#SCPH28 | Zoology

Different organisms may preferentially use different codons to encode the same amino acid in the cases of such amino acids that are encoded by more than one codon this is called

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#Question id: 14143

#SCPH01 Biochemistry

The higher is the score in the alignment _________

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#Question id: 5690

#SCPH28 | Zoology

Species I is diploid (2n =4) with chromosomes AABB; related species II is diploid (2n = 6) with chromosomes MMNNOO .Which of the following chromosome  in allotriploid individuals?