E. coli cells were spread on an agar plate, producing 1000 colonies.  The colonies are replica plated on two agar plates containing the antibiotic kanamycin and one agar plate without antibiotics.  All of the colonies are able to grow on the agar plate without antibiotic but only 4 colonies are able to grow on each of the agar plates containing kanamycin.  You notice that the four colonies that grew on each of the kanamycin containing plates are in the exact same position.  This demonstrates

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#Question id: 14888

#XL - S Microbiology

Given below are some cytokines and stimulated cell lines ;

Which one of the following is the correct match between the Interleukines and cell lines ?

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#Question id: 2089

#XL - S Microbiology

What type of single-pass membrane protein would contain a hydrophobic membrane spanning alpha-helix?

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#Question id: 4980

#XL - S Microbiology

If an increase in dicynodont species diversity (i.e., number of species) occurred soon after the Permian extinction, and if it occurred for the same general reason usually given for the increase in mammalian diversity following the Cretaceous extinction, then it should be attributed to

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#Question id: 19601

#XL - P Chemistry

What is the entropy change (in JK-1 mol-1) when 1 mole of ice is converted into water at 0℃? (The enthalpy change for the conversion of ice to liquid water is 6.0 kJ mol-1 at 0℃)

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#Question id: 3668

#XL - S Microbiology

In most plasmids, the genes for proteins required for replication are located very close to the ______________ at which their gene are transcribed.