Which of the following alkaline earth metal ions has the highest ionic mobility in aqua solution?

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#Question id: 2676

#SCPH06 I Botany

The structural genes of lac operon transcribe mRNA which is

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#Question id: 11966

#SCPH28 | Zoology

Stomach cells are moderately well adapted to the acidity and protein-digesting activities in the stomach by having ________.

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#Question id: 16478

#SCPH06 I Botany

Histolytic cultures are used to study 

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#Question id: 15658

#SCPH06 I Botany

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:

 

As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.

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#Question id: 2678

#SCPH05 I Biotechnology

Insertional inactivation of the lacZ gene on a plasmid can be used to screen for recombinants on a plate containing: