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 mutation, designated MelB–, which gives uninducible melibiase activity. Mapping experiments show that MelB– is linked to Mel1. Using an F' factor that carries the chromosomal region surrounding Mel1, you perform the following genetic tests:

 

Describe the proposal for the type of regulatory functions affected by the MelB– mutation.

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#Question id: 17213

#SCPH05 I Biotechnology

Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer can not take place

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#Question id: 5036

#SCPH06 I Botany

 The experiments of Spemann and Mangold first defined what feature of amphibian embryos?

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#Question id: 11551

#SCPH28 | Zoology

Polypeptides can have which of the following types of effects?

I) autocrine

II) paracrine

III) endocrine

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#Question id: 584

#I Life Science/ Life Sciences Group – I-V

The non-enzymatic hydrolysis of sucrose into glucose and fructose is an example of a pseudo first-order reaction because

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#Question id: 3903

#SCPH28 | Zoology

The type of RNA that is least stable in cells is __.