You have isolated two mutations in the Lac operon that cause constitutive expression of Lac genes. You designate these mutants Lac1– and Lac2–. Making use of an F' that carries the Lac operon with the LacY gene mutated, you construct strains that you test for both ß-galactosidase activity and Lac permease activity with results shown below.

     

Classify each mutation as dominant or recessive and as cis- or trans-acting, giving the experimental result that allows you to arrive at each conclusion. Finally, deduce what type of Lac mutation best fits the properties of Lac 1– and of Lac 2–.

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#Question id: 2634

#SCPH05 I Biotechnology

Tryptophan, the end-product of the enzymes encoded by the trp operon, therefore acts as a co-repressor and inhibits its own synthesis through:

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#Question id: 3623

#SCPH28 | Zoology

To carry out a complementation test, which of the following statement is correct?

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#Question id: 11203

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

Which of the following statements about action potentials is correct?

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#Question id: 753

#SCPH28 | Zoology

The renaturation of regions of complementarity between different nucleic acid strands is known as___________

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#Question id: 27732

#Research Methodology

Amongst which of the following is / are not a major data analysis approach?