The trophoblast forms to the

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#Question id: 15637

#SCPH01 Biochemistry

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: 15559

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

The majority of the antibiotics have been isolated from 

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#Question id: 18665

#SCPH01 Biochemistry

In a road accident a forensic scientist collected traces of blood or other biological fluids and he wants to compared samples according to the composition of certain isoenzymes, for this which technique will efficiently work

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#Question id: 18889

#SCPH01 Biochemistry

In light microscopy, which of the following is used as fixatives prior to staining technique?

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#Question id: 10385

#SCPH05 I Biotechnology

The leaves of many species are able to bend toward the sun during its progress across the sky, a phenomenon known as