A pull down affinity chromatography assay is used for the investigation of

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#Question id: 2190

#Unit 2. Cellular Organization

Membrane carbohydrates occur as:

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#Question id: 28420

#Unit 5. Developmental Biology

Which of the following cell is involved to shedding of most of the deep cells during chick development?

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#Question id: 11882

#General Aptitude

Three numbers are in the ratio 1 : 2 : 3 and their HCF is 12. The numbers are

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#Question id: 15658

#Unit 13. Methods in Biology

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: 4445

#Unit 3. Fundamental Processes

The active site, which is made up of RPB1 and RPB2, from both these subunits, is found at the base of the pincers within a region called the “active center cleft” . The active site works according to the two-metal ion catalytic mechanism for nucleotide addition proposed for all types of polymerase;