Why xenobiotic compounds are considered ad recalciterants?

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#Question id: 1753

#XL - Q Biochemistry

In the germinal center, B-cells become memory cells under the influence of:

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#Question id: 5295

#XL - S Microbiology

A cross is made between an Hfr that is met+ thi+ pur+ and an F-that is met- thi- pur-. Interrupted mating studies show that met+ enters the recipient last, so met+ recombinants are selected on a medium containing supplements that satisfy only the pur and thi requirements.  These recombinants are tested for the presence of the thi+ and pur+ alleles. The following numbers of individuals are found for each genotype:

A) Gene Order	I	Thi Pur  Met
	II	Pur  Met  Thi
	III	Pur   Thi  Met
B) Distance between Pur and Thi	IV	15.4 map unit
	V	1.8 map unit

What is the following correct combination?

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#Question id: 5240

#XL - T Zoology

If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?

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#Question id: 15212

#XL - Q Biochemistry

Sieving effect that contributes to the separation of proteins according to their size, in techniques such as SDS–gel electrophoresis, the concentration of gel used

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#Question id: 12937

#XL - S Microbiology

Choose the incorrect statement about Yeast Artificial Chromosome vectors.