The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because ofA. Non-recombinant bacteria containing betagalactosidaseB. Insertional inactivation of alphagalactosidase in non-recombinant bacteriaC. Insertional inactivation of alphagalactosidase in recombinant bacteriaD. Inactivation of glycosidase enzyme in recombinant bacteria

The colonies of recombinant bacteria appear white in contrast to blue

1.	The colonies of recombinant bacteria appear white in contrast to blue colonies of non-recombinant bacteria because ofA. Non-recombinant bacteria containing betagalactosidaseB. Insertional inactivation of alphagalactosidase in non-recombinant bacteriaC. Insertional inactivation of alphagalactosidase in recombinant bacteriaD. Inactivation of glycosidase enzyme in recombinant bacteria
Answer» Correct Answer - A Lac operon Z-gene produce beta galactosidase that convert X-gal chromogen into blue colour in non recombinant bacteria if this gene is affected by insertion inactivation this reaction does not take place and bacteria appears white. But this inactivation take place in beta-galactosidase gene not in `alpha`-galactosidase gene in recombinant bacteria so right answer is non recombinant bacteria containing beta galactosidase enzyme that cause blue colour colonies of bacteria.

Discussion

No Comment Found

Related InterviewSolutions

Restriction endonucleases are enzymes which:A. make cuts at specific positions within the DNA moleculeB. recognize a specific nucleotide sequence for binding of DNA ligaseC. restrict the action of the enzyme DNA polymeraseD. remove nucleotides from the ends of the DNA molecule
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops will be havingA. High stability and low resilienceB. Low stability and low resilienceC. High stability and high resilienceD. Low stability and high resilience
The correct sequence of spermatogenetic stages leading to the formation of sperms in a mature human testis isA. Spermatogonia-spermatid-spermatocyte- spermsB. Spermatocyte-spermatogonia-spermatid- spermsC. Spermatogonia-spermatocyte-spermatid- spermsD. Spermatid-spermatocyte-spermatogonia- sperms
Which of the following species contains three bond pair and one lone pair around the central atom ?A. `NH_(2)^(-)`B. `PCl_(3)`C. `H_(2)O`D. `BF_(3)`
Limiting molar conductivity of `NH_(4)OH` [i.e., `Lambda_(m)^(@)(NH_(4)OH)`] is equal to:A. `A_(m)^(@) (NH_(4)OH) +A_(m)^(@)(NH_(4)Cl)-A_(m)^(@)(HCl)`B. `A_(m)^(@) (NH_(4)Cl) +A_(m)^(@)(NHOH)-A_(m)^(@)(NaCl)`C. `A_(m)^(@)(NH_(4)Cl)+A_(m)^(@)(NaCl)-A_(m)^(@)(NaOH)`D. `A_(m)^(@)(NAOH)+A_(m)^(@)(NaCl)-A_(m)^(@)(NH_(4)Cl)`
The `-OH` group of an alcohol or of the `-COOH` group of a carboxylic acid can be replaced by `-Cl` usingA. Hypochlorous acidB. ChlorineC. Hydrochloric acidD. Phosphorous pentachloride
Which of the following orders of acid strength is correct?A. RCOOH gt ROH gt HOH gt HC `-=` CHB. RCOOH gt HOH gt ROH gt HC `-=` CHC. RCOOH gt HOH gt HC `-=` CH gt ROHD. RCOOH gt HC `-=` CH gt HOH gt ROH
The correct order of reactivity towards the electrophilic substitiution of the compounds aniline(I),benzene(II) and nitro-benzene(III) isA. III gt II gt IB. II gt III gt IC. I lt II gt IIID. I gt II gt III
Which one of the following compounds will be most readily dehydrated?A. B. C. D.
Among the following four compounds (a) Phenol (b) methyl phenol (c) metanitrophenol (d) paranitrophenol the acidity order is –A. `c gt d gt a gt b`B. `a gt d gt c gt b `C. `b gt a gt c gt d `D. `d gt c gt a gt b`

Discussion

No Comment Found

Related InterviewSolutions

Reply to Comment