You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS.              

How many units of ß-galactiosidase would you expect to be expressed from deletion 1 in a gln2– mutant? 

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#Question id: 5407

#General Aptitude

The average age of husband, wife and their child 1 years ago was 23 years and that of wife and the child 2 years ago was 15 years. The present age of the husband (in years) is:

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#Question id: 7100

#Unit 5. Developmental Biology

If cells from the animal pole of a frog blastula (animal cap cells) are placed into contact with cells from the vegetal hemisphere, after removing the cells fated to form mesoderm, what is the result?

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#Question id: 6578

#General Aptitude

Find the term which does not fit into the series : 1CV, 5FU, 9IT , 15LS, 17OR

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#Question id: 23851

#Unit 13. Methods in Biology

DNA fragments from a gel are transferred to a nitrocellulose paper during the procedure called Southern blotting. What is the purpose of transferring the DNA from a gel to a nitrocellulose paper?

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#Question id: 10214

#Unit 6. System Physiology – Plant

LHCII, one of the membrane-bound antenna pigment proteins, which can be phosphorylated and non-phosphorylated by a specific kinase present in thylakoid membrane. Which of the following statements are NOT TRUE ?