With respect to the DNA methylation mechanism in mammalian cells, which of the following statements, if any, is true? 

I. The principal role of the DNMT1 DNA methyltransferase is in de novo methylation. 

II. The DNMT3A and DNMT3B DNA methyltransferases require hemi-methylated DNA as a substrate and are responsible for methylating nascent DNA strands that are complementary to methylated parental DNA strands.

III. Active DNA demethylation means removal of methyl groups from a hemi-methylated DNA double helix. 

IV. DNA methylation is not essential in mammalian development.

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#Question id: 6553

#General Aptitude

A lucky man finds 6 pots of gold coins . He counts the coins in the first four pots to be 60,30,20, and 15 respectively . If there is a definite progression , what would be the numbers of coins in the next two pots?

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#Question id: 6554

#General Aptitude

if the sum of the next two terms of the series below is x , what is the value of log 2 x ? 2,-4,8,-16,32,-64,128,...... 

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#Question id: 6555

#General Aptitude

What is the next number of the sequence 24,30,33,39,51,....

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#Question id: 6556

#General Aptitude

Find the next number in the sequence 1.4 , 2.2 , 3.0 , 3.8 , .....

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#Question id: 6557

#General Aptitude

S , M , .... , W, T , F , S

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#Question id: 6558

#General Aptitude

What is the next term in the following sequence 5,7,11,13,17,19,23,29,...