Experimental studies reveal that double-stranded dna can exist in three different helical forms known as a, b, and z dna. why do molecular biologists primarily focus on b dna?

The correct answer is - B-DNA is the most common form of the DNA present in the cell and a good approximation of the structure of DNA in the cell.

Explanation:

The B- DNA is a form of the DNA that is explained by Watson and crick by the double-helical structure model. B-DNA is the predominant form of the DNA out of the three forms of the DNA which are B-DNA, Z-DNA, and A-DNA.

B-DNA is is provide a good approximation of the structure of DNA in a cell and its most common form of DNA in a cell that makes it the most studied and focused form of DNA.

Thus, the correct answer is -  B-DNA is the most common form of the DNA present in the cell and a good approximation of the structure of DNA in the cell.

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