Question

Question 4.(60 secs Which of the following pair is mismatched? A. B-DNA: dehydrated B.Z-DNA:left-handed helix C.A-DNA: dehydrated D.Z-DNA: no major grooves E.B-DNA: right-handed helix

Answer 1

B- DNA : dehydrated is mismached

Because Many structural differences between B-DNA and A-DNA arise due to various cases in the capture device (Figure 27.5). In A-DNA, C-3 'is a non-planar (formerly endo C-3) formed by the other four atoms of the furanose ring. In B-DNA, C-2 emerges from the plane (in a form called the C-2'-end). C-3'-terminations in A-DNA lead to a deviation of 19 degrees from normal to helical from a pair of bases. Phosphates and other groups in helix A bind to fewer H2O molecules than B-DNA. Thus, dehydration supports type A