MCQ
Length of one loop of B DNA is:
- A3.4nm
- B0.34nm
- C20nm
- D10nm
Explanation:
In B-DNA, the most common double helical structure, the double helix is right-handed with about 1010.5 nucleotides per turn.The double helix structure of DNA contains a major groove and minor groove, the major groove being wider than the minor groove. The length of one loop of B-DNA is 3.4nm.
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| column $I$ | column $II$ |
| $A.$ $ICSI$ | $I$ Artificially introduction of semen into the vagina or uterus. |
| $B.$ $IUI$ | $II$ Transfer of ovum collected from a donor into the fallopian tube where fertilization occur |
| $C.$ $IUT$ | $III$ Formation of embryo by directly injecting sperm into the |
| $D.$ $GIFT$ | $IV$ Transfer of the zygote or early embryo (with upto $8$ blastomeres) into a fallopian tube. |
| $E.$ $ZIFT$ | $V$ Transfer of embryo with more than $8$ blastomeres into the uterus |