DNA strands are coiled in to a spiral shape called a ______________________________________________.

The strands of the DNA double helix are held together by _______________________________________.

The DNA molecule resembles a ____________________.Question 2Select one:a.spiral noodleb.twisted double helixc.a banjod.a grain of salte.None of the above

A spiral staircase like the one shown can be a model of the structure of a DNA molecule.In this model, what do the steps on the staircase represent?A.A series of amino acidsB.A series of phosphate partsC.Pairs of sugar partsD.Pairs of nitrogen bases

Fill in the Blank QuestionFill in the blank question.In , the DNA consists mainly of a ring of DNA and associated proteins. In , the DNA strand is wound up in a highly tight coil called a chromosome.

The double helix structure of DNA is like a twisted ladder that is held together by the "rungs". Each rung consists of:a single basea pair of bases linked togethera proteina pair of atoms linked together