The DNA will be 10 nm long and highly stable due to tight packing of A–T base pairs forming three hydrogen bonds per pair.

The number of base pairs does not affect DNA length, but fewer G–C bonds will increase the distance between the strands, making it longer than 34 nm.

The DNA molecule will complete 10 helical turns and measure approximately 34 nm in length; the A–T enrichment will make it more stable due to fewer hydrogen bonds.

The total length of the molecule will be 100 nm; however, instability will arise because of the directionality mismatch from excessive A–T content.

The DNA molecule will be 34 nm long with 10 helical turns; however, the dominance of A–T base pairs (with only 2 hydrogen bonds) will reduce its thermal stability.

Because the base spacing is 3.4 nm per pair, the total DNA length will be 340 nm and highly unstable due to sugar-phosphate backbone misalignment.