True

False

In a single nucleotide, the phosphate group is attached to the $5$ carbon of the sugar unit.

The $-$ OH group on the $3^{\text{'}}$ carbon of the sugar unit is the attachment site for the nitrogenous base.

The antiparallel arrangement of double$-$stranded DNA is due to the phosphate group being bonded to the $3^{\text{'}\text{'}}$ carbon on one strand and the $5^{\text{'}}$ carbon on the complementary strand. $$

$$

Complementary base pairing relies on the number of hydrogen bonds that each base can make.