Here are the answers to your statements:
-
Complementary base pairing relies on the number of hydrogen bonds that each base can make. - True
(Complementary base pairing in DNA occurs between adenine and thymine (2 hydrogen bonds) and between guanine and cytosine (3 hydrogen bonds).) -
The phosphate attached to the 5' carbon of a given nucleotide links to the 3' -OH of the adjacent nucleotide. - True
(In a DNA or RNA strand, the phosphate group at the 5' carbon of one nucleotide bonds to the 3' -OH group of the next nucleotide, creating a sugar-phosphate backbone.) -
The -OH group on the 3' carbon of the sugar unit is the attachment site for the nitrogenous base. - False
(The nitrogenous base is attached to the 1' carbon of the sugar unit, not the 3' carbon.) -
The antiparallel arrangement of double-stranded DNA is due to the phosphate group being bonded to the 3' carbon on one strand and the 5' carbon on the complementary strand. - True
(In double-stranded DNA, one strand runs in the 5' to 3' direction while the complementary strand runs in the 3' to 5' direction, making them antiparallel.) -
In a single nucleotide, the phosphate group is attached to the 5' carbon of the sugar unit. - True
(In a nucleotide, the phosphate group is indeed attached to the 5' carbon of the ribose or deoxyribose sugar.)
So the responses to each statement are: True, True, False, True, True.
1 answer