Problem :
What three structures compose a nucleotide?
A nucleotide is composed of a five-carbon sugar, nitrogen base, and one or more
phosphate
groups.
Problem :
What is the name of the type of bond that occurs between a phosphate and ribose
group? Between a ribose and nitrogen base group?
An ester bond forms between a phosphate group and a ribose group. A glycosidic
bond forms
between a ribose group and a nitrogen base group.
Problem :
Name the bond that forms between nucleotide groups.
A phosphodiester bond forms between nucleotides to form nucleic acids.
Problem :
Explain the significance of hydrogen bonds in DNA helices.
While hydrogen bonds do contribute a small amount to the stability of helices,
their main
contribution is to the specificity of a helix. Hydrogen bonds dictate the
complementary base
pairing that aligns anti-parallel nucleic acids strands in a DNA helix.
Problem :
What does Chargaff's rule say?
Chargaff's rule states that the molar ratios of A to T and G to C bases are
approximately equal in
a DNA helix. This is a result of complementary base pairing between single
strands of DNA in a
helix. Each A pairs with a T and each G pairs with a C, making their molar
ratios equal.
