Select all of the following conclusions that Watson and Crick used to devise their structural and chemical model of DNA.
A always pairs with T, and
C always pairs with G.
A always pairs with G,
and C always pairs with T.
Each nucleotide contains
a phosphate group at the
3' end of the sugar.
Each nucleotide contains
a phosphate group at the
5' end of the sugar.
Bases are attached to
backbone and face
outwards away from each
other.
DNA is a single-stranded
molecule.
Bases are attached to
backbone and face
inwards towards each
other.
The backbone is made up
of ribose sugar and
nitrogen bases.
DNA is antiparallel,
meaning the strands are
oriented in opposite
directions.
DNA is antiparallel,
meaning the strands are
oriented in the same
direction as each other.
DNA is a double helix.
The backbone is made up
of deoxyribose sugar and
phosphate groups.