Biology/additional Science The Components Of Life Biology Worksheets Page 19
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3319
STRUCTURE OF DNA
4
(a) Use words from the box to complete the
sentences. (3 marks)
carbon
chromosome
double
gene
triple
hydrogen
A DNA molecule consists of two coiled strands
that form a
helix.
The strands are held together by
bonds between
the bases.
A
is a section of a
DNA molecule that codes for a specific protein.
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