B1.1.2 DNA Flashcards
1
Q
What is DNA?
A
DNA is a polymer made up of two long strands of small units that repeat throughout the structure, called nucleotides.
2
Q
What is a nucleotide?
A
A nucleotide is made up of a sugar, a phosphate and a base attached to the sugar.
3
Q
DNA Structure
A
The two long strands within each DNA molecule are held together by attractions between opposite bases.
Each base has one other specific base with which it pairs:
T pairs with A.
G pairs with C.
The sugar and phosphates of nucleotides form the long strands.
4
Q
What is a polymer?
A
Very large chain-like molecules that often extend for hundreds or thousands of atoms. The atoms in a polymer molecule are joined by strong covalent bonds.
5
Q
What is a base?
A
There are 4 forms of base - A, C, G, T
