CB3bi DNA Flashcards
The four bases in DNA: a________
adenine
The four bases in DNA: c_______
cytosine
The four bases in DNA: t_______
Thymine
The four bases in DNA: g______
Guanine
Each base is attached to a…
sugar
Each sugar is attached to a….
phosphate group
The sugar and phosphate groups form…
the backboneof DNA strands
DNA is made of units joined in a chain, and so it is a…
polymer
A molecule of DNA contains two strands, each of which form a ship called a helix. The strands are held together by substances called bases, to form a…
Double helix
Complementary base pairs
Two DNA bases that fit into each other and link by hydrogen bonds
Describe the shape of a DNA molecule
A DNA molecule is tgithly coiled and forms the shape of a double helix
Cytosine and guanine form how many hydrogen bonds between them?
3
A slightly negative charged part of one base attracts…
A slightly positively charged part of another base
Adenine and Thymine form how many hydrogen bonds?
2
The order of bases in a gene contains the
coded instructions for a protein