3. how many chromosomes does each cell in our bodies have?
4. where is dna kept in a cell? curharyotic cells
5. dna is composed of what 3 parts? ehosphate
deoxyribose and four nitrogenous bases
6. what are the 4 nitrogenous bases? adenine , guanine
cytosine and thymine
7. dna has what shape? double helix
8. how are dna's side structures of dna related (shape, composition)
to the 3 main parts?
0 two of the bases, adenine & quanine
have a double ring structure characteristic
of a type of chemical called a purine.
29. how are the sides of dna named?
10. how are the nitrogenous bases paired?
bonds with
bonds with
and