The sides of the dna molecule, the rails of the ladder, are composed of
a. phosphates only.
b. nitrogenous bases only.
c. phosphates and sugars.
d. nitrogenous bases and sugars.

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

Hector is back from his morning run and is feeling light-headed because his energy is depleted which food item will provide him with a quick source of carbohydrates

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?