Indicate which of the following statements are true regarding the DNA structure. (Select all that apply)

a. The nitrogenous bases face the inside and hold the two backbones together with hydrogen bonds.
b. Across from the purine on one side, there is another purine on the other.
c. Each sidepiece is a sugar-phosphate backbone composed of phosphate groups alternating with the sugar deoxyribose.


a. The nitrogenous bases face the inside and hold the two backbones together with hydrogen bonds.
c. Each sidepiece is a sugar-phosphate backbone composed of phosphate groups alternating with the sugar deoxyribose.

Biology & Microbiology

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Henry has the sickle-cell trait. Why might it be a bad idea for him to go on that hiking vacation that is being planned for the high Andes?

What will be an ideal response?

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Indicate whether the statement is true or false

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Betadine belongs to what group of chemical control agents?

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