posted by mysterychicken .
9. A molecule shaped like a spiral staircase (double helix) is a typical of
a. deoxyribonucleic acid
b. ribonucleic acid
d. both a and b
14. Surface area is an important factor in limiting growth cell because
a. the cell may become too large to remove enough wastes.
b. materials can't enter the cell if it's too large
c. the cell can burst if the membrane becomes too large
d. waste products can't leave the cell if it's too small
I'm stuck between A and D
9) A molecule shaped like a spiral staircase is typical of A. deoxyribonucleic acid.
And I think number 14 is C but im not for sure.