The locations of molecules a and b at the beginning of the experiment are shown. which statement best describes what was observed when the setup was examined 20 minutes later?
1. molecule a remained inside the artificial cell and molecule b remained outside. 2. only molecule a was found both inside and outside the artificial cell.
3. only molecule b was found both inside and outside the artificial cell.
4. both molecules a and b were found inside and outside the artificial cell.

3. Only molecule B was found both inside and outside the artificial cell.

Explanation:

-  Molecule A is smaller than molecule B.

-  Molecule B has an electrical charge.

-  They could be different sizes.

-  size of the molecule

-  One is a sugar or monosaccharide and the other is a starch or polysaccharide.

the index of refraction of the second medium is higher. i just took the test trust me !

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.