An element is to a ____ as an organ is to a ____

An element is to a ____ as an organ is to a ____
a. atom; organism <--pretty sure this one's wrong
b. compound; organism <--not all organisms have organs
c. molecule; cell i think this one's right, but i'm not sure
d. atom; cell marked wrong
e. compound; organelle <--pretty sure this one's wrong

The bonds that are broken when water vaporizes are
a. ionic bonds
b. bonds between water molecules
c. bonds between atoms within individual water molecules
d. polar covalent bonds <--marked wrong
e. nonpolar covalent bonds

i'm pretty sure it's c or d

Which functional group is most likely to be responsible for an organic molecule behaving as a base?
a. hydroxyl
b. carbonyl
c. carboxyl
d. amino <--marked wrong but i'm almost 100% sure it's this!
e. phosphate

Choose the pair of terms that correctly completes this sentence:
Nucleotides are to ____ as ____ are to proteins
a. nucleic acids; amino acids
b. amino acids; polypeptides
c. glycosidic linkages; polypeptide linkages
d. genes; enzymes
e. polymers; polypeptides marked wrong

Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
a. The two strands of the double helix would separate
b. The phosphodiester bonds between deoxyribose sugars would be broken marked wrong
c. the purines would be separated from the deoxyribose sugars
d. the pyrimidines would be separated from the deoxyribose sugars
e. All bases would be separated from the deoxyribose sugars


if you could help me with just 1 of them, i'd be very grateful