Most organic compounds contain carbon and _______.
- nitrogen
- hydrogen
- oxygen
- phosphorous
hydrogen
The large diversity of shapes of biological molecules is possible because of the extensive presence of oxygen in the molecules.
- True
- False
False
Ex.
The large diversity of shapes of biological molecules is possible because of the extensive presence of carbon in the molecules.
C3H8 is an example of a hydrocarbon.
- True
- False
True
Ex.
Hydrocarbons consist of carbon and hydrogen.
Molecules that have the same chemical formula (same numbers of each atom) but different three-dimensional shapes are called _____.
- isotopes
- isomers
- enantiomers
- functional groups
isomers
Ex.
Isomers are compounds that have the same molecular formula but different structures and therefore different properties. Three types of isomers are structural isomers, cis-trans isomers, and enantiomers.
What functional group is commonly used in cells to transfer energy from one organic molecule to another?
- amino
- carboxyl
- hydroxyl
- phosphate
phosphate