MCAT Biology Practice EXAM WITH COMPLETE QUESTIONS AND CORRECT DETAILED SOLUTIONS ALL WITH RATIONALED LATEST THIS YEAR.pdf – A comprehensive and up-to-date practice resource designed for students preparing for the MCAT Biology section administered by the

the chemical reaction that breaks down all the major macro-molecules


Hydrolysis


What regions are poplar nonpolar in a membrane?


1)the phosphates are Polar, water lovin, hydro philic regions that face
the outside.
2) Nonpolar, hydro phobic carbon chain regions face the inside.

,What is the strongest type of INTER-molecular bonds?


Hydrogen bonds are the strongest intermolecular bonds....
diople-dipole bonds are weaker. . . Vander wall bonds are the
weakest.


Why is water a liquid at high temperatures?


Hydrogen bonding bonds the water molocules closer together.


What is an ampipathic molecule? give an Example.


A molecule with both hydrophobic and hydrophilic regions.
Example: PhoshpoLipid (Phospho=philic,lipid= phobic)

,What is a lipid?


A lipid is a biological molecule with low solubility in water.
Lipid means fat. Liposuction is fat removal.
Peptides are NOT lipids.

, What are the 6 major groups of lipids?


1) fatty acids...
the next 3 have a 3 carbon back bone:
2) Tri-glyceride
3) Phospholipids
4) Glycolipids
5) Steroids
6) Terpenes - A large class of organic compounds. examples: smelly
pine oils, beer hops aroma and vitamin A.