FreeMCATPrep Logo

Support us and cryptocurrency!
Try a browser that's faster, safer, ad-free, and earns you cryptocurrency for using it! W3Schools

More Than 475 Free MCAT Questions with Detailed Answers!

Click HERE for your Random Question from our MCAT Question A Day Archive

MCAT Question A Day - 7/7/13

Which substance produced in the skin can act to reduce the probability of skin cancer?

A.  Keratin
B.  Melanin
C.  Sebum