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


Practice MCAT Question - Q59

Purines are double-ringed nitrogenous bases, while pyrimidines are single-ringed bases. Which of the following must be true?

A.  In a double-stranded molecule of DNA, there will normally be an equal number of purines and pyrimidines.
B.  In a single-stranded molecule of RNA, there will normally be an equal number of purines and pyrimidines.
C.  In a double-stranded molecule of DNA, there will normally be twice as many pyrimidines as purines.
D.  In a single-stranded molecule of RNA, there will normally be twice as many pyrimidines as purines.


Check The Sidebar For Another Practice MCAT Question!! ----->