The Four Nitrogenous Bases of DNA + Other Structural DNA Stuff
thymine
This nitrogeneous base only bonds with adenine.
guanine
This nitrogenous base only bonds with cytosine.
cytosine
This nitrogenous base only bonds with guanine.
adenine
This nitrogenous base only bonds with thymine.
AT GC (GC could stand for a certain college or university, such as Galveston College or even Garret College if you so please.)
And a way to remember which nitrogeneous base bonds with which.
ladder
First of all, just to get this straight, just so we're on the same page here - DNA is like a __.
sugar-phosphate molecules
Now, the outside of this so-called DNA "ladder" is made of __ - __ __.
deoxyribose
OK, so each sugar-phosphate molecule consists of a sugar called __, hence the name DEOXYRIBOnucleic acid, and a phosphate group. (This one's a little harder.)
adenine
The first (1st) of the four (4) nitrogeneous bases that make up DNA. It's also first in alphabetical order.
thymine
The last (last) of the four (4) nitrogenous bases. It's fourth in alphabetical order.
nitrogen bases
The rungs of the ladder are made up of other molecules called __ __.
cytosine
The second (2nd) of the four (4) nitrogenous bases that make up DNA. This one's second in alphabetical order.
guanine
The third (3rd) of the four (4) nitrogenous bases that make up DNA. It's third in alphabetical order. I hope you can tell by now that I have listed the four nitrogenous bases in ALPHABETICAL ORDER.