en el nucleo de un atomo, la relacion de neutrones es a protones como 7 es a 15. si el numero de masa es 110. cual es el numero atomico

The first means of speeding up reactions mentioned by the speaker is raising the enzymes 

There are four nitrogenous bases that make up dna. the two pyramidines are thymine and cytosine. the two purines are adenine and guanine. these bases pair in a very specific way. adenine - thymineguanine - cytosine i remember it like this: a tall, good cat.