<span>Two of the nitrogenous bases present in DNA (Guanine and Adenine) contain two rings and thus are much larger than the other two (Cytosine and Thymine), which have only one.
Nitrogenous bases with two rings (such as G and A) are known as PURINES, whereas nitrogenous bases with a single ring (such as C and T) are known as PYRIMIDINES.
A stable DNA structure is formed ONLY when the two strands are a constant distance
apart which ONLY happens when a PURINE (G or A) on one strand is paired with a PYRIMIDINE (C or T) on the other strand. The strands would have to move much further apart to permit a purine to pair with another purine and would have to move much closer together to permit a pyrimidine to pair with a pyrimidine.
(Source: https://www.amherst.edu/system/files/media/1536/ModGen_1C_TP.pdf )</span>
I would say that Science is the term for collected studies on the creation of all things and how time affects them.
carcinogenic diets
carcinogenic diets are foods that are carcinogenic in nature
and they are foods eaten on daily basis that could end up given a cancer. Carcinogenic
diets includes:
High dietary fat intake
High animal-food => low plant-food intake
Nitrosamines fm burnt & charred food
High intakes of pickled & fermented intake
Low level of antioxidants (esp. vita A&C)
Low fat & veg intake
Low intake of whole grains & fiber
Changes in temperature, salt concentration, ionic concentration, of pH levels
