Biology 7.00

Biology 7.00 MIT

Vitalism- the concept of 1800s era scientists that life had a magic property to it outside the laws of chemistry. Due to inability to reproduce fermentation chemically.
Buchner develops gentle mortar and pestle, combines with press to get yeast "juice" which is able to carry out fermentation. The substance responsible is called an ENZYME. Nobel prize 1907

Fractionating Life-

At the level of atomic composition you are hydrogen, 63%.
You are oxygen, 24%.
You are carbon, 10%.
You are nitrogen, 1.4%.
You are phosphorus, 0.2%.
You are sulfur, less than 0.1%.
That's most of you.
That's accounting for most of you.
And you are trace quantities, trace amounts, of ions--
calcium, chloride, potassium, sodium, magnesium, manganese, teeny, teeny,
weeny little bits of selenium.

Chem portion
A single covalent bond requires 80 kcal of energy to break. The thermal differences at room temp average .6.  There are of course double and triple bonds also.

KNOW THIS- bonds per atom
H 1
O 2
N 3(4)
C 4
P 5
S 6
Electronegativity
O and N

1 nucleotide of dna includes a base (a,c,g,or t) a triphosphate and a 5'(prime) sugar (the trinity)