Chemistry Of Life Flashcards
Proton mass?
1
Neuton mass?
1 unit
Electrical charge of proton
1
Neutron electrical charge
Neutral
Does an electron have a mass
No
Electric charge of electron
-1
Atomic weight of hydrogen
1
Atomic weight of oxygen
16
Atomic number of Oxy
8
Sodium atomic weight
23
Atomic number sodium
11
Maximum number of electrons in the outter shell?
32
Are isotopes stable or unstable ?
Unstable
Why: extra neutron in nucleus
Revision: covalent bonds are shared when they shore the same electrons
Ionic bonds are weaker
Water is a covalent bond
Electrolytes are _____ compounds
Ionic
Blood ph is kept at?
7.35 - 7.45
What do body buffers do?
Compensate for most PH fluctuations
Acidosis and alkalosis is very dangerous to what 2 systems ??
Cardiovascular
Nervous
Carbohydrates ratio ?
1:1:2
Single unit of sugar is what?
Monosacharaides
Disaccharides
Polysaccharides
Monosaccharides
What are 2 sugar units called ?
Monosacharaides
Disaccharides
Polysaccharides
Disaccharides
Thousands of sugar units called?
Monosacharaides
Disaccharides
Polysaccharides
Polysaccharides
When 2 sugar molecules combine to make a BIGGER sugar molecule a water molecule is what? Absorbed or expelled
And this forms a bond called ________
1) Expelled
2) glycosidic linkage
Revision»_space;
Sugar function
> > Provide a source of energy (cell metabolism)
> > Energy storage
> > Integral part of structure of DNA&RNA
> > ACTING as receptors on cell surface
