### molecule:

Nutrient molecule
* Most nutrient molecules can traverse the outer membrane without requiring energy.
* can pass through the tegument to the developing cercariae.
* pass from cells on the surface of a villus into blood vessels.
* supply the fuel for our metabolic processes.

### molecule:

Organic molecule
* All organic molecules have a carbon skeleton that is composed of rings or chains of carbons.
* Many organic molecules bind to their protein receptors with only moderate affinity
  - have chains of carbon atoms
* Most organic molecules have high absorption in the ultra-violet range.
* Some organic molecules contain triple covalent bonds.
* are high energy configurations of carbon, hydrogen, and oxygen atoms
  - immensely complex
  - made up of monomers
  - organic compounds
  - simply molecules that contain carbon
  - substances where carbon is the basic structural component of the molecule
* are the basic building blocks of living organisms on earth
  - necessary building blocks for the evolution of life
* can be chiral if they contain one or more chiral centers
  - have a higher level of complexity compared to inorganic compounds
* contain both carbon and hydrogen.
* guide crystal growth.
* have an unparalleled ability to seek out and latch onto particular partners.
* is the final a. the final electron acceptor is electron acceptor
* pass along the food chain by consumers.
* range in size form relatively small to very large.
+ Organic synthesis: Chemical synthesis :: Organic chemistry
  * Organic synthesis' is a special part of chemical synthesis. It builds organic compounds using organic reactions. Organic molecules can have a higher level of complexity compared to inorganic compounds. So, the synthesis of organic compounds has developed into one of the most important parts of organic chemistry.
+ Origin of life, History of studies into the origin of life, Haldane and Oparin: Evolutionary biology :: Molecular biology :: Prokaryotes :: Earth sciences
  * No real progress was made until 1924 when Alexander Oparin reasoned that atmospheric oxygen prevented the synthesis of the organic molecules. Organic molecules are the necessary building blocks for the evolution of life. The Origin of Life', Weidenfeld and Nicolson, London, pages 199-234.Oparin A.I. 1952. The Origin of Life. These would combine in ever-more complex fashions until they formed droplets. Many modern theories of the origin of life still take Oparin's ideas as a starting point.

### molecule:

Protein molecule
* All protein molecules consist of very long chains of simple components called amino acids
  - function by binding specifically to other molecules
  - undergo a physical rearrangement to give a secondary structure
* Every protein molecule has a characteristic three-dimensional shape, or conformation
  - the property of making transitions from one structure to another
  - is composed of amino acids
* are among the primary effectors of physiological and biochemical processes
  - brilliant enzymes but lousy replicators
  - embedded in the lipid bilayer
  - made up of different combinations of amino acids
  - peptides
  - polypeptide
  - proteins
  - sensitive to heat
* are the carriers of enzyme action
  - effectors of all biological function
  - expressions of a gene
  - too large to be filtered out of the blood into the urine
* consist of long chains of building blocks called amino acids.
* contain acidic and basic groups.
* have three-dimensional folded shapes.

Real molecule
* do have volume and do attract each other.
* jiggle around their minimal-energy shapes due to thermal vibrations.

Saccharide
* are water-soluble and have structural diversity owing to their numerous hydroxyl groups.
* is an organic compound