Biological

The building blocks of lipids are fatty acids and glycerol. All lipids have a hydrophobic tail region and a hydrophilic head
Saturated fat has all the hydrogen it can hold attached to it,unsaturated fat does not
Phospholipids are a type of lipid that has a phosphate group attached, they are important in living systems because they help form cell membranes as a lipid bi-layer
The buildingblocks of proteins are amino acids. A polypeptide is a long chain of amino acids linked together
Primary: sequence of amino acids, secondary: hydrogen bonding between amino acids (2 most common patternsalpha helix and pleated sheet), tertiary: folding and bending of the secondary structure (due to bonds such as hydrogen bonds or covalent sulfur-sulfur bonds), quaternary: when two or more polypeptidechains are held together by bonds between the amino acids on the different chains (e.g. hemoglobin)
The building blocks of nucleic acids are phosphate groups, sugar and a nitrogenous base. Thedifference between DNA and RNA is RNA is a single strand with a ribose sugar and Uralic instead of thymine
CH. 3

Prokaryotic cells do not have a true nucleolus and organelles while eukaryotic cells doAs size gets smaller surface area goes up while volume goes down. This is important to cells because more surface area makes it easier for diffusion and osmosis to occur
The endosymbiosis theory isthat chloroplasts and mitochondria where once free living bacteria but when swallowed by other cells they were not digested and created an advantageous symbiosis
The plasma membrane is made up of aphospholipid bi-layer. It is semi-permeable because it allows certain things to pass through the membrane and keeps other things out. The proteins of the plasma serve the function of acting as porins.Porins are channels control the transport of substances in and out of the cell, imparting the membrane its property of semipermeabililty.
The animal cell has no cell wall and no chloroplasts. Also...