UNIT 1 Flashcards
How does water’s polarity result in cohesion and
adhesion through hydrogen bond interactions?
the uneven distribution of electrons within the molecule creates creates a slightly positive charge on the hydrogen atoms and a slightly negative charge on the oxygen atom allowing water molecules to form hydrogen bonds through adhesion and cohesion.
Why is ice less dense than water
the hydrogen bonds are able to form more causing the water molecules to expand which lowers the density
why does water have a high specific heat
It takes a lot of heat to break the hydrogen bonds and when hydrogen bonds form heat is released.Also on the other hand it takes energy to form hydrogen bonds.
hydrophilic
molecules that have an affinity (natural attraction) to water
having polar bonds makes molecules hydrophilic
hydrophobic
molecules that do NOT have an affinity (natural attraction) to water.
having no polar bonds makes molecules hydrophobic
What makes water a versatile solvent
it is polar and adhesive so it works with other polar molecules and adhesion allows water to attract other molecules
Why does water allow capillary action to happen
Walls of roots pull up the water molecules due to adhesion. Once Pulled up the rest of the molecules are also pulled up like a chain due to cohesion.
Elements in Carbohydrates
Always contains carbon
what are the 4 main properties of water?
-ice is less dense than water
-water has a high specific heat
-water is a versatile solvent
-capillary action
Elements in Lipids
Always contains carbon, can contains phosphorus
Elements in Proteins
Always contains carbon, always contains nitrogen, generally contains sulfur
Elements in Nucleic Acids
Always contains carbon, could contains phosphorus, always contains nitrogen
Monomer and Polymer for Carbohydrates
Monomer - Monosaccharide
Polymer - polysaccharides
Monomer and Polymer for Proteins
Monomer - Amino Acids
Polymer - Polypeptides
hydrolysis
breaks covalent bonds in polymers to form monomers
what is glycosidic linkage
It is a covalent bond Carbohydrate monomers
dehydration synthesis
forms covalent bonds between monomers to form polymers
4 organic compounds
-Carbohydrates
-Proteins
-Lipids
-Nucleic Acids
What is a peptide bond
Covalent bond between protein monomers
What is an ester linkage
covalent bond between lipids