unit 2 condensed Flashcards
State if the following molecules are hydrophobic or hydrophilic: glucose, amino acids, cholesterol, fats, oxygen, and sodium chloride.
Outline the mechanism of transport in the blood of the following molecules: glucose, amino acids, cholesterol, fats, oxygen, and sodium chloride.
Explain three thermal properties of water that are useful to living organisms.
melitng/ boiling point: relative high for being made of such light elemnts due to hydrogen bonding.
high heat capacity: temp of large bodies of water remain relatively constant
density: bc of hydrogen bonding solid water (ice) floats is less dense than water so floats which acts like a blanket isulating the lving organisms in the lake.
Outline an example of the cohesive +adhesion property of water being of benefit to life.
cohesion: water surface tension helps insects such as water striders
adhesion: water in plant cell wall
List three examples of monosaccharides.
glucose, ribose (sugar of RNA nucleotides), deoxyribose (sugar of DNA nucleotides)
List three examples of disaccharides.
maltose (glucose x2), sucrose (glucose + fructose), lactose (glucose + galactose)
List three examples of polysaccharides.
starch, gloycogen, cellulose
Use molecular diagrams to draw the formation of maltose from two glucose monomers.
see notion
State two functions of triglycerides.
source of energy, storage of energy, thermal insulation, water proofing, protection
Outline the difference between fats and oils.
fats: solid at room temp, typically from animal source, contain more saturated fatty acids. ex butter and lard.
the reverse for oils, liquid, plant sources, unsaturated ex, olive oil.
Describe the differences between cis- and trans- fatty acids.
they are isomers.
trans have C-H bonds on opposite sides of the C =C bond
cis fats have them on the same side.
