BIOL 304 EXAM 5 | QUESTIONS AND
ANSWERS | 2026 UPDATE | WITH
COMPLETE SOLUTIONS
halogens add to lipids - ANSWER>double bonds add halogen with each double bond consuming one mole of
halogen. the average number of double bonds can then be concluded from the halogen consumption. so if you
have a molecule with unknown amount of double bonds and add halogens, if two are added then you know you
have two double bonds
what is the iodine value - ANSWER>a measure for the average number of double bonds of a fat or oil. it is the mass
of iodine in grams that is consumed by 100 grams of unsaturated liipds
iodine value equation - ANSWER>mass(I2)*100/mass(acylglycerol)= xMW(I2)*100/MWacylglycerol
what is x in the iodine value equation - ANSWER>the number of double bonds
what are biological properties of lipids - ANSWER>they are sources of energy. triglycerides are the main energy
storage form in animal tissues
, where are lipids stored in animals - ANSWER>adipose tissue
what do lipids do in cells - ANSWER>they are the major constituents of cell membranes; phospholipids are used to
build the cell membrane, the plasma membrane around a cell provides a barrier that separates the contents of a
cell from the external world
how do lipids function in cell communication - ANSWER>steroids are a group of lipids involved in cellular
communication
membrane fluidity and lipids - ANSWER>cholesterol acts as fluidity buffer. the cholesterol allows the cell membrane
to stay fluid when temperature drops. when temperature rises, it keeps the cell from becoming too fluid
how do lipids function in membrane fluidity - ANSWER>hydrophobic tail is attracted to the hydrophobic tails of the
phospholipids and hydrophilic head is attracted to the phosphate heads on the periphery of the membrane
fluidity of saturated vs unsaturated fatty acids - ANSWER>unsaturated fatty acids are more fluid than saturated
fatty acids
ANSWERS | 2026 UPDATE | WITH
COMPLETE SOLUTIONS
halogens add to lipids - ANSWER>double bonds add halogen with each double bond consuming one mole of
halogen. the average number of double bonds can then be concluded from the halogen consumption. so if you
have a molecule with unknown amount of double bonds and add halogens, if two are added then you know you
have two double bonds
what is the iodine value - ANSWER>a measure for the average number of double bonds of a fat or oil. it is the mass
of iodine in grams that is consumed by 100 grams of unsaturated liipds
iodine value equation - ANSWER>mass(I2)*100/mass(acylglycerol)= xMW(I2)*100/MWacylglycerol
what is x in the iodine value equation - ANSWER>the number of double bonds
what are biological properties of lipids - ANSWER>they are sources of energy. triglycerides are the main energy
storage form in animal tissues
, where are lipids stored in animals - ANSWER>adipose tissue
what do lipids do in cells - ANSWER>they are the major constituents of cell membranes; phospholipids are used to
build the cell membrane, the plasma membrane around a cell provides a barrier that separates the contents of a
cell from the external world
how do lipids function in cell communication - ANSWER>steroids are a group of lipids involved in cellular
communication
membrane fluidity and lipids - ANSWER>cholesterol acts as fluidity buffer. the cholesterol allows the cell membrane
to stay fluid when temperature drops. when temperature rises, it keeps the cell from becoming too fluid
how do lipids function in membrane fluidity - ANSWER>hydrophobic tail is attracted to the hydrophobic tails of the
phospholipids and hydrophilic head is attracted to the phosphate heads on the periphery of the membrane
fluidity of saturated vs unsaturated fatty acids - ANSWER>unsaturated fatty acids are more fluid than saturated
fatty acids
