Biol 1610 Module 4 Test Questions and
All Correct Answers 2025-2026
Updated.
Lipids - Answer Building blocks of membranes
Shows distinct polarity
Saturated vs unsaturated
assemble in double layer - tails repel h20 while heads attract h20
Saturated Lipid - Answer Lacks double bonds
Causes straight structure that favors tight packing of phospholipids
Unsaturated Lipid - Answer One or more double bonds that have kinks in the phospholipids
and decreases tightness of packing
Membranes - Answer Formed by lipids to create membrane bilayers
Includes lipids + proteins and is composed of many different structures (sugars, lipids, proteins)
moves a lot
Encloses cell and organelles to allow for cellular reacitons
Monomers is to Polymers - Answer As lipids is to membranes
Membrane Proteins - Answer Can extend across the membrane (integral membrane
proteins, includes transmembranes that span the entirety of the membrane.)
Can bind to the outside of the membrane (peripheral membrane proteins which are temporarily
associated with either internal or external side of membrane)
Biogenesis of Integral Membrane Proteins - Answer How proteins come to be located in
membranes
Lipid Bilayers - Answer form barriers between compartments
causes inside of cell to be diff than the outside
, Controls movement in/out of cell
Cells release ____ - Answer waste
What do membranes inside of the cell do? - Answer Divide cell into compartments that have
special functions
Bilayer - Answer bilayer behavior and the structure helps explain why membranes are self-
healing
two-layered structure of cell membrane with hydrophilic heads pointing toward the aqueous
environment and hydrophobic tails pointing away from aqueous environment
Structure of Cell Membranes - Answer cells defined by membranes
membranes separate cells from external environment
lipids are main component of cell membranes, along with proteins and carbs
Carbs in cell membrane structure - Answer usually attached to lipids or proteins
lipids called glycolipids
proteins called glycoproteins
Lipid component of cell membrane - Answer main component
properties of lipids able to form barrier in watery environment
Cell membranes have two layers of lipids - Answer phospholipids are the usual type
Phospholipids - Answer usually has glycerol backbone which is attached to phosphate group
(head) and then has a fatty acid tail composed of 2 fatty acids.
Phosphate group (on phospholipid) - Answer Head of the molecule
is hydrophilic (water loving)
polar
able to form hydrogen bonds with h20
All Correct Answers 2025-2026
Updated.
Lipids - Answer Building blocks of membranes
Shows distinct polarity
Saturated vs unsaturated
assemble in double layer - tails repel h20 while heads attract h20
Saturated Lipid - Answer Lacks double bonds
Causes straight structure that favors tight packing of phospholipids
Unsaturated Lipid - Answer One or more double bonds that have kinks in the phospholipids
and decreases tightness of packing
Membranes - Answer Formed by lipids to create membrane bilayers
Includes lipids + proteins and is composed of many different structures (sugars, lipids, proteins)
moves a lot
Encloses cell and organelles to allow for cellular reacitons
Monomers is to Polymers - Answer As lipids is to membranes
Membrane Proteins - Answer Can extend across the membrane (integral membrane
proteins, includes transmembranes that span the entirety of the membrane.)
Can bind to the outside of the membrane (peripheral membrane proteins which are temporarily
associated with either internal or external side of membrane)
Biogenesis of Integral Membrane Proteins - Answer How proteins come to be located in
membranes
Lipid Bilayers - Answer form barriers between compartments
causes inside of cell to be diff than the outside
, Controls movement in/out of cell
Cells release ____ - Answer waste
What do membranes inside of the cell do? - Answer Divide cell into compartments that have
special functions
Bilayer - Answer bilayer behavior and the structure helps explain why membranes are self-
healing
two-layered structure of cell membrane with hydrophilic heads pointing toward the aqueous
environment and hydrophobic tails pointing away from aqueous environment
Structure of Cell Membranes - Answer cells defined by membranes
membranes separate cells from external environment
lipids are main component of cell membranes, along with proteins and carbs
Carbs in cell membrane structure - Answer usually attached to lipids or proteins
lipids called glycolipids
proteins called glycoproteins
Lipid component of cell membrane - Answer main component
properties of lipids able to form barrier in watery environment
Cell membranes have two layers of lipids - Answer phospholipids are the usual type
Phospholipids - Answer usually has glycerol backbone which is attached to phosphate group
(head) and then has a fatty acid tail composed of 2 fatty acids.
Phosphate group (on phospholipid) - Answer Head of the molecule
is hydrophilic (water loving)
polar
able to form hydrogen bonds with h20
