BIO 1300
BIO1300 Exam II Questions and Answers
Updated 2026
Fluid Mosaic Model
Model That Describes The Arrangement And Movement Of The Molecules That Make Up
A Cell Membrane
Glycoproteins
Membrane Carbohydrates That Are Covalently Bonded To Proteins.
Glycolipids
Membrane Carbohydrates That Are Covalently Bonded To Lipids.
Role Of Cholesterol In Membrane
-Disrupts The Regular Packing Fo The Hydrocarbon Tails Of Phospholipid Molecules, So
Prevents Them From Crystallizing And Behaving As A Solid.
-However It Also Restricts Molecular Motion And Therefore The Fluidity Of The
Membrane.
-It Also Reduces The Permeability To Hydrophilic Particles Such As Sodium Ions And
Hydrogen Ions.
-Due To Its Shape It Can Help Membranes To Curve Into A Concave Shape, Which Helps
In The Formation Of Vesicles During Endocytosis.
Integral Proteins
Penetrate The Hydrophobic Interior Of The Lipid Bilayer
Peripheral Proteins
The Proteins Of A Membrane That Are Not Embedded In The Lipid Bilayer; They Are
Appendages Loosely Bound To The Surface Of The Membrane.
Is It More Likely For Phospholipids To Move Laterally Of Flip Transversely Across Pm?
Move Laterally
As Temps Cool, Membranes Switch From A ___ State To A ___ State
BIO 1300
,BIO 1300
Fluid To A Solid State
The Temp At Which A Membrane Solidifies Depends On
Types Of Lipids And Steroid Cholesterol In Pm
At Moderate Temps, Cholesterol ________________________ Membrane Fluidity
Reduces
At Low Temps, Cholesterol Can _______________Solidification Of Pm
Prevent
Viscous
Saturated Pm
Fluid
Unsaturated Pm
Membranes Rich In Unsaturated Fatty Acids Are
More Fluid Than Those Rich In Saturated Fatty Acids
Fluid Cell Membrane
Unsaturated Hydrocarbon Tails
Proteins
Determine Most Of The Membranes Specific Functions
Major Functions Of Membrane Proteins
Transport
Enzymatic Activity
Signal Transduction
Cell-Cell Recognition
Intercellular Joining
Attachment To The Cytoskeleton And Extracellular Matrix (Ecm)
What Can Pass Through The Cell Membrane Easiest? Co2, H2o, Sugar, Na+?
Co2
BIO 1300
, BIO 1300
Diffusion And Osmosis
Two Types Of Passive Transport
Active Transport
Energy-Requiring Process That Moves Material Across A Cell Membrane Against A
Concentration Difference
Diffusion
Movement Of Molecules From An Area Of Higher Concentration To An Area Of Lower
Concentration.
Osmosis
Diffusion Of Water Through A Selectively Permeable Membrane
Isotonic Solution
A Solution In Which The Concentration Of Solutes Is Essentially Equal To That Of The Cell
Which Resides In The Solution
Hypotonic Solution
A Solution In Which The Concentration Of Solutes Is Less Than That Of The Cell That
Resides In The Solution
Hypertonic Solution
A Solution In Which The Concentration Of Solutes Is Greater Than That Of The Cell That
Resides In The Solution
Tonicity
The Ability Of A Surrounding Solution To Cause A Cell To Gain Or Lose Water
Plant Cells Wants To Be In A ________________ Or Turgid State
Hypotonic
Animal Cells Want To Be In A(N) ____________State
Isotonic (Flaccid)
When Cells Are In A Hypertonic State, They Become ____________________
BIO 1300
BIO1300 Exam II Questions and Answers
Updated 2026
Fluid Mosaic Model
Model That Describes The Arrangement And Movement Of The Molecules That Make Up
A Cell Membrane
Glycoproteins
Membrane Carbohydrates That Are Covalently Bonded To Proteins.
Glycolipids
Membrane Carbohydrates That Are Covalently Bonded To Lipids.
Role Of Cholesterol In Membrane
-Disrupts The Regular Packing Fo The Hydrocarbon Tails Of Phospholipid Molecules, So
Prevents Them From Crystallizing And Behaving As A Solid.
-However It Also Restricts Molecular Motion And Therefore The Fluidity Of The
Membrane.
-It Also Reduces The Permeability To Hydrophilic Particles Such As Sodium Ions And
Hydrogen Ions.
-Due To Its Shape It Can Help Membranes To Curve Into A Concave Shape, Which Helps
In The Formation Of Vesicles During Endocytosis.
Integral Proteins
Penetrate The Hydrophobic Interior Of The Lipid Bilayer
Peripheral Proteins
The Proteins Of A Membrane That Are Not Embedded In The Lipid Bilayer; They Are
Appendages Loosely Bound To The Surface Of The Membrane.
Is It More Likely For Phospholipids To Move Laterally Of Flip Transversely Across Pm?
Move Laterally
As Temps Cool, Membranes Switch From A ___ State To A ___ State
BIO 1300
,BIO 1300
Fluid To A Solid State
The Temp At Which A Membrane Solidifies Depends On
Types Of Lipids And Steroid Cholesterol In Pm
At Moderate Temps, Cholesterol ________________________ Membrane Fluidity
Reduces
At Low Temps, Cholesterol Can _______________Solidification Of Pm
Prevent
Viscous
Saturated Pm
Fluid
Unsaturated Pm
Membranes Rich In Unsaturated Fatty Acids Are
More Fluid Than Those Rich In Saturated Fatty Acids
Fluid Cell Membrane
Unsaturated Hydrocarbon Tails
Proteins
Determine Most Of The Membranes Specific Functions
Major Functions Of Membrane Proteins
Transport
Enzymatic Activity
Signal Transduction
Cell-Cell Recognition
Intercellular Joining
Attachment To The Cytoskeleton And Extracellular Matrix (Ecm)
What Can Pass Through The Cell Membrane Easiest? Co2, H2o, Sugar, Na+?
Co2
BIO 1300
, BIO 1300
Diffusion And Osmosis
Two Types Of Passive Transport
Active Transport
Energy-Requiring Process That Moves Material Across A Cell Membrane Against A
Concentration Difference
Diffusion
Movement Of Molecules From An Area Of Higher Concentration To An Area Of Lower
Concentration.
Osmosis
Diffusion Of Water Through A Selectively Permeable Membrane
Isotonic Solution
A Solution In Which The Concentration Of Solutes Is Essentially Equal To That Of The Cell
Which Resides In The Solution
Hypotonic Solution
A Solution In Which The Concentration Of Solutes Is Less Than That Of The Cell That
Resides In The Solution
Hypertonic Solution
A Solution In Which The Concentration Of Solutes Is Greater Than That Of The Cell That
Resides In The Solution
Tonicity
The Ability Of A Surrounding Solution To Cause A Cell To Gain Or Lose Water
Plant Cells Wants To Be In A ________________ Or Turgid State
Hypotonic
Animal Cells Want To Be In A(N) ____________State
Isotonic (Flaccid)
When Cells Are In A Hypertonic State, They Become ____________________
BIO 1300
