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CMB1004 Biophysics Cell Biology Study Set Exam
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CMB1004 Biophysics Cell BiologyStudy Set Exam
What amphipathic molecules? - Answer Molecules that have both a polar and a non
polar region
In terms of water, what is a hydration shell of interaction? - Answer Water molecules will
surround the polar/charged molecules in a cage
Why is water good at dissolving charged/polar molecules? - Answer Water is dipolar, so
it can hydrogen bond with itself and other molecules
Why does water have an unusually high boiling point? - Answer It can hydrogen bond
with itself
What does solubility in water depend on? - Answer How polar the molecule is, more
polar is more soluble
What is the definition of 1 mole? - Answer 1 mole = 12g of carbon-12
How many particles are in a mole? - Answer 6.022x10^23
What is molar mass? - Answer Mr in g/mol
What is M- Molarity? - Answer Concentration mol/L
What is Brownian motion? - Answer Molecules will move randomly due to many
collisions with other molecules in a solution
What is the mean free path of molecules? - Answer time without any collisons
What is diffusion? - Answer Net flux of molecules down a concentration gradient due to
random thermal motion
Movement of molecules in a solution is - Answer Random
What is turgor pressure? - Answer Diffusion with the presence of barriers, biological
molecules are semi-permeable
What is osmolarity? - Answer The number of ions/molecules per unit volume
What is the difference between hypertonic, hypotonic and isoosmotic? - Answer
Hypertonic - Greater osmolarity outside cell
Hypotonic - Greater osmolarity inside cell
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