

IB Term 3 Grade 10 DPP Biology
Flashcard
•
Biology
•
10th Grade
•
Hard
Maya Dalton
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88 questions
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1.
FLASHCARD QUESTION
Front
Plasma
Back
Topic 1
2.
FLASHCARD QUESTION
Front
solution
Back
solute+solvent
3.
FLASHCARD QUESTION
Front
Dissolving substances
Back
Water is slightly polar, and when a non-polar item is added, it can pull apart it.
4.
FLASHCARD QUESTION
Front
Plasma Membrane
Back
The plasma membrane is a phospholipid bilayer that controls substance movement in and out of the cell.
All cells have a plasma membrane.
It is selectively (or differentially) permeable.
Most eukaryotic organelles also have membranes.
5.
FLASHCARD QUESTION
Front
Phospholipid
Back
Phosphate head is hydrophilic (water-attracting).
Fatty acid tails are hydrophobic (water-repelling).
The bilayer creates a hydrophobic barrier:
Non-polar substances pass through easily.
Polar substances cannot pass easily.
6.
FLASHCARD QUESTION
Front
Function of Phospholipid Bilayer
Back
Selectively control entry and exit of molecules.
Sites of chemical reactions.
Create compartments in the cell.
Restrict movement between cell regions.
Contain protein receptors for communication.
Involved in cell-cell recognition.
7.
FLASHCARD QUESTION
Front
Fluid Mosaic Model
Back
Fluid Mosaic Model
Also known as Singer-Nicolson Model.
Integral proteins: penetrate bilayer; function as channels/pumps.
Peripheral proteins: surface of membrane; involved in recognition/receptors.
Cholesterol:
Decreases membrane fluidity.
Lowers permeability to some substances.
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