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10 questions
Which of the following is closest to the thickness of a cell (plasma) membrane?
1mm
0.01 μm
10 μm
0.1 nm
Which if the following is not a structural part of the cell (plasma) membrane?
phospholipids
cholesterol
proteins
DNA
Which of the following is not a major function of the cell (plasma) membrane?
cell to cell communication
provides a strong structure to keep the cell stiff and solid
cell recognition
controls the movement of substances in and out of the cell
Phospholipids are made up of two parts. Which of the following correctly describes these two parts?
hydrophobic head, hydrophilic tail
hydrophobic head, hydrophobic tail
hydrophilic head, hydrophobic tail
hydrophilic head, hydrophilic tail
Which image correctly shows the way phospholipids arrange themselves in the cell (plasma) membrane?
The model that describes the current understanding of the cell (plasma) membrane structure is
fluidity model
fluid mosaic model
semi-permeable model
flexible mixture model
Proteins that make up the cell (plasma) membrane
are only found on the outer side of the phospholipid bilayer
are able to provide a passageway for certain substance to pass through the membrane
are only found on the inner side of the phospholipid bilayer
are only found in the middle of the phospholipid bilayer
The ability of the cell (plasma) membrane to control what substances can pass through is referred to as
semi-barrier
semi-permeable
fully permeable
fluid mosaic
Structure A in the diagram is
cholesterol
phospholipid
glycoprotein
channel protein
Which of the following is incorrect about substances that can easily pass through the phospholipid bilayer?
small, lipid soluble molecules
small, uncharged molecules
large molecules that are soluble in water
molecules like carbon dioxide or oxygen
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