Quiz on Membrane structure (1.3)
1.
Which of the following is not a function performed by a membrane protein?
A.
Hormone binding sites
B.
Cell adhesion
C.
Enzyme synthesis
D.
Pumps for active transport
(Total 1 mark)
2.
What is the function of the cytoplasmic (plasma) membrane of this bacterium?
A.
To produce ADP
B.
To form the only protective layer preventing damage from outside
C.
To control entry and exit of substances
D.
To synthesize proteins
(Total 1 mark)
3.
Which of the following is not a function of cholesterol in cell membranes?
I. Increase fluidity
II. Increase flexibility
III. Decreases permeability of the membrane to polar molecules
A.
I only
B.
I and II only
C.
II and III only
D.
III only
(Total 1 mark)
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(Chris Paine)
Quiz on Membrane structure (1.3)
4.
The diagram below shows a plasma membrane. What is molecule X?
A.
Cholesterol
B.
Peripheral protein
C.
Glycoprotein
D.
Polar amino acid
(Total 1 mark)
5.
(a)
Draw a labelled diagram to show the fluid mosaic structure of a plasma membrane, indicating
the hydrophilic and hydrophobic regions.
(5)
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(Chris Paine)
Quiz on Membrane structure (1.3)
(b)
Compare and contrast the Davson-Danielli and Singer-Nicholson models of cell membranes and
describe the evidence that disproves the Davson-Danielli model.
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(4)
(c)
Explain how the properties of phospholipids help to maintain the structure of cell membranes.
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(3)
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(Chris Paine)