Biological membranes are critical components of cells that allow compartmentalisation of cellular contents. The diagram shows a biological membrane comprised of a lipid bilayer with a single polypeptide integrated into the membrane and spanning the membrane seven times.  What types of amino acids are likely present in the parts of the polypeptide chain labelled 1-7 and in the parts of labelled A-G?  What is the name of the effect that forces the polypeptide to arrange itself like this within the lipid bilayer?  Give an example of a type of molecule that can move freely across the lipid bilayer and explain why it can do so based on its chemical properties.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Biological membranes are critical components of cells that allow compartmentalisation of cellular contents. The diagram shows a biological membrane comprised of a lipid bilayer with a single polypeptide integrated into the membrane and spanning the membrane seven times. 

What types of amino acids are likely present in the parts of the polypeptide chain labelled 1-7 and in the parts of labelled A-G? 

What is the name of the effect that forces the polypeptide to arrange itself like this within the lipid bilayer? 

Give an example of a type of molecule that can move freely across the lipid bilayer and explain why it can do so based on its chemical properties. 

N-terminus
Outside
F
B
4
5
6
7
E
A
C
G
Inside
C-terminus
3.
Transcribed Image Text:N-terminus Outside F B 4 5 6 7 E A C G Inside C-terminus 3.
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