Lipids and Fatty Acids
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Questions and Answers

What is the key characteristic of amphipathic molecules?

  • They are involved in glycosidic bonds
  • They are always saturated
  • They are always found in lipids
  • They have both hydrophobic and hydrophilic regions (correct)

Why are lipids not considered true polymers?

  • They are always saturated
  • They do not have a repeating monomer unit (correct)
  • They do not have a hydrophobic tail
  • They are always found in membranes

What is the difference between omega-3 and omega-6 fatty acids?

  • Their function in the body
  • Their degree of unsaturation
  • Their chain length
  • The location of their first double bond (correct)

How does the degree of unsaturation of a fatty acid affect its melting point?

<p>It decreases the melting point (B)</p> Signup and view all the answers

What is the main difference between integral and peripheral membrane proteins?

<p>Their location in the membrane (D)</p> Signup and view all the answers

Why is cholesterol important for membrane fluidity?

<p>It modulates the fluidity of the membrane (B)</p> Signup and view all the answers

What is the significance of the hydrophobic effect in the context of membranes?

<p>It facilitates the asymmetric assembly of membrane lipids. (C)</p> Signup and view all the answers

What is the primary difference between saturated and unsaturated fatty acids?

<p>Presence of double bonds (D)</p> Signup and view all the answers

How do the four classes of lipids differ in terms of their structure?

<p>By the number of fatty acid chains (C)</p> Signup and view all the answers

What is the significance of the number designation (X:X) in fatty acids?

<p>It indicates the number of double bonds in the fatty acid chain (C)</p> Signup and view all the answers

How does fat storage compare to glycogen storage in humans?

<p>Fat storage is more energy-efficient than glycogen storage (D)</p> Signup and view all the answers

What is the characteristic of membranes that allows them to be asymmetric?

<p>They are non-covalent assemblies (B)</p> Signup and view all the answers
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