Lipids: Types and Biological Functions
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Questions and Answers

What is the primary function of waxes in vertebrates?

  • To protect and provide pliability for hair and skin (correct)
  • To act as emulsifiers for dietary lipids
  • To waterproof feathers in birds
  • To provide storage of metabolic fuel

What is the primary role of bile acids/salts in the small intestine?

  • To act as a metabolic fuel
  • To synthesize cholesterol
  • To store and concentrate in the gallbladder
  • To emulsify dietary lipids (correct)

What is the primary function of waxes in tropical plants and ivy?

  • To emulsify dietary lipids
  • To act as a storage lipid
  • To protect and provide pliability for skin
  • To provide waterproofing (correct)

Where are bile acids/salts synthesized?

<p>In the liver (D)</p> Signup and view all the answers

What is the primary function of waxes in birds?

<p>To waterproof feathers (D)</p> Signup and view all the answers

What is the primary role of bile acids/salts in the digestive process?

<p>To act as emulsifiers for dietary lipids (C)</p> Signup and view all the answers

Which of the following is NOT a class of lipids discussed in the text?

<p>Prostaglandins (A)</p> Signup and view all the answers

What is the primary function of triacylglycerols in biological systems?

<p>To store energy (B)</p> Signup and view all the answers

Which of the following statements about fatty acids is correct?

<p>Fatty acids can have double bonds (C)</p> Signup and view all the answers

Based on the classification methods mentioned in the text, which of the following is NOT a method used to classify lipids?

<p>Molecular weight (A)</p> Signup and view all the answers

Which of the following lipids are primarily found in cell membranes?

<p>Phospholipids (B)</p> Signup and view all the answers

Which of the following is a biological function of lipids related to signaling?

<p>Acting as paracrine hormones (D)</p> Signup and view all the answers

Which biological function of lipids is related to their hydrophobic nature?

<p>Providing water repellency and preventing excessive wetting (C)</p> Signup and view all the answers

Which of the following is a biological function of lipids related to their role as pigments?

<p>Contributing to the color of fruits and vegetables (B)</p> Signup and view all the answers

Which of the following is a biological function of lipids related to their role as precursors?

<p>Acting as precursors for hormones like vitamin A and D (C)</p> Signup and view all the answers

Which of the following is a biological function of lipids related to their role in blood clotting?

<p>Acting as the cofactor vitamin K in blood clot formation (A)</p> Signup and view all the answers

Which of the following is a biological function of lipids related to their role in growth and development?

<p>Acting as signaling molecules like steroid hormones and growth factors (D)</p> Signup and view all the answers

Flashcards

Waxes in vertebrates

Protect and make hair/skin flexible

Bile acids/salts in small intestine

Break down fats into smaller parts

Waxes in plants

Prevent water loss in tropical plants and ivy.

Bile acid synthesis location

Liver produces bile acids.

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Waxes in birds

Waterproof bird feathers

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Bile acids' role in digestion

Emulsify fats for absorption

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Lipid class NOT in the text

Prostaglandins. (Not present in the given set of information)

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Triacylglycerol function

Store energy in biological systems

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Fatty acid characteristic

Can have double bonds

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Lipid classification method NOT used

Molecular weight

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Cell membrane lipids

Phospholipids are main components

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Lipid signaling molecule

Paracrine hormones

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Hydrophobic lipid function

Water repellency and prevent excessive wetting

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Lipid pigment function

Coloring in fruits and vegetables

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Hormone precursor lipid

Vitamin A and D

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Lipid function in blood clotting

Vitamin K cofactor

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Lipid function in growth/development

Signaling molecules like steroid hormones and growth factors

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