Lipids in Biochemistry
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Questions and Answers

Which lipid is found in the brain?

  • Cholesterol
  • Glycolipids
  • Cardiolipin
  • Sphingomyelin (correct)

    • What is the simplest glycolipid called?

  • Sphingomyelin
  • Cerebroside (correct)
  • Cardiolipin
  • Cholesterol

    • How is cholesterol structured?

  • 4 linked hydrocarbon rings (correct)
  • Single hydrocarbon ring
  • Unlinked hydrocarbon rings
  • 3 linked hydrocarbon rings

    • What do bile salts originate from?

    <p>Cholesterol</p> Signup and view all the answers

    Which lipid profile component is associated with high-density lipoprotein cholesterol?

    <p>Triglyceride</p> Signup and view all the answers

    Where is cardiolipin primarily found?

    <p>Heart</p> Signup and view all the answers

    Which type of fatty acids carry the maximum possible number of hydrogen atoms?

    <p>Saturated fatty acids</p> Signup and view all the answers

    In a trans-fatty acid, where are the hydrogen atoms located in relation to the double bond?

    <p>On opposite sides of the double bond</p> Signup and view all the answers

    Which type of fatty acids are necessary for vital functions and are derived from the diet?

    <p>Essential fatty acids</p> Signup and view all the answers

    What is the main function of triglycerides in metabolism?

    <p>Energy source and transporter of dietary fat</p> Signup and view all the answers

    Which type of lipids contain one or more fatty acids attached to a phosphate and an alcohol?

    <p>Phospholipids</p> Signup and view all the answers

    What are phosphoglycerides derived from?

    <p>Glycerol</p> Signup and view all the answers

    What is the defining feature of lipids?

    <p>Insolubility in water</p> Signup and view all the answers

    How are fatty acids named systematically?

    <p>By substituting oic for the final e</p> Signup and view all the answers

    Why does the water-insolubility of lipids contribute to complexity in their digestion and metabolism?

    <p>It poses challenges for combining them with water-soluble substances</p> Signup and view all the answers

    What is the role of bimolecular sheets in gaseous exchange related to lipids?

    <p>Bimolecular sheets facilitate the transport of lipids</p> Signup and view all the answers

    What type of solvents are lipids highly soluble in?

    <p>Non-polar solvents</p> Signup and view all the answers

    Why are lipids essential to the overall energy economy of the cell?

    <p>They contribute to the cell's metabolism</p> Signup and view all the answers

    Which type of fatty acids lack hydrogen atoms and have at least one double bond?

    <p>Unsaturated fatty acids</p> Signup and view all the answers

    In a cis fatty acid, where are the hydrogen atoms located in relation to the double bonds?

    <p>On the same side of the double bonds</p> Signup and view all the answers

    Which fatty acid is an example of a saturated fatty acid with no double bonds?

    <p>Stearic Acid</p> Signup and view all the answers

    Phospholipids may be attached to glycerol or which other compound?

    <p>Sphingosine</p> Signup and view all the answers

    Which type of fatty acids are produced by the body and are not derived from the diet?

    <p>Non-essential fatty acids</p> Signup and view all the answers

    What is the main function of triglycerides in metabolism?

    <p>To transport dietary fat</p> Signup and view all the answers

    Which lipid component is a major constituent of very low-density lipoprotein (VLDL)?

    <p>Triglycerides</p> Signup and view all the answers

    What is the distinguishing feature of trans-fatty acids?

    <p>Their hydrogen atoms are on opposite sides of the double bond</p> Signup and view all the answers

    What is the role of essential fatty acids within the body?

    <p>To perform vital functions and maintain health</p> Signup and view all the answers

    Which lipid contains a sugar residue of glucose or galactose and is found in neural tissue?

    <p>Cerebroside</p> Signup and view all the answers

    In which lipid is the orientation of the molecule parallel to the fatty acid chains of phospholipids, with the hydroxyl group interacting with nearby phospholipid head groups?

    <p>Cholesterol</p> Signup and view all the answers

    Which lipid has a hydrocarbon tail linked to the steroid at one end and a hydroxyl group attached at the other end?

    <p>Cholesterol</p> Signup and view all the answers

    What type of lipids differ from sphingomyelin based on the identity of the unit linked to the primary hydroxyl group of the sphingosine backbone?

    <p>Glycolipids</p> Signup and view all the answers

    Which lipid originates from cholesterol and includes Taurine or Glycine along with the 4 linked hydrocarbon rings?

    <p>Bile Salt</p> Signup and view all the answers

    Where is Sphingomyelin primarily found?

    <p>Brain</p> Signup and view all the answers

    What is the composition of Sterol Lipids in addition to the 4 linked hydrocarbon rings?

    <p>Taurine or Glycine</p> Signup and view all the answers

    "Glycolipids are sugar-containing lipids derived from sphingosine." What differentiates glycolipids from sphingomyelin?

    <p>&quot;Glycolipids have a different linking unit in the sphingosine backbone.&quot;</p> Signup and view all the answers

    What is the systematic name for a C16 fatty acid with one double bond?

    <p>Hexadecenoic</p> Signup and view all the answers

    Why do lipids exhibit insolubility in water, contributing to complexity in their digestion and metabolism?

    <p>The non-polar nature of lipids prevents interaction with water molecules</p> Signup and view all the answers

    Which of the following is NOT a function of lipids in the energy economy of the cell?

    <p>Facilitation of protein synthesis</p> Signup and view all the answers

    In an unsaturated fatty acid, what does the term 'unsaturated' refer to?

    <p>The presence of double bonds in the hydrocarbon chain</p> Signup and view all the answers

    Which type of lipids are highly soluble in non-polar solvents like Chloroform and ether?

    <p>Steroids</p> Signup and view all the answers

    What is the main feature that defines lipids and sets them apart from other organic compounds?

    <p>Insolubility in water but solubility in non-polar solvents</p> Signup and view all the answers

    How are the carbon atoms numbered in fatty acids starting from the Carboxyl terminus?

    <p>Starting at the first carbon adjacent to the carboxyl group</p> Signup and view all the answers

    What is the primary role of non-polar solvents like Chloroform and ether in lipid solubility?

    <p>Disrupting intermolecular forces between lipid molecules</p> Signup and view all the answers

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