Structure and Composition of Waxes, Fats, and Phospholipids

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Questions and Answers

What is the most common type of lipid present in our body?

  • Waxes
  • Triglycerides (correct)
  • Fixed oils
  • Prostaglandins

Which type of bonds do saturated fats have?

  • Triple bonds
  • Double bonds
  • No bonds
  • Single bonds (correct)

What is the chief difference between fixed oils and fats?

  • Degree of saturation
  • Number of double bonds present
  • Type of alcohol found in them (correct)
  • Presence of phospholipids

Which lipid compound has a phosphate group and a polar group?

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

What is the general term for the esters of long-chain fatty acids and alcohols or closely related derivatives?

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

Which lipid compound is known for its role in increasing the risk of heart disease?

<p>Saturated fats (C)</p> Signup and view all the answers

What type of oil undergoes oxidation when exposed to air and forms a tough and hard film?

<p>Drying oil (C)</p> Signup and view all the answers

Which type of fixed oil does not undergo oxidation or form a tough and hard film when exposed to air?

<p>Non-drying oil (C)</p> Signup and view all the answers

What type of fixed oil undergoes a little bit of oxidation when exposed to air and forms a tough and thin film?

<p>Semi-drying oil (C)</p> Signup and view all the answers

How are animal fats separated from other tissues for extraction?

<p>By rendering with steam (B)</p> Signup and view all the answers

What does the term 'iodine value' (I.V.) refer to in the context of fixed oils?

<h1>of grams of iodine absorbed by 100g of the sample (A)</h1> Signup and view all the answers

What is the main component of soap that helps to emulsify and wash away oily dirt?

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

In the structure of fats, what makes the whole molecule hydrophobic?

<p>The fatty acid tails (A)</p> Signup and view all the answers

Which type of molecule has a long hydrocarbon chain that is hydrophobic and a carboxyl group head that is hydrophilic?

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

What type of bonds link the 3 fatty acids to glycerol in triglycerides?

<p>Ester linkages between OH &amp; COOH (B)</p> Signup and view all the answers

Which of the following is a property of fixed oils?

<p>Non-irritant and odorless (D)</p> Signup and view all the answers

What do fixed oils produce on paper when applied?

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

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