Introduction to Lipids Quiz

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Questions and Answers

Which type of fatty acid is typically found in whole milk, egg yolks, and coconut oil?

  • Trans fatty
  • Monounsaturated
  • Saturated (correct)
  • Polyunsaturated

What determines whether a fatty acid is classified as saturated, unsaturated, monounsaturated, polyunsaturated, or trans fatty?

  • The number of carbon atoms in the chain
  • The level of unsaturation
  • The presence of oxygen
  • The chemical bonds and structure (correct)

Which type of phospholipid is predominant in the cell membrane?

  • Glycerophospholipid (correct)
  • Sphingophospholipid
  • Phosphatidylcholine
  • Ceramide

What are waxes primarily composed of which makes them insoluble in water?

<p>Long-chain fatty acids (A)</p> Signup and view all the answers

Which lipids are deeply involved in the myelin sheath surrounding most nerve fibers?

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

Which of the following is NOT a major category of lipids?

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

What type of compounds are lipids in terms of their solubility in water?

<p>They are insoluble in water (A)</p> Signup and view all the answers

What is the main characteristic of triglycerides?

<p>They are made up of glycerol and 3 fatty acids connected by peptide bonds (D)</p> Signup and view all the answers

What characteristic differentiates fats from oils?

<p>Fats are solids at room temperature, while oils are liquids (B)</p> Signup and view all the answers

What type of compounds are terpenes and steroids?

<p>They are hydrocarbons (D)</p> Signup and view all the answers

During which phase of the cell cycle does DNA replicate?

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

What is the main characteristic that differentiates diploid cells from haploid cells?

<p>Number of chromosomes sets (D)</p> Signup and view all the answers

In which stage of meiosis does the separation of homologous chromosomes occur?

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

What is the key event of telophase in mitosis?

<p>Formation of daughter cells (D)</p> Signup and view all the answers

In which phase of the cell cycle does the cell actually divide and make daughter cells?

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

Which statement accurately describes the arrangement of membrane phospholipids?

<p>The hydrophobic fatty acid tails are directed towards the polar, aqueous fluids of both the cytosol and the environment. (A)</p> Signup and view all the answers

What is the functional role played by cholesterol in the cellular membrane?

<p>Cholesterol augments the basic structure provided by phospholipids. (A)</p> Signup and view all the answers

What type of motions can membrane proteins exhibit?

<p>Lateral movement and rotation (D)</p> Signup and view all the answers

What is the primary orientation of the fatty acid tails of membrane phospholipids?

<p>Away from the polar environment (A)</p> Signup and view all the answers

What characteristic differentiates the arrangement of membrane lipids from that of membrane proteins?

<p>Lipids exhibit lateral movement, while proteins can flip between layers. (A)</p> Signup and view all the answers

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