The Chemistry of Life #1: Atoms and Molecules

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Questions and Answers

What is the main function of lipids in living things?

  • Store energy (correct)
  • Regulate body functions
  • Carry oxygen
  • Form enzymes

Which fatty acids are typically healthier for humans to consume?

  • Trans fatty acids
  • Monounsaturated fatty acids
  • Saturated fatty acids
  • Unsaturated fatty acids (correct)

Where is glycogen, a form of starch, mainly stored in animals?

  • Plant cells
  • Liver and muscles (correct)
  • Animal organs
  • Cell membranes

What are proteins mainly composed of?

<p>Carbon, Hydrogen, Oxygen, and Nitrogen (A)</p> Signup and view all the answers

Which test can be used to identify the presence of proteins?

<p>Millon’s reagent or Biuret test (B)</p> Signup and view all the answers

What is the main component of plant cell walls?

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

Which elements are always present in all compounds?

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

How are carbohydrates classified based on their size?

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

What is the main function of carbohydrates in living organisms?

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

What do simple sugars like glucose serve as in carbohydrates?

<p>Energy storage units (D)</p> Signup and view all the answers

How do Benedict’s solution and Fehling’s A and B solutions react in the presence of glucose?

<p>Change to red-brown upon heating (B)</p> Signup and view all the answers

Why are carbohydrates referred to as 'saccharides'?

<p>Originating from the word 'sugar' (D)</p> Signup and view all the answers

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