Biochemistry with Dr. Khaled Elshamanhory: Isotopes, Bonds, Vitamins, pH

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Questions and Answers

What is the function of proteins in the body?

  • Act as cell membranes
  • Convert light energy into chemical energy
  • Speed up chemical reactions as catalysts (correct)
  • Store genetic information

Which type of bond is responsible for the rise of water in trees?

  • Van Der Waals forces
  • Hydrogen bond (correct)
  • Covalent bond
  • Ionic bond

What is the effect of high levels of cholesterol in the body?

  • Improved memory function
  • Boosted metabolism
  • Increased risk of atherosclerosis (correct)
  • Enhanced muscle growth

What type of molecules are classified as water-soluble and hydrophilic?

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

What is the final product of aerobic cellular respiration?

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

Which process occurs in the absence of oxygen?

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

Which pH value indicates a base?

<p>8 (C)</p> Signup and view all the answers

What is the main energy source in the form of a monosaccharide?

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

What is the role of the active site in enzymes?

<p>Interact with specific substrates (D)</p> Signup and view all the answers

Which type of fatty acids are found in plant oils?

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

Which process involves breaking down polymers into monomers?

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

What type of bond is responsible for the hydrogen bonding in water?

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

Which molecule is used for glucose storage in animals?

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

What is the main function of wax in plants?

<p>Preventing water loss (A)</p> Signup and view all the answers

In which environment would a water-soluble vitamin be most stable?

<p>Water-based environment (A)</p> Signup and view all the answers

What is the function of cholesterol in the cell membrane?

<p>Hold the cell membrane together (A)</p> Signup and view all the answers

What is the role of NAD+ and FAD in cellular respiration?

<p>Transport high energy electrons (B)</p> Signup and view all the answers

What happens to proteins when they undergo denaturation?

<p>They lose their specific active site (B)</p> Signup and view all the answers

What is the main function of enzymes in biochemical reactions?

<p>Speed up reactions (C)</p> Signup and view all the answers

Where does the Krebs cycle take place in the cell?

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

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