Phospholipids and Inorganic Ions in Biology
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Questions and Answers

What type of molecules are amino acids considered to be?

  • Carbohydrates
  • Lipids
  • Proteins (correct)
  • Nucleic acids
  • Which part of an amino acid is responsible for its distinctive properties?

  • R group (correct)
  • Amino group (NH2)
  • Carboxylic acid group
  • Hydrogen ion concentration
  • How are amino acids joined together in proteins?

  • Peptide bonds (correct)
  • Hydrogen bonds
  • Glycosidic bonds
  • Phosphodiester bonds
  • Which component of phospholipids is attracted to water?

    <p>Phosphate heads</p> Signup and view all the answers

    Iron ions are a component of which important molecule in red blood cells?

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

    What do hydrogen ions determine in substances like blood?

    <p>$pH$</p> Signup and view all the answers

    Which of the following statements about proteins is correct?

    <p>Proteins are polymers of amino acids linked by peptide bonds.</p> Signup and view all the answers

    Which of the following is NOT a function of proteins in living organisms?

    <p>Storage of genetic information</p> Signup and view all the answers

    Which of the following is a primary structural level of a protein?

    <p>Sequence of amino acids</p> Signup and view all the answers

    What is the role of phospholipids in biological membranes?

    <p>They form the hydrophobic interior of the membrane.</p> Signup and view all the answers

    Which of the following inorganic ions is NOT required for biological processes in living organisms?

    <p>Lead ions (Pb2+)</p> Signup and view all the answers

    What is the primary function of macromolecules in living organisms?

    <p>Carry out diverse structural and functional roles</p> Signup and view all the answers

    What type of reaction joins monomers by chemical bonds and involves the elimination of a water molecule?

    <p>Condensation reaction</p> Signup and view all the answers

    Which type of saccharide can join together to form disaccharides and polysaccharides?

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

    What is the main substrate for respiration and contains six carbon atoms in each molecule?

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

    Which type of molecule consists only of carbon, hydrogen, and oxygen, and forms long chains of sugar units called saccharides?

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

    Which type of reaction involves adding water to break a chemical bond between two molecules?

    <p>Hydrolysis reaction</p> Signup and view all the answers

    What is the process called when monomers are joined together to form polymers?

    <p>Condensation reaction</p> Signup and view all the answers

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