0%

DP IB Biology: HL

Topic Questions

Home / IB / Biology: HL / DP / Topic Questions / 2. Molecular Biology / 2.1 Metabolism & Water / Structured Questions: Paper 2


2.1 Metabolism & Water

Question 1a

Marks: 1
a)

Define hydrophilic.

[1 mark]

    Assess your score
      

    Question 1b

    Marks: 2
    b)

    State two advantages of a carbon atom being able to form four bonds to neighbouring atoms.

    [2 marks]

      Assess your score
        
      Key Concepts
      Carbon

      Question 1c

      Marks: 3
      c)

      List three carbon compounds that living organisms are based upon. 

      [3 marks]

        Assess your score
          
        Key Concepts
        Carbon Compounds

        Question 1d

        Marks: 1
        d)

        State which part of metabolism is occurring at II in the flowchart below.

        2-1-e-1d-paper-2

        [1 mark]

          Assess your score
            
          Key Concepts
          Metabolism

          Question 2a

          Marks: 1
          a)

          State the aspect of the molecular behaviour of water that is used to explain why it is highly important to living organisms.

          [1 mark]

            Assess your score
              
            Key Concepts
            Hydrogen Bonds

            Question 2b

            Marks: 3
            b)

            Two of the properties of water are its cohesive and adhesive forces.

            Describe how these properties are useful to living organisms.

            [3 marks]

              Assess your score
                
              Key Concepts
              Properties of Water

              Question 2c

              Marks: 2
              c)

              Both water and methane are small molecules containing single covalent bonds between their atoms. 

              State two differences between these two molecules that make their physical properties very different.

              [2 marks]

                Assess your score
                  

                Question 2d

                Marks: 2
                d)

                List two physical properties, associated with their state of matter, that differ between water and methane.

                [2 marks]

                  Assess your score
                    

                  Question 3a

                  Marks: 1
                  a)

                  Define molecular biology.

                  [1 mark]

                    Assess your score
                      
                    Key Concepts
                    Molecular Biology

                    Question 3b

                    Marks: 1
                    b)
                    State the name of the compound that was synthesised artificially, providing evidence that living organisms are not required to produce organic compounds.

                    [1 mark]
                      Assess your score
                        

                      Question 3c

                      Marks: 3
                      c)

                      Draw a labelled diagram of a water molecule.

                      [3 marks]

                        Assess your score
                          
                        Key Concepts
                        Properties of Water

                        Question 4a

                        Marks: 2
                        a)

                        Identify which of the diagrams below is a lipid, giving one reason why.

                        2-1-e-4-paper-2

                        [2 marks]

                          Assess your score
                            

                          Question 4b

                          Marks: 2
                          b)

                          Draw a molecular diagram of D-ribose.

                          [2 marks]

                            Assess your score
                              

                            Question 4c

                            Marks: 2
                            c)

                            List, using simplified notation, two of the chemical groups found in a generalised amino acid.

                            [2 marks]

                              Assess your score
                                

                              Question 4d

                              Marks: 2
                              d)

                              State, giving one reason, which diagram shows the structure of a saturated fatty acid.

                              2-1-e-4d-paper-2

                              [2 marks]

                                Assess your score
                                  
                                Key Concepts
                                Fatty Acids: Types

                                Question 5a

                                Marks: 3

                                One mark is available for clarity of communication throughout this question.

                                a)

                                Outline the theory that states that organic molecules could only be derived from living systems.

                                [3 marks]

                                  Assess your score
                                    

                                  Question 5b

                                  Marks: 5
                                  b)

                                  Distinguish between anabolic and catabolic reactions. 

                                  Include one example of each reaction.

                                  [5 marks]

                                    Assess your score
                                      
                                    Key Concepts
                                    Catabolism
                                    Anabolism

                                    Question 5c

                                    Marks: 7
                                    c)

                                    Describe the properties of water molecules that enable them to transport metabolites, using four named examples.

                                    [7 marks]

                                      Assess your score