Respiration (OCR Gateway GCSE Biology)

Exam Questions

44 mins20 questions
1
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Which statement best summarises cellular respiration?

  • Stored chemical energy is transferred from organic molecules to ATP

  • Food is broken down into glucose

  • Oxygen diffuses into red blood cells

  • Energy in the form of ATP is used in metabolic processes

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2
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Glucose is broken down in the chemical processes of aerobic respiration.

Which row of the table below shows the correct products of this breakdown?

  energy water lactic acid carbon dioxide
A X X X
B X X
C X X
D X

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    3
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    Which statement best describes why our bodies heat-up when we exercise?

    • Our bodies take in heat from the surrounding environment

    • Cellular respiration is an exothermic reaction

    • There is a greater demand for oxygen when exercising

    • Cellular respiration is an endothermic reaction

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    4
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    Which of the following processes would release the most energy in a cell from one molecule of glucose?

    1

    Aerobic respiration in yeast

    2

    Aerobic respiration in animals

    3

    Aerobic respiration in plants

    • 2 only

    • 3 only

    • 1 & 3

    • All of the above

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    5
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    The diagram below shows an experiment set up by a group of students to investigate respiration in standard baker's yeast.

    1-1

    Which row of the table below correctly describes the contents of the flask after 20 hours?

      new compound gas evolved
    A ethanol (alcohol) oxygen
    B ethanol (alcohol) carbon dioxide
    C lactic acid oxygen
    D lactic acid carbon dioxide

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      6
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      Which molecule is not a polymer?

      • DNA

      • Lipid

      • Protein

      • Starch

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      7
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      This is a cell.

      q7-paper1h-june2018-ocrgcsebio
      Where does cellular respiration occur?

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        8
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        What are proteins made of?

        • Amino acids

        • Fatty acids

        • Nucleotides

        • Sugars

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        9
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        What is the word equation for aerobic respiration?

        • Carbon dioxide + water ➞ glucose + oxygen

        • Glucose + carbon dioxide ➞ oxygen + water

        • Glucose + oxygen ➞ carbon dioxide + water

        • Oxygen + water ➞ glucose + carbon dioxide

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        10
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        What type of reactions are photosynthesis and respiration?

          photosynthesis respiration
        A endothermic endothermic
        B endothermic exothermic
        C exothermic endothermic
        D exothermic exothermic

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          11
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          Which two substances are products of anaerobic respiration in yeast?

          • Carbon dioxide and ethanol

          • Carbon dioxide and water

          • Oxygen and ethanol

          • Oxygen and water

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          12
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          Pond snails and pondweed are living in water in sealed test tubes.q2-paper1h-june2019-ocrgcsebio

          Carbon dioxide dissolves in water and forms an acid.

          In which test tube would the water become most acidic?

          • 1

          • 2

          • 3

          • 4

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          13
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          The diagram shows positive results in two different food tests.q8-paper1h-june2019-ocrgcsebio

          What do the results show in each tube?

            Tube 1 Tube 2
          A sugar lipid
          B starch sugar
          C protein sugar
          D starch protein

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            14
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            Aerobic respiration occurs all the time in plant cells but photosynthesis only occurs in daylight.

            Why is more energy released by a plant cell during the night?

            • Photosynthesis is endothermic taking in energy and aerobic respiration is exothermic.

            • Photosynthesis is exothermic taking in energy and aerobic respiration is endothermic.

            • Aerobic respiration is exothermic taking in energy and photosynthesis is endothermic.

            • Aerobic respiration is endothermic taking in energy and photosynthesis is exothermic.

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            15
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            Which monomer is used to make proteins?

            • Amino acid

            • Fatty acid

            • Glucose

            • Glycerol

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            16
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            When the enzyme lipase is mixed with a lipid which of the following will increase in concentration?

            • Amino acids

            • Fatty acids and glycerol

            • Glucose and fructose

            • Starch

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