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What Happens in Cells (& What do Cells Need?) (OCR GCSE Combined Science A (Gateway): Biology)

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What Happens in Cells (& What do Cells Need?)

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What Happens in Cells (& What do Cells Need?)

1
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Which of the following statements would be the best description of DNA?

  • DNA is usually single-stranded.

  • DNA is a polymer of sugar molecules.

  • Every persons' DNA is unique.

  • DNA is a chemical molecule that determines the characteristics of living organisms. 

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2
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Which of the following best describes what an enzyme is?

  • A catalyst that speeds up reactions in cells, being used up in the process

  • A protein that speeds up reactions in cells, being used up in the process

  • A carbohydrate that functions as a biological catalyst

  • A protein that functions as a biological catalyst

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3
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Which graph in the image below shows the correct effect of temperature on the activity of an enzyme?

5-q3-temperature

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    4
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    Which does not contain DNA?

    • Cell membrane

    • Chromosome

    • Nucleus

    • Plasmid

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    5
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    DNA is a polymer. What is the name of the monomer in DNA?

    • Base

    • Deoxyribose sugar

    • Nucleotide

    • Phosphate

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    6
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    Which structure most closely resembles DNA?

    q3-paper1h-june2019-ocrgcsebio

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      7
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      Look at the model of enzyme activity.

      q4-paper1h-june2019-ocrgcsebio

      Which label represents the active site of an enzyme?

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