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A-Level Biology OCR A

Examples Inactive Precursor Give Enzymes Describe Activated Pepsinogen

Pepsinogen activates to pepsin via stomach acid (low pH), and trypsinogen is activated to trypsin by enteropeptidase.

Pepsinogen becomes active pepsin in response to stomach acid (low pH), and trypsinogen is activated into trypsin by the enzyme enteropeptidase.

Front Give 2 examples of inactive precursor enzymes and describe how they are activated.
Back Examples of inactive precursor enzymes:
  • Pepsinogen becomes pepsin when exposed to stomach acid bc the low pH brings about the transformation
  • Trypsinogen becomes trypsin when cleaved into active form by enteropeptidase

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