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Thursday, 12 November 2026
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Biology Past Questions and Answers

Waec Biology Questions

Question 1106:
Enzymes can be inactivated by certain chemical substances in the body called
  • A Catalysts
  • B Inhibitors
  • C Substrates
  • D Activators
View Answer & Explanation
Question 1107:
Use the following equations to answer the question below
I - Boiled saliva + starch → X
II - Fresh saliva + starch → Y What substances do X and Y represent?
  • A X = Maltose and Y = Sugar
  • B X = Starch and Y = Maltose
  • C X = Sugar and Y = Starch
  • D X = Maltose and Y = Starch
View Answer & Explanation
Question 1108:
Which of the following enzymes is not one of the main classes of enzymes?
  • A Sucrase
  • B Amylases
  • C Proteases
  • D Lipases
View Answer & Explanation
Question 1109:
Which of the following enzymes does not belong to proteases?
  • A Sucrase
  • B Pepsin
  • C Trypsin
  • D Erepsin
View Answer & Explanation
Question 1110:
Which of the following protozoans feeds parasitically
  • A Paramecium
  • B Chlamydomonas
  • C Plasmodium
  • D Euglena
View Answer & Explanation