How well do you understand living things and their vital processes? Whether you are preparing for JAMB, WAEC, NECO and Post-UTME, these Biology past questions and answers cover such subjects as the chemistry of life, botany, evolution, genetics, ecology etc to help you know what to expect, improve your speed and confidence and be really prepared for the actual aptitude test.
Which of the following enzymes is not one of the main classes of enzymes?
Sucrase
Amylases
Proteases
Lipases
Correct answer is A
No explanation has been provided for this answer.
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?
X = Maltose and Y = Sugar
X = Starch and Y = Maltose
X = Sugar and Y = Starch
X = Maltose and Y = Starch
Correct answer is B
No explanation has been provided for this answer.
Enzymes can be inactivated by certain chemical substances in the body called
catalysts
inhibitors
substrates
activators
Correct answer is B
No explanation has been provided for this answer.
The colour that is associated with a positive iodine test is
brown
red
blue-black
yellow
Correct answer is C
No explanation has been provided for this answer.
hydrolyse the non-reducing sugar
accelerate he rate of the reaction
stabilize the medium
sterilize the solution
Correct answer is A
No explanation has been provided for this answer.