Enzymes (VCE SSCE Chemistry): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What are enzymes?
What are enzymes?
Biological catalysts that are proteins
How do enzymes speed up reactions?
How do enzymes speed up reactions?
By lowering activation energy
What makes enzymes different from inorganic catalysts?
What makes enzymes different from inorganic catalysts?
Enzymes are highly specific
Which enzyme catalyzes the hydrolysis of sucrose into glucose and fructose?
Which enzyme catalyzes the hydrolysis of sucrose into glucose and fructose?
Sucrase
What is the relationship between an enzyme's active site and its substrate?
What is the relationship between an enzyme's active site and its substrate?
The active site is complementary
In the lock-and-key model, what forms when the substrate binds to the enzyme?
In the lock-and-key model, what forms when the substrate binds to the enzyme?
An enzyme-substrate complex
What is the optimum temperature for enzymes in human cells?
What is the optimum temperature for enzymes in human cells?
Approximately 37°C
What is the key difference between deactivation at low temps and denaturation at high temps?
What is the key difference between deactivation at low temps and denaturation at high temps?
Deactivation is reversible
What is the optimum pH for pepsin, which works in the stomach?
What is the optimum pH for pepsin, which works in the stomach?
Approximately 1.5
Why can tinned pineapple be used in jelly while fresh pineapple prevents setting?
Why can tinned pineapple be used in jelly while fresh pineapple prevents setting?
Heating denatures bromelain enzyme