Enzymes Quiz
Preview:
Which of the following is an example of a degradation reaction?
A. Glucose with phosphorylase to form Starch
B. Starch with amylase to form maltose
Enzymes and substrates are … to one another
A. Complimentary
B. Harmonious
C. Supportive
D. Reciprocal
What happens when an enzyme denatures?
A. The enzyme becomes overused
B. The substrate has run out
C. The primary structure of the protein ahs changed
D. The shape of the active site has changed
What is the function of the active site of an enzyme?
A. It is the part of the enzyme where a substrate attaches and a chemical reaction occurs.
B. It is the part of the enzyme that provides energy for the reaction.
C. It is the part of the enzyme that breaks down into amino acids.
What is the role of catalase in cells?
A. It breaks down starch
B. It breaks down hydrogen peroxide into oxygen and water.
C. It synthesises hydrogen peroxide.
D. It transports oxygen throughout the cell.
What is an enzyme?
A. A type of protein that increases the rate of a chemical reaction
B. A type of inorganic catalyst
C. A type of carbohydrate that provides energy
D. A type of lipid that stores genetic information
Why are enzymes important in all living organisms?
A. They help in the breakdown of large molecules
B. They increase the rate of chemical reactions
C. They provide energy for cellular processes
D. They store genetic information
What is the function of enzymes in biological processes?
A. To store genetic information
B. To speed up chemical reactions
C. To provide energy to cells
D. To transport oxygen
Which letter represents the product?
A. A
B. B
C. C
D. D
What is a substance called if it speeds up a chemical reaction?
A. reusable
B. catalyst
C. specific
D. fragile
How do enzymes catalyse substrates?
A. By increasing the temperature
B. By changing the pH
C. By binding to the active site
D. By providing additional energy
What is the reason for the drop in enzyme activity at temperatures above the optimum?
A. The activation energy increases
B. The substrate concentration decreases
C. The enzymes denature
D. The pH changes
How do enzymes increase the rate of a chemical reaction?
A. By providing additional reactants
B. By lowering the activation energy needed
C. By increasing the concentration of products
D. By breaking down the reactants
Proteins are synthesised in a cell at .
A. Nucleus
B. Mitochondria
C. Ribosomes
D. Vacuole
In the diagram, what is letter A?
A. product
B. substrate
C. enzyme-substrate complex
D. active site