Enzyme Quiz
  • 1. A catalyst will make a reaction
A) go in different directions
B) slow down
C) stop
D) speed up
  • 2. A cell contains
A) one kind of enzymes that promotes thousands of different chemical reactions
B) approximately 100 kinds of enzymes, each promoting a different chemical reaction
C) thousands of different enzymes, each prompting a different reaction
D) one enzyme that promotes photosynthesis and one enzymes that promotes cellular respiration
  • 3. After the enzyme amylase break down a starch molecule, it can
A) not be reused
B) change its shape to adapt to different reactant
C) break down more starch molecules
D) alter equilibrium conditions
  • 4. An animal’s stomach contains enzymes that break down food into smaller molecules that the animal’s cells can use. Enzymes perform this function by
A) increasing the temperature
B) changing the ionic concentration
C) lowering the pH
D) participating in chemical reactions
  • 5. At high temperatures, the rate of enzyme action decreases because the increased heat
A) alters the active site of the enzyme
B) increases the concentration of the enzyme
C) neutralizes the acids and bases in the system
D) changes the pH of the system
  • 6. Cells must produce many different enzymes because
A) most cellular reactions require a specific, unique enzyme
B) they have to have some way to use up the protein that they consume
C) enzymes are quickly used up
D) they have to have some way to use up the protein that they consume
  • 7. Enzymes depend on their structure to function properly. Which of the following does not alter an enzyme’s structure?
A) concentration of reactants
B) pH
C) temperature
D) ionic conditions
  • 8. Enzyme names always end with the suffix
A) -ose
B) -ase
C) -ene
D) -ite
  • 9. Enzymes
A) all choices are correct
B) are affected by temperature and pH
C) are proteins
D) speed up chemical reactions
  • 10. Enzyme influence chemical reactions in living systems by
A) affecting the rate at which reactions occur
B) absorbing water released when polymers are formed
C) combining with excess hydrogen to form gaseous wastes
D) providing the substrate required for the reaction to occur
  • 11. Enzymes affect the reactions in living cells by changing the
A) speed of the reaction
B) temperature of the reaction
C) products of the reaction
D) pH of the reaction
  • 12. In an experiment you find that high temperatures reduce enzyme activity. This result is most likely due to the effect of high temperature on the
A) function of the reactants
B) structure of the enzyme
C) pH of the environment energy required
D) amount of activation
  • 13. Proteins that reduce the amount of energy needed to start a chemical reaction are called
A) ions
B) reactants
C) sugars
D) enzymes
  • 14. Which aspect of a chemical reaction is affected by enzymes?
A) direction
B) pH
C) rate
D) equilibrium
  • 15. The majority of human enzymes are most effective
A) within a limited pH range
B) at low temperatures
C) in a high-saline environment
D) under low pressure
  • 16. The amount of energy required for a chemical reaction to begin is called
A) electrical energy
B) chemical energy
C) activation energy
D) mechanical energy
  • 17. The fact that amylase in the human small intestine works best at normal body temperature (37 degrees C) suggests that
A) amylase is denatured at temperature below 37 degrees C
B) amylase can function only in the small intestine
C) the optimum temperature for amylase is 37 degrees C
D) the lock-and-key model of enzyme action does not apply to amylase
  • 18. The molecule on which an enzyme acts is called a(n)
A) inactive site
B) organic molecule
C) substrate
D) active site
  • 19. The part of the enzyme where the substrate binds is known as the
A) activation energy
B) catalyst
C) inhibitor
D) active site
  • 20. Many different enzymes are located in a cell's cytoplasm. How does an enzyme knows which protein it has to work with?
A) different enzymes are made in specific areas of the cytoplasm
B) enzymes can only bind to specific substrates
C) most enzymes can catalyze many different reactions
D) enzymes are sent to specific substrates by ribosomes
  • 21. The “lock and key hypothesis” attempts to explain the mechanism of
A) . pinocytosis
B) vacuole formation
C) enzyme specificity
D) sharing of electrons
  • 22. The various enzymes in our bodies are
A) proteins
B) lipids
C) nucleotides
D) carbohydrates
  • 23. Since enzymes are biological catalysts, they
A) raise the activation energy until a reaction begins
B) permanently blind to reactants, allowing a reaction to occur
C) prevent reactions from occurring spontaneously
D) require activation energy for a reaction to occur
  • 24. Which chemical is classified as an enzyme?
A) protease
B) galactose
C) lipid
D) manganese dioxide
  • 25. Which factor does not alter the rate of hydrolysis of maltose, a disaccharide?
A) pH of the environment of the reaction
B) size of the substrate molecule
C) temperature of the environment of the reaction
D) number of enzyme molecules present
Azok a diákok, akik elvégezték ezt a tesztet, szintén elvégezték :

Létrehozva That Quiz — a matematika teszt generáló webhely más tantárgyi forrásokkal.