ATP & Enzymes Worksheet
The energy needed to produce molecular collisions forceful enough to bring about a chemical reaction is called
_______________ _________.
Why is a catalyst necessary in the cell?
What does a catalyst do in a cell?
Are catalysts consumed by a reaction and, if not, can they be reused?
Of what material are almost all catalysts in the cell made? Carbohydrate, Lipid or Protein?
Coenzymes have a nonprotein part such as ____________ & ____________.
Can enzymes continue to function outside the cell?
Are catalyzed reactions reversible? If so, how; if not, why not?
What happens to an enzyme-catalyzed reaction if the temperature is raised moderately above its optimal temperature?
10. What happens to an enzyme-catalyzed reaction if the temperature is raised excessively above its optimal temperature?
11. What is true about the conditions under which enzymes function optimally?
12. ATP stands for ______________ _________________.
13. Describe the structure of ATP.
14. How many high-energy phosphate bonds does ATP contain?
15. Name the intermediate molecules formed as ATP is broken down.
16. Where does the energy to phosphorylate ADP to make ATP come from?
17. What is the energy provided by ATP used for?
18. Compare the amount of energy provided by aerobic cellular respiration to anaerobic respiration (fermentation).
19. How does activation energy relate to ATP?
20. How must the evolution of the first heterotrophs compare to the evolution of ATP? Which came first and why?
21. Carbohydrates are an important source of energy. How is this energy harnessed for use by the cell? (i.e. what changes occur
to a polysaccharide before its potential energy is used by the cells to do work, say, move a molecule across a membrane by
active transport, or cause muscle to contract.)
Mrs. Loyd 
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