http://www.ck12.org Chapter 9. Chemistry of Carbon
FIGURE 9.27
The human body produces many en-
zymes that help digest food. Here are just
two examples.- What types of organisms undergo photosynthesis?
- What is cellular respiration? Write the overall chemical equation for this process.
- Define enzyme, and give an example.
Apply Concepts
- Create a cycle diagram to show how photosynthesis and cellular respiration are related.
Think Critically
- Classify photosynthesis and cellular respiration as endothermic or exothermic reactions. Explain your classi-
fication.
Points to Consider
The enzyme pepsin works only in the presence of acid. A strong acid is secreted into the stomach. It provides the
acid that pepsin needs. You will learn about acids in the next chapter, "Chemistry of Solutions." Vinegar and lemon