Cellular Respiration and Photosynthesis Worksheet
All organisms need energy to live. Plants get their energy from the sun to make ATP and sugar. Animals
have to eat plants (or other organisms) to get sugar to make ATP. This worksheet focuses on comparing and
contrasting the two processes of photosynthesis (making sugar) and cellular respiration (breaking down
sugar).
1. Below is a picture of a cell. Label the locations of the three major pathways involved in cellular
respiration.
2. Electron carriers play a major role in cellular respiration. What are the electron carriers and where
during the process of cellular respiration do they get their electrons (become reduced)?
3. Electron carriers are also important in photosynthesis. What is the electron carrier involved in
photosynthesis and when during the process of photosynthesis does it get its electron (become
reduced)?
4. Plants consume CO2 and produce O2 during photosynthesis. Cellular respiration consumes O2 and
produces CO2. When does both the consumption and production of O2 and CO2 occur in the
pathways?
a. CO2 is consumed during ___________________________________________
b. O2 is consumed during ____________________________________________
c. CO2 is produced during ____________________________________________
d. O2 is produced during _____________________________________________
CYTOSOL
MITOCHONDRION
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