Question

cell energy phrases
directions: choose whether each phrase below best represents photosynthesis or cellular respiration. write the phrase in the appropriate column on your answer sheet.

occurs in plants and animals	uses food
occurs in mitochondria	adds carbon dioxide to the atmosphere
removes carbon dioxide from the atmosphere	adds oxygen to the atmosphere
reactants are glucose and oxygen	uses oxygen from the atmosphere
makes food	occurs in chloroplasts
uses carbon dioxide	produces carbon dioxide

| $\boldsymbol{c_6h_{12}o_6 + 6o_2 \
ightarrow 6co_2 + 6h_2o}$ | anabolic process (it builds complex molecules from simpler ones) |

uses a carbon atom in glucose to make carbon dioxide	uses carbon atoms from carbon dioxide molecules to make glucose
products are glucose and oxygen	energy source: sunlight
products are carbon dioxide and water	reactants are carbon dioxide and water
energy is released	energy is absorbed and stored
occurs in plants	energy source: glucose

| catabolic process (it breaks down complex molecules into simpler ones) | $\boldsymbol{6co_2 + 6h_2o \
ightarrow c_6h_{12}o_6 + 6o_2}$ |

Answer:

To solve this, we analyze each phrase and assign it to either Photosynthesis (PS) or Cellular Respiration (CR) based on their definitions:

Photosynthesis (PS) Key Features:

• Occurs in chloroplasts (plants/algae).
• Uses \( \ce{CO_2} \), \( \ce{H_2O} \), and sunlight.
• Produces glucose (\( \ce{C6H12O6} \)) and \( \ce{O2} \).
• Removes \( \ce{CO_2} \) from the atmosphere, adds \( \ce{O2} \).
• Anabolic (builds complex molecules).

Cellular Respiration (CR) Key Features:

• Occurs in mitochondria (plants and animals).
• Uses glucose (\( \ce{C6H12O6} \)) and \( \ce{O2} \).
• Produces \( \ce{CO_2} \), \( \ce{H_2O} \), and ATP (energy).
• Adds \( \ce{CO_2} \) to the atmosphere, uses \( \ce{O2} \).
• Catabolic (breaks down complex molecules).

Phrase-by-Phrase Assignment:

Phrase	Photosynthesis (PS) or Cellular Respiration (CR)?	Reason
Occurs in Mitochondria	CR	CR’s aerobic stage occurs in mitochondria.
Removes Carbon Dioxide from the Atmosphere	PS	PS uses \( \ce{CO_2} \) to make glucose, reducing atmospheric \( \ce{CO_2} \).
Reactants are Glucose and Oxygen	CR	CR’s equation: \( \ce{C6H12O6 + 6O2 -> 6CO2 + 6H2O + ATP} \).
Makes Food	PS	PS synthesizes glucose (food) from \( \ce{CO_2} \) and \( \ce{H_2O} \).
Uses Carbon Dioxide	PS	PS uses \( \ce{CO_2} \) as a reactant.
\( \ce{C6H12O6 + 6O2 -> 6CO2 + 6H2O} \)	CR	This is the chemical equation for aerobic CR.
Uses a Carbon Atom in Glucose to Make Carbon Dioxide	CR	CR breaks down glucose, releasing \( \ce{CO_2} \).
Products are Glucose and Oxygen	PS	PS produces glucose (\( \ce{C6H12O6} \)) and \( \ce{O2} \).
Products are Carbon Dioxide and Water	CR	CR’s products are \( \ce{CO_2} \) and \( \ce{H_2O} \).
Energy is Released	CR	CR breaks down glucose, releasing stored energy (ATP).
Occurs in Plants	PS (and CR)	PS is unique to plants (chloroplasts); CR also occurs in plants, but “Occurs in Plants” here likely refers to PS (since CR is in animals too).
Catabolic Process (breaks down complex molecules)	CR	CR breaks down glucose (complex) into \( \ce{CO_2} \) and \( \ce{H_2O} \) (simpler).
Uses Food	CR	CR uses glucose (food) for energy.
Adds Carbon Dioxide to the Atmosphere	CR	CR releases \( \ce{CO_2} \) into the air.
Adds Oxygen to the Atmosphere	PS	PS produces \( \ce{O2} \), increasing atmospheric \( \ce{O2} \).
Uses Oxygen from the Atmosphere	CR	CR uses \( \ce{O2} \) to oxidize glucose.
Occurs in Chloroplasts	PS	Chloroplasts are the site of PS.
Produces Carbon Dioxide	CR	CR generates \( \ce{CO_2} \) as a waste product.
Anabolic Process (builds complex molecules)	PS	PS builds glucose (complex) from \( \ce{CO_2} \) and \( \ce{H_2O} \) (simpler).
Uses Carbon Atoms from Carbon Dioxide Molecules to Make Glucose	PS	PS fixes \( \ce{CO_2} \) into glucose (Calvin cycle).
Energy Source: Sunlight	PS	PS directly uses sunlight to power reactions.
Reactants are Carbon Dioxide and Water	PS	PS’s equation: \( \ce{6CO2 + 6H2O ->[light] C6H12O6 + 6O2} \).
Energy is Absorbed and Stored	PS	PS absorbs sunlight and stores energy in glucose.
Energy Source: Glucose	CR	CR uses glucose (stored energy) to make ATP.
\( \ce{6CO2 + 6H2O -> C6H12O6 + 6O2} \)	PS	This is the chemical equation for PS.

Final Table (Example for One Phrase, Scaled to All):

For clarity, here’s a condensed table with assignments:

Phrase	PS / CR
Occurs in Mitochondria	CR
Removes Carbon Dioxide from the Atmosphere	PS
Reactants are Glucose and Oxygen	CR
Makes Food	PS
Uses Carbon Dioxide	PS
\( \ce{C6H12O6 + 6O2 -> 6CO2 + 6H2O} \)	CR
Uses a Carbon Atom in Glucose to Make Carbon Dioxide	CR
Products are Glucose and Oxygen	PS
Products are Carbon Dioxide and Water	CR
Energy is Released	CR
Occurs in Plants	PS
Catabolic Process	CR
Uses Food	CR
Adds Carbon Dioxide to the Atmosphere	CR
Adds Oxygen to the Atmosphere	PS
Uses Oxygen from the Atmosphere	CR
Occurs in Chloroplasts	PS
Produces Carbon Dioxide	CR
Anabolic Process	PS
Uses Carbon Atoms from \( \ce{CO2} \) to Make Glucose	PS
Energy Source: Sunlight	PS
Reactants are \( \ce{CO2} \) and \( \ce{H2O} \)	PS
Energy is Absorbed and Stored	PS
Energy Source: Glucose	CR
\( \ce{6CO2 + 6H2O -> C6H12O6 + 6O2} \)	PS

To complete the task, transfer each phrase to the “Photosynthesis” or “Cellular Respiration” column on your answer sheet using this breakdown.