Chapter 4- Photosynthesis

Question 1

Heterotrophs

Answer 1

-must get energy from the food they eat

Question 2

Autotrophs

Answer 2

-can make their own food.

Question 3

Photoautotrophs

Answer 3

-take light energy and convert it to chemical energy using photosynthesis

Question 4

Photosynthesis

Answer 4

• reduces atmospheric carbon dioxide
• releases oxygen
• creates chemical energy that can be transferred through food chains.

Question 5

Photons (light energy)

Answer 5

-are used to synthesize sugars (glucose) in photosynthesis

Question 6

Carbon fixation

Answer 6

• process in which inorganic (CO2) is converted into an organic molecule (glucose).
• powered by electrons released from photolysis by photosynthesis and excites them using solar energy.

Question 7

Photolysis

Answer 7

-splitting of water molecules

Question 8

Photosynthesis vs Cellular respirtion

Answer 8

• Photorespiration and cellular respiration are reverse processes
• Photosynthesis breaks down CO2 + H2O to produce O2 + Glucose.
• Photosynthesis is nonspontaneous and endergonic, producing glucose after input of solar energy
• Cell respiration is spontaneous and exergonic, breaks down glucose to generate energy in form of ATP.