C2 Photosynthesis Review

Question 1

During photosynthesis what to plants convert light energy into?

Answer 1

-During photosynthesis plants convert light energy into chemical energy (glucose)

Question 2

What are the 2 components that photosynthesis is broken down into?

Answer 2

1. Light dependant reactions: splits water and forms ATP (adenosine triphosphate)
2. Carbon fixation (light independant reactions) (Calvin-Bensen cycle): glucose is made

Question 3

What are chloroplasts?

Answer 3

-Site of photosynthesis
-have an inner and outer membrane

Question 4

What is the stroma?

Answer 4

-Fluid in the inner space of chloroplasts
-contains proteins and other chemicals used in the synthesis of carbohydrates (light dependant reactions in the thylakoid)
-light independent reactions happen in the stroma

Question 5

What is the thylakoid (membrane)?

Answer 5

-Flattened membrane sacs
-organized into stacks called grana or granum
-contain pigments which absorb light energy
-there are different photosynthetic pigments

Question 6

What is chlorophyll?

Answer 6

-Pigment that makes plants green
-main photosynthetic pigment in plants
-plants are green because chlorophyll reflects green wavelengths of light and absorb red and blue wavelengths

Question 7

What is the equation for photosynthesis?

Answer 7

-6H2O + 6CO2 —> C6H12O6 + 6O2

Question 8

What is carotenoids?

Answer 8

-Present in carrots
-absorb violet and blue wavelengths but reflect yellow and orange
-the different pigments absorb the wavelengths of light that provide the right amount of energy to the electrons within them

Question 9

What is photolysis?

Answer 9

-The process where water is split by light energy to produce hydrogen ions, oxygen atoms, and electrons
-O2 is a waste product of this process and is released by the plant