Photosynthesis

Question 1

Photosynthesis =

Answer 1

Building glucose using light

Question 2

Chemical formula for photosynthesis

Answer 2

6CO2 + 6H2O → C6H12O6 + 6O2

Question 3

Where does photosynthesis take place?

Answer 3

In the organelles called chloroplasts

Question 4

What is the Stroma?

Answer 4

Aqueous substance surrounding thylakoids containing enzymes for the Dark Reaction/Calvin Cycle

Question 5

What is the Thylakoids?

Answer 5

Structure containing chlorophyl pigments and enzymes for the light reaction

Question 6

What kind of organisms do photosynthesis?

Answer 6

plants, algae and some bacteria

Question 7

What is the overall purpose of photosynthesis?

Answer 7

To convert sunlight energy to chemical energy for it to feed plants

Question 8

What structure is used to transport organic molecules from the leaf to other parts of the plant?

Answer 8

Vascular bundle

Question 9

Why are leaves green?

Answer 9

Pigment in chloroplasts

Question 10

Where does the light reaction occur?

Answer 10

Thylakoids

Question 11

Where does the Calvin Cycle/Dark Reaction occur?

Answer 11

Stroma

Question 12

How does a plant increase its biomass?

Answer 12

Through the formation of new organic molecules

Question 13

What is the function of the photosystems?

Answer 13

Transform light energy to chemical energy. The absorption and transfer of light energy, which transfer electrons

Question 14

At the end of the electron transport chain, where is the light energy that was absorbed and converted by chlorophyl stored?

Answer 14

NADP+ + H → NADPH
OR
Recycled

Question 15

What two molecules bring chemical energy from the light reaction to the next stage of photosynthesis, the Calvin Cycle?

Answer 15

NADPH and ATP

Question 16

Describe how oxygen gas is produced during photosynthesis.

Answer 16

Water is split in grana. Oxygen is released out of the plant through stomata

Question 17

Describe how ATP is produced in the light reactions.

Answer 17

Protons inside the lumen diffuse out with the concentration gradient through ATP synthase. ATP synthase then uses the energy to combine ADP & P

Question 18

List the three major events that happened before photosynthesis is complete

Answer 18

1. Water splits and light is absorbed
2. Transform light energy to chemical energy (ATP, NADPH)
3. Uses chemical energy to make glucose

Question 19

What two distinct processes is photosynthesis grouped into?

Answer 19

1. Light Reaction
2. Calvin Cycle/Dark Reaction

Question 20

Does the light reaction require energy?

Answer 20

Yes

Question 21

Does the light reactions require carbon dioxide and water?

Answer 21

Yes it requires water but does not require carbon dioxide

Question 22

Where is the light energy transferred once the chlorophyl has absorbed it in the light reaction?

Answer 22

PSII and PSI

Question 23

As the light energy is absorbed, water splits into H ions and O ions.
a) where does the O go?
b) where does the H ions go?

Answer 23

a) out of the port through the stomata
b) stays in the thylakoid lumen to build up gradient

Question 24

The photosystems in the thylakoid membrane are connected by what?

Answer 24

ETC (electron transport chain)

Question 25

What purpose does the electron transport chain serve?

Answer 25

Move the electrons from one place to another

Question 26

What happens to the H+ ions in the light reaction?

Answer 26

They diffuse out of ATP synthase

Question 27

At what point has the light energy been converted to chemical energy?

Answer 27

At the end of the light reaction

Question 28

Where does the Calvin cycle take place?

Answer 28

Stroma

Question 29

What is the purpose of the Calvin cycle?

Answer 29

To create glucose

Question 30

Does the Calvin cycle require energy?

Answer 30

No

Question 31

Does the Calvin cycle require carbon dioxide and water?

Answer 31

Requires carbon dioxide but not water directly

Question 32

What does the Calvin cycle reaction use for fuel?

Answer 32

NADPH & ATP

Question 33

How does the Light Reaction connect with the Calvin Cycle?

Answer 33

The ATP and NADPH from the light reaction is used to make glucose in the next stage of photosynthesis, the Calvin cycle.