U3 AOS1 P4 Photosynthesis

Question 1

What is Photosynthesis?

Answer 1

Action of transforming light energy into chemical energy

Question 2

What organisms carry out Photosynthesis?

Answer 2

Plants, Algae, Some Bacteria and Some Protists

Question 3

What are the 2 INPUTS of Photosynthesis in the Equation?

Answer 3

Carbon Dioxide + Water

Question 4

What are the main 3 OUTPUTS of Photosynthesis in the Equation?

Answer 4

Glucose + Water + Oxygen

Question 5

What 2 things does Photosynthesis need to occur?

Answer 5

Chlorophyll and Light Energy

Question 6

What are Autotrophs?

Answer 6

Organisms that produce their own energy

Question 7

What are Heterotrophs?

Answer 7

Organism that absorbs food in the form of organic material obtained from their environment

Question 8

What is the WORDED formula of Photosynthesis?

Answer 8

Carbon Dioxide + Water ——-> Glucose + Water + Oxygen
chlorophyll
light energy

Question 9

What is the CHEMICAL formula of Photosynthesis?

Answer 9

6CO2 + 12H2O ——-> C6H12O6 + 6H20 + 6O2
chlorophyll
light energy

Question 10

What are 2 stages of Photosynthesis?

Answer 10

Light Dependant Stage and Light Independent Stage

Question 11

Where is chlorophyll found?

Answer 11

Chloroplasts

Question 12

Where does Light Dependant Stage occur?

Answer 12

Within the Grana of Chloroplasts (thylakoid membranes)

Question 13

Where does Light Independent Stage occur?

Answer 13

Stroma of Chloroplast

Question 14

What is the Oxygen produced from Photosynthesis used for?

Answer 14

Aerobic Respiration

Question 15

Why are leaves flat?

Answer 15

Have a larger surface area, meaning more chloroplasts have access to light energy

Question 16

What is a Stomata?

Answer 16

Pores on the underside of the leaf which CO2 enters. Water also leaves when they are open.

Question 17

What system transports water to photosynthetic cells?

Answer 17

Xylem

Question 18

What is the main function of Chloroplasts?

Answer 18

To trap energy from sunlight to be used in Photosynthesis

Question 19

What 3 things does Stroma contain?

Answer 19

Enzymes, Ribosomes and DNA

Question 20

What is chlorophyll?

Answer 20

Green pigment in plants which traps blue and red light energy

Question 21

What is Endosymbiosis?

Answer 21

Process which describes the origin of chloroplasts from the engulfment of cyanobacteria.

Question 22

“The cells and the cyanobacteria had a symbiotic relationship”, what does symbiotic mean?

Answer 22

Symbiotic refers to a relationship between at least two organisms have chosen to stay together to benefit each other

Question 23

What are 3 key points of evidence for the symbiotic theory?

Answer 23

1) Ribosomes of the Chloroplasts and the Cyanobacteria are similar
2) Cells cannot make new chloroplasts, so they therefore are not part of a cell
3) Chloroplasts have a double membrane, like the cyanobacteria

Question 24

What happens in the Light Dependent stage?

Answer 24

Sunlight is trapped by chlorophyll, and converted into chemical energy which is then used to split water molecules

Question 25

What happens in the Light Independent stage?

Answer 25

Glucose is formed from all the molecules supplied as the products of the several light dependant stages

Question 26

What is the Independent stage also known as?

Answer 26

The Calvin Cycle

Question 27

What 3 factors affect the Photosynthetic rate?

Answer 27

Amount of Light
Amount of Carbon Dioxide available
The temperature of the environment

Question 28

What are the 3 INPUTS of the Light Dependant Stage?

Answer 28

NADP+
ADP + P
H20

Question 29

What are the 3 OUTPUTS of the Light Dependant Stage?

Answer 29

NADPH
ATP
O2

Question 30

What are the 3 INPUTS of the Light Independant Stage?

Answer 30

CO2
NADPH
ATP

Question 31

What are the 4 OUTPUTS of the Light Dependant Stage?

Answer 31

NADP
C6H12O6
H2O
ADP + P