Photosynthesis Process - Reference to Notebook Annotations

Question 1

State first step of Light Dependant Stage

Reference to light

Answer 1

• Light enters thylakoid and it splits water into H+, e- and O2.
• This is called hydrolysis.

Question 2

State second step of Light Dependant Stage

Reference to oxygen

Answer 2

Oxygen diffuses out of the chloroplast and the leaf

Question 3

State third step of Light Dependant Stage

Reference to NADP+

Answer 3

The unloaded, low energy coenzyme NADP+ collects the electron (and H+) to become loaded, high energy coenzyme NADPH.

Question 4

State fourth step of Light Dependant Stage

Reference to what occurs with H+

Answer 4

The H+ flow through a channel in the thylakoid membrane

Question 5

State the fifth stage of Light Dependant Stage

Reference to what occurs due to flow of H+

Answer 5

The flow of H+ provides energy to enable the enzyme ATP Synthase to convert ADP+P to ATP. ATP is a high energy, loaded coenzyme.

Question 6

State sixth stage found in Light Independant Stage

Reference to what enters Stroma

Answer 6

Carbon Dioxide enters the stroma and with the help of enzyme rubisco, joins with RuBP to form a 6C compound.

RuBP stands for Ribulose 1-5 Bisphosphate

Question 7

State seventh stage found in Light Independant Stage

Reference to what happens to 6C compound

Answer 7

The 6C compound is unstable and spontaneously breaks into 2x3C compound (3-PGA)

Question 8

State eighth stage found in Light Independant Stage

Reference to what occcurs to 3-PGA

Answer 8

3-PGA is converted to G3P(3C) with the assistance of energy from NADPH and ATP

Question 9

State nineth stage found in Light Independant Stage

Reference to what happens to ADP+P and NADP+

Answer 9

ADP+P and NADP+ move back to the light dependant stage to pick up more matter and become loaded again. They cycle between the stages.

Question 10

State the tenth stage found in the Light Independant Stage

Reference to what happens to G3P

Answer 10

Some G3P are used to form Glucose which can now be sent to the mitochondria for cellular respiration. The rest of the G3P is used to reform RuBP with the energy from ATP. This keeps the cycle moving.

Question 11

State 4 factors that affect Photosynthesis

Answer 11

Light, Water, Carbon Dioxide and Temperature

Question 12

Explain how light affects Photosynthesis

Answer 12

Light is needed to split water, producing more H+ and e-. H+ and e- produce ATP and NADPH which are needed for glucose formation.

Question 13

Explain how Water affects Photosynthesis

Answer 13

Water is the source of H+ and e-, which are needed to produce ATP and NADPH which eventually are involved in glucose formation

Question 14

Explain how Carbon Dioxide affects Photosynthesis

Answer 14

CO2 is needed for the light independant stage to help form Glucose

Question 15

Explain how temperature affects Photosynthesis

Answer 15

Photosynthesis is enzyme controlled and so is affected by temperature like any other enzyme controlled reaction.

Question 16

What are the pores on a leaf through where gasses exit and enter called?

Answer 16

Stomata

Question 17

What is the green substance that captures light in leaves called?

Answer 17

Chlorophyll