Light Dependant and Independant (Dark) Reactions

Question 1

Light _________ Reactions
-The clustered arrangement of pigments in Thylakoids
-Contains two Photosystems
-All absorbed sunlight energy is passed to a reaction centre

Answer 1

Light Dependant Reactions

Question 2

Each PS (Photosystem) has about __ Chlorophyll molecules and a few carotenoids and a molecule that accepts electrons.

Answer 2

12

Question 3

In Light Dependant Reactions, all absorbed sunlight energy is passed to a specialized electron-accepting Chlorophyll a molecule called the..

Answer 3

Reaction Centre

Question 4

What happens when energy (e-) is passed from the other pigments to the reaction centre?

Answer 4

it becomes “excited” / the electrons have been raised to a higher energy level

Question 5

What happens when electron (e-) is passed from the reaction centre to the electron accepting molecule?

Answer 5

it becomes reduced (gains an electron) and has a higher energy level

Question 6

the splitting of water

Answer 6

Photolysis

Question 7

What does Photolysis produce?

Answer 7

electrons, oxygen, and hydrogen ions (H+)

Question 8

How are electrons produced for Light Dependent Reactions?

Answer 8

Electrons are produced by the splitting of water (Photolysis)

Question 9

The energized electron is passed through a series of electron carrying molecules called..

Answer 9

Electron Transport Chain (ETC)

Question 10

As the electron is passed to electron acceptors, it falls to a _____ energy state.

Answer 10

Lower

Question 11

The released energy pushes __ ____ from the Stroma into the inner Thylakoid space.

Answer 11

H+ Ions

Question 12

The pushed H+ from the released energy creates a..

Answer 12

Concentration Gradient

Question 13

Provides a “push” to regenerate ATP from ADP + P

Answer 13

Concentration Gradient

Question 14

As H+ move down the concentration gradient, it drives the reaction that generates ___.

Answer 14

ATP

Question 15

Creating ATP using H+ concentration gradient

Answer 15

Chemiosmosis

Question 16

Using light to make ATP (adding P to ADP)

Answer 16

Photophosphorylation

Question 17

The electron from PSI is used to reduce NADP+ into..

Answer 17

NADPH

Question 18

The reducing power (NADPH) will be used in..

Answer 18

Light Independent Reactions

Question 19

An electron from _____ replaced the electron that was lost from PSII

Answer 19

water

Question 20

The oxygen from the water molecule is converted to molecular ______.

Answer 20

Oxygen (O2)

Question 21

Light Dependant Reaction happens in the..

Answer 21

Thylakoids

Question 22

Reaction Center is full of..

Answer 22

Chlorophyll!!!!!!!

Question 23

Light ___________ Reactions
-Series of reactions that “fixes” atmospheric CO2 into Glucose.
-If sufficient NADPH and ATP in the stroma, the energy of these molecules can be used to synthesize Glucose in the presence or absence of Light

Answer 23

Independent

Question 24

five-carbon compounds

Answer 24

RuBP

Question 25

Dark Reaction takes place in the..

Answer 25

Stroma

Question 26

6 carbon chain

Answer 26

Carbon Fixation

Question 27

Three-Carbon Chains with low energy

Answer 27

PGA

Question 28

Three Carbon Chain with high energy

Answer 28

PGAL

Question 29

Energy released during ETC forces __ across the thylakoid membrane and create a concentration gradient.

Answer 29

H+

Question 30

Energy from the concentration gradient is used to generate ATP from ADP and P by means of..

Answer 30

Chemiosmosis

Question 31

Series of reactions that “fixes” (adds) atmospheric CO2 into Glucose

Answer 31

Light Independent Reaction

Question 32

If sufficient _____ and ___ in the Stroma, the energy of these molecules can be used to synthesize glucose in the presence or absence of light

Answer 32

NADPH and ATP

Question 33

What are the steps of Dark Reaction?

Answer 33

1. Carbon Fixation 2. Reduction 3. Replacing RuBP

Question 34

What are the steps of light reaction?

Answer 34

1. Photolysis and PSII 2. Electron Transport Chain (ETC) 3. PSI 4. Reducing Power

Question 35

What is carbon fixation?

Answer 35

When C atom from CO2 binds to a pre-existing 5 carbon molecule RuBP

Question 36

New 6 Carbon from Carbon Fixation is ________ and quickly breaks down into 2 x 3C PGA molecules

Answer 36

Unstable

Question 37

Reduction = ??

Answer 37

Charge up

Question 38

The new 3 carbon molecules are in a ___ energy state

Answer 38

Low

Question 39

The new PGA molecules are activated by ATP then Reduced by..

Answer 39

NADPH

Question 40

How many PGAL leave the cycle to make Glucose?

Answer 40

One!!!

Question 41

The remaining _ PGAL stays in the cycle

Answer 41

Five!!!

Question 42

ATP produced from the light dependant reactions breaks and reforms the 3 carbon PGAL into 5 Carbon..

Answer 42

RuBP

Question 43

What is the enzyme that fixes carbon?

Answer 43

Rubisco