Ch.9

Question 1

6H2O + 6CO2 + energy(photons) —–> C6H12O6 + 6O2

What process does the chemical equation describe?

Answer 1

Photosynthesis

Question 2

Where does all the O2 of photosynthesis come from?

Answer 2

oxidation of water

Question 3

In the photosynthesis chemical equation what does CO2 get reduced too?

Answer 3

Glucose

Question 4

What causes algal blooms?

Answer 4

nutrients (usually phosphorus)
Temperature

Question 5

Why can algal blooms be a problem?

Answer 5

Production of toxic compounds
Oxygen consumption by algae and bacteria feeding on dead algae

Question 6

Where does photosynthesis take place in Eukaryotes?

Answer 6

Chloroplasts

Question 7

Where does photosynthesis take place in prokaryotes?

Answer 7

Internally folded membrane

Question 8

TF:
Atoms can absorb the energy of photons

Answer 8

T

Question 9

TF:
Atoms can give off photons

Answer 9

T

Question 10

TF:
Only certain atoms and molecules absorb certain types of photons

Answer 10

T

Question 11

Which molecules absorb the photons?

Answer 11

Pigments

Question 12

What is emitted after an electron leaves the higher energy state and returns to it’s original state?

Answer 12

Photon

Question 13

What is the pigment involved in photosynthesis tha absorbs blue and red light?

Answer 13

Chlorophylls

Question 14

What can absorb photons of wavelenths that chlorophyll can’t and passes the light energy off to chlorophyll?

Answer 14

Accessory pigments

Question 15

Can pigments that chlorophyll can’t absorb be used in photosynthesis?

Answer 15

Yes

Question 16

Two different stages in photosynthesis

Answer 16

Light reactions
Dark reactions

Question 17

Why is the light energy transferred to electrons in light reactions of photosynthesis

Answer 17

To be used to make ATP and high energy electron source

Question 18

What happens in Dark reactions

Answer 18

CO2 is reduced to a carbohydrate

Question 19

What happens once the energy from electrons is directed towards cholorophyll

Answer 19

Energy of electrons in chlorophyll is increased and causes them to be lost from the chlorophyll molecule

Question 20

In photosystem II what are the electrons lost from chlorophyll replaced with?

Answer 20

electrons from H2O

Question 21

What are electrons passed down?

Answer 21

Electron transport chain

Question 22

What happens to the H+ ions

Answer 22

Actively transported accross the membrane

Question 23

Where are the H+ ions transported from and to

Answer 23

From the Stroma in to the thylacoid compartment

Question 24

TF:
Photosystem II is involved in more than one process

Answer 24

F:
Photosystem II is only involved in ATP production

Question 25

How does H+ pass back in to the stoma in Photosystem II?

Answer 25

ATP synthase

Question 26

What happens to the electrons at the end of the electron transport chain of Photosystem II?

Answer 26

They are passed on to Photosystem I

Question 27

What are the two paths that excited electrons can take?

Answer 27

Cyclic Non cyclic

Question 28

What happens to an electron that takes the cyclic path in Photosystem I

Answer 28

They travel through an electron transport chain back to photosystem I

Question 29

What does the cyclic path produce?

Answer 29

ATP

Question 30

What process does the cyclic path use to create ATP

Answer 30

Chemiosmosis

Question 31

What happens to electrons in the Non cyclic path?

Answer 31

They are passed to an electron carrier

Question 32

What is the electron carrier used in the non cyclic path?

Answer 32

NADP+

Question 33

What are the 3 phases of the Dark Reactions

Answer 33

Carbon fixation Reduction Regeneration

Question 34

What does carbon combine with in the carbon fixation phase?

Answer 34

5 Carbon sugar

Question 35

What happens once carbon has attached itself to the sugar molecule?

Answer 35

It splits in to 2 molecules

Question 36

In the reduction phase what are donated to 3 Carbon molecules and what donates them?

Answer 36

Electrons are donated from NADPH

Question 37

In the reduction phase, what happens to one of the 3 carbon products?

Answer 37

Used to produce glucose

Question 38

In the Regeneration phase, what happens to one of the 3 carbon compounds? And does it require energy? if so, what is the name of the energy required?

Answer 38

It is used to make a new RuBP, it requires ATP

Question 39

What is the name of the Balance between light and dark reactions?

Answer 39

Photostasis

Question 40

TF: Organisms build photosynthetic systems to balance light and dark reactions

Answer 40

True

Question 41

What happens to reaction centers in photostasis if they remain reduced?

Answer 41

They will be damaged

Question 42

What reactions are temperature sensitive?

Answer 42

Dark reactions

Question 43

What two measures can be taken to compensate for a change in temperature?

Answer 43

Change in pigment Reduce their chlorophyll levels

Question 44

What happens to plants when they take in CO2?

Answer 44

lose water

Question 45

What part of the plant regulates gas exchange in leaves?

Answer 45

Stomata

Question 46

TF: The stomata prevents water loss

Answer 46

True