Chapter 6

Question 1

P/S takes ___________ coverts it to ___________ as sugar

Answer 1

Light energy
Potential energy

Question 2

Chemical summary of P/S

Answer 2

6CO2 + 12 H2O + light energy = 2(C3H6O3) + 6 H2O + 6O2

Question 3

Two phases of P/S

Answer 3

Light dependant- light capture
Light independant- caron fixation

Question 4

3 steps of light dependant aka
3 reactions

Answer 4

Light is absorbed by pigments
Light energy electrons is transported ETC
Products are made ( ATP NADPH) O2 by product

Question 5

Groups of light absorbing pigments gathered together is a (cluster of several hundred)

Answer 5

Photosystem

Question 6

Pigment used in P/S

Answer 6

Chlorophyll

Question 7

Any chemical that can absorb photos of light.

Answer 7

Pigment

Question 8

Where do electrons gather to be ejected

Answer 8

Reaction Center

Question 9

ETC lose energy as they trans port e- and create

Answer 9

ATP + NADPH

Question 10

When is oxygen made

Answer 10

At the end of light capture phase

Question 11

What is the light Independent phase aka

Answer 11

Carbon fixation
Calvin cycle
Sugar making

Question 12

In the light Independent phase CO2 is used to build

Answer 12

Sugar

Question 13

How are electrons replenished after they leave photo system

Answer 13

They are taken from water. hydrogen protons H+ and O2 are released

Question 14

What is G3P

Answer 14

Glyceraldehyde three phosphate
Is the endpoint of P/S.

Question 15

What are the three phases of the Calvin Cycle

Answer 15

Carbon up take
Reduction
Regeneration

Question 16

What happens during carbon uptake

Answer 16

3CO2 grabbed and added to RUBP (5carbon) from Regeneration phase

Question 17

What happens during Reduction phase

Answer 17

Add electrons from ATP and NADPH to make 6 G3P (reduced three carbon sugar) 1 G3P leaves 5 move to regeneration

Question 18

What happens during Regeneration phase

Answer 18

1 G3P exits and remaining 5 mix with phosphate from ATP to make RUBP then the cycle repeats

Question 19

In hot conditions plants close their stomata causing CO2 and O2 to stop diffusing and what occurs

Answer 19

Photorespiration

Question 20

Photorepiration

Answer 20

RuBisCO affixes oxygen and produces CO2 and makes Calvin Cycle less effective. Make glycolate instead of glycerate

Question 21

How do C4 plants deal with photorespiration.

Answer 21

They fix 4 carbons in
Oxaloacetate to malate in mesophyll layer making CO2 and pyruvate. CO2 goes into the Calvin Cycle