Chapter 10- Photosynthesis

Question 1

What is the chemical equation of photosynthesis

Answer 1

6 CO2 + 12 H2O + Light Energy = C6H12O6 + 6O2

+ 6H2O

Question 2

What molecules derive O2

Answer 2

H2O

Question 3

What products does CO2 yield

Answer 3

Carbohydrates and Water

Question 4

What are the products of the light reaction

Answer 4

NADPH and ATP

Question 5

What is a photosystem composed of?

Answer 5

reaction-center complex that is surrounded by light harvesting complexes

Question 6

What is the reaction-center complex?

Answer 6

proteins holding a special pair of chlorophyll a molecules and a primary electron acceptor.

Question 7

Explain the process of linear electron flow

Answer 7

a photon of light hits one of the pigment molecules and boost its electron to a higher energy level that is given to the primary electron acceptor. Then water is split to replace the electrons that the P680 lost. The excited electrons passes to the PS II to PS I by Pq and Pc. Once at the PS I, it excites the P700 electron that is given to the primary electron acceptor and passes it down to the Fd to reduce NHADP+ to NADPH

Question 8

Explain the process of Cyclic Electron Flow and its purpose

Answer 8

The electron from PSI is circled back to the cytochrome complex then to the Pc to the Photosystem I’s primary acceptor. This generates a lot of ATP

Question 9

Which process generates ATP in the chloroplast and mitochondria

Answer 9

chemiosmosis

Question 10

Explain how the mitochondria generates ATP

Answer 10

Water is spit by PS II and as the Pq transfers the electrons to Pc, four protons are shuttled into the cytochrome complex. Then PS I transfers its electron to Fd and NADP + is reduce to NADPH. The four protons shuttle in and the protons from the splitting water is sent to ATP synthase to produce more ATP

Question 11

What is the purpose of the Calvin Cycle

Answer 11

to synthesize sugar from CO 2

Question 12

What is the three carbon sugar the Calvin cycle produces?

Answer 12

Glyceraldehyde -3-phosphate (G3P)

Question 13

Explain the process of the calvin cycle

Answer 13

The carbon form CO2 is fused with RuBP by an enzyme rubisco. This becomes two 3PPG and is phsphoralated to yield 1,3 BPG then is reduce to G3P. One molecule of G3P is used to make glucose while the other 5 is recycled to RuBP by being phosphorylated.

Question 14

Which plants uses rubisco

Answer 14

C3

Question 15

What do C4 plants yield in the carbon cycle

Answer 15

four carbon compound

Question 16

How do C4 plants fix carbon

Answer 16

CO2 is fused with Pep by PEP carboxylase in the mesophyll cells then is converted to malate from oxaloacetate and is transported to the bundle sheath cell through the plasmodesma. CO2 is released from the malate and is convert to pyruvate and them PEP by ATP. fThe Co2 is used in the Calvin cycle and the PEP is recycle into the C4 pathway.

Question 17

How are CAM plants different from C4 plants

Answer 17

CAM fixes their carbon at night then goes through the calvin cycle during the day all within the same cell. C4 fixes carbon in the mesophyll cell then goes through the calvin cycle in the bundle sheath cells.