Photorespiration

Question 0

Overall Photorespiration Process locations

Answer 0

Chloroplast –> Peroxisome –> Mitochondrion –> Peroxisome –> Chloroplast

Question 1

Photorespiration

Answer 1

Rubisco binds O2 to RuBP in place of CO2

Question 3

C3 Photorespiration process (Down)

Answer 3

Glycine (2C) + Glycine (2C) -> -CO2 -> Serine (3C) {All in the Mitochondrion}

Question 4

C3 Photorespiration Process (Bottom)

Answer 4

Serine (3C) (Mitochondrion) –>
Serine -> Hydroxypyruvate -> Glycerate (Peroxisome) –>
{ATP–>ADP} 3-PGA (Chloroplast)

Question 5

The Photorespiration Process Creates…

Answer 5

less sugar and uses more energy

Question 6

C4 Plants:

Answer 6

Calvin Cycle occurs WHERE O2 is excluded

Question 7

The 2 Cells invovled:

Answer 7

Mesophyll and Bundle Sheath Cell (BSC)

Question 8

Bundle Sheath Cell (BSC)

Answer 8

• Suberized (surrounded by suberin)
• CO2 released at rubisco
• No PSII in BSC

Question 9

C4 Process Diagram

Answer 9

CO2 into
MESOPHYLL CELL–> CO2 + PEP (3C) -PEP Carboxylase Enzyme–> oxaloacetate (4C) -converted–> Malate (4C)
BSC–> Malate –> CO2 or Pyruvate (CO2 -> Calvin Cylce)
Pyruvate –> back to PEP in MESOPHYLL

Question 10

CAM Plants

Answer 10

Crassulacean Acid Metabolism

• Named from Crassulaceae family
• Temporal separation of O2 and rubisco

Question 11

CAM plants @ Night:

Answer 11

Stomata open

CO2 molecules converted by specialized enzyme to 4C compound

Question 12

CAM Plants Day:

Answer 12

CO2 released at rubisco

Question 13

CAM Process

Answer 13

CO2 into
NIGHT–> CO2 + PEP (3C) -PEP Carboxylase Enzyme–> oxaloacetate (4C) -converted–> Malate (4C)
DAY–> Malate –> CO2 or Pyruvate (CO2 -> Calvin Cylce)
Pyruvate –> back to PEP

Question 14

C3 Photorespiration Process (Top)

Answer 14

O2 binds–> Phosphoglycolate (in Chloroplast) –>
Glycolate -> Glyoxylate -> Glycine (In Peroxisome) {2C compounds} –>
Glycine (in Mitochondrion)