Photorespiration

Question 1

Photorespiration is due to the

Answer 1

Divergence from the Calvin Cycle due to RuBisCo picking up O2 instead of CO2

Question 2

Photorespiration leads to the

Answer 2

Loss of an already fixed carbon into CO2

Question 3

Why is photorespiration bad?

Answer 3

It wastes energy and decreases sugar synthesis

Question 4

Photorespiration is caused by which situations?

Answer 4

More hot + dry

Question 5

Photorespiration begins in the chloroplast when

Answer 5

RuBisCo attaches O2 to RuBP

Question 6

What is the product when RuBisCo attaches O2 to RuBP?

Answer 6

3-PGA + phosphoglycolate

Question 7

What part of the leaf allows for air to enter the cell and water vapors to leave?

Answer 7

Stomata

Question 8

Photosynthetic process happens in the

Answer 8

Mesophyll

Question 9

C4 Plants have evolved past photorespiration by

Answer 9

Fixing carbons in cells exposed to air and later pumping the 4C molecule in leaf not exposed to O2

Question 10

First carbon fixation in C4 plants results in the formation of

Answer 10

A 4C molecule called Oxaloacetate

Question 11

Oxaloacetate further gets converted into either

Answer 11

Malate or Aspartate, which will react to produce CO2 + PEP

Question 12

PEP Carboxylase is an enzyme that can only fix

Answer 12

Carbon dioxide

Question 13

Malate gets transferred into bundle-sheath cells via

Answer 13

Plasmodesmata

Question 14

CAM Plants are

Answer 14

Desert plants, which keep stomata closed during the day

Question 15

How do CAM plants photosynthesize?

Answer 15

By keeping stomata open at night, fixing CO2 at night

Question 16

How can CAM plants photosynthesize in the daytime as well?

Answer 16

They use stored malate in vacuoles, which is pumped out into stroma