Carbon reaction

Three phases of Calvin cycle are

• Reduction

• Carboxylation

• Regeneration

• Oxygenation

Three molecules of RuBP will fix with 3 molecules of CO2 to produce 6 molecules of ____________

• fructose-1,6-bisphosphate

• glyceraldehyde-3-phosphate (G3P)

• 3-phospholglycerate (3-PG)

• Dihydroxyacetone-3-phosphate (DHAP)

The C2 oxidative photosynthetic carbon cycle occurs in these organelles:

• peroxisome

• mitochondria

• chloroplast

• Golgi bodies

Photorespiration can happen during hotter days because

• Rubisco has a higher affinity towards carbon dioxide

• Stomatal closure limits the uptake of carbon dioxide

• Transpiration rate is higher

• Stomatal closure limits the uptake of oxygen

C3 photosynthesis is not efficient during hotter days because

• PEP carboxylase will be used to fix CO2

• It produces 3-phosphoglycerate and 2-phosphoglycolate

• More CO2 will be fixed

• Rubisco fixed with oxygen and cause photorespiration

CO2-concentrating mechanism is important because:

• to decrease the affinity of Rubisco to carbon dioxide

• to ensure the concentration of CO2 is higher for the fixation stage in the Calvin cycle

• to increase the affinity of Rubisco to oxygen

• to produce more RuBP

The C4 plants have specialized leaf anatomy known as

(a)  

C4 plants use this enzyme to fix the bicarbonate ion

• Carbonic anhydrase

• Malate dehydrogenase

• PEP carboxylase

• Rubisco

In CAM plants, malic acid will be converted to malate during the day time and increase the production of starch

• TRUE

• FALSE

End products of photosynthesis are

• Fructose

• Sucrose

• Starch

• Maltose