# Final example

Rubisco is more likely to perform the oxygenase reaction during the night than during the day. T/F
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Terms in this set (22)
The mutant lacks starch.
Since phototropism is normal, things related to polar auxin transport and response must be functioning normally. Gravity is perceived by amyloplasts containing starch and this is something specific to gravitropism. Therefore, a defect in starch accumulation is the best answer.
False
Water can move in the xylem even when there is no transpiration because water can move between the phloem and xylem. Water exiting the phloem at the sink can enter the xylem and move to another location, likely the source since the source is where the phloem is loaded and water enters the phloem.
A decrease in the water potential around the guard cells.
Closing stoma will decrease transpiration. The one condition that does this is reducing the water potential around guard cells, which causes water to exit the guard cells and closing of the stoma. The change in ABA and solute potential in surrounding cells will not do this. Decreasing the water potential of the air will tend to increase transpiration.
- Glyceraldehyde 3-phosphate is produced by the reduction phase of the Calvin-Benson cycle.
- Glyceraldehyde 3-phosphate is more reduced than the 3-carbon compounds produced by Ribulose 1,5-bisphosphate carboxylase/oxygenase (rubisco).
- Some glyceraldehyde 3-phosphate is removed from the Calvin-Benson cycle and converted to starch or sucrose.