QUESTION 1 Name three cell structures or organelles unique to plants. QUESTION 2

Question

QUESTION 1

Name three cell structures or organelles unique to plants.



QUESTION 2

What is the primary function of the Calvin cycle (dark reactions)?

a- use ATP to release carbon dioxide

b- use NADPH to release carbon dioxide

c- split water and release oxygen

d- synthesize simple sugars from carbon dioxide

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QUESTION 3

The following two experiments are conducted using a heavy oxygen isotope (18O ) as a tracer in either H20 or CO2.  

Experiment 1: A photosynthesizing plant is supplied with with H218O  and CO2.

Experiment 2: A photosynthesizing plant is supplied with with H2O  and C18O2.

Which experiment will produce 18O2?

a- Experiment 1

b- Experiment 2

c- Both experiments

d- Niether experiment

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QUESTION 4

Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?

a- CO2 and glucose

b- H2O and O2

c- ADP and NADP+

d- ATP and NADPH

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QUESTION 5

Photorespiration occurs when rubisco catalyzes a reaction between  

a- use ATP to release carbon dioxide

b- use NADPH to release carbon dioxide

c- split water and release oxygen

d- synthesize simple sugars from carbon dioxide

Explanation / Answer

1. chloroplast, cell wall, vacoule.

2. d, 3. a, 4. d, 5. b, 6. a, 7. cyclic photophosphorylation, non-cyclic photophosphorylation, light reaction, 8. well watered plants willhave lower stomatal conductance than water stressed plants.As the amount of water lost through transpiration is largely dependent on stomatal aperture, CO2enrichment can result in maintenance of higher leaf water potentials.

9. d,

10. No. Seedling RGR was not correlated with light-saturated net photosynthetic rate, but was strongly correlated with the net carbon balance estimated, from photosynthetic light-response curves, considering daily variation in irradiance.

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