Question

1. the light - dependent reaction produces some atp, but that atp is not available to do work other than power the calvin cycle. how do you think a plant cell produces the atp it needs to do other cellular work, such as biosynthesis of proteins, transport of materials across the membrane and cell division?
2. fill in the boxes labeled in the flow chart (right) using the following terms: cellular respiration, chlorophyll, co₂, mitochondria, photosynthesis, c₆h₁₂o₆, chloroplast, sunlight
3. when plants photosynthesize, the concentrations of various molecules change within the cells. these concentrations can be monitored and graphed. in complete sentences, explain what the shape of each line on the figure below indicates is happening in the cell.

a. carbon dioxide
b. oxygen
c. ribulose bisphosphate (rubp)

Explanation:

Step1: Answer question 9

Plant cells produce ATP for other cellular work through cellular respiration. In cellular respiration, glucose is broken - down in the mitochondria to produce ATP.

Step2: Fill in flowchart for question 10

a. Sunlight provides energy for photosynthesis (b). Photosynthesis occurs in chloroplasts (c). Chloroplasts contain the pigment chlorophyll (e). Photosynthesis produces oxygen and glucose ($C_6H_{12}O_6$) (d). Carbon dioxide ($CO_2$) provides carbon for photosynthesis (f). Cellular respiration occurs in mitochondria (h) and uses oxygen and glucose to produce ATP (g).
So, a: Sunlight; b: Photosynthesis; c: Chloroplast; d: $C_6H_{12}O_6$; e: Chlorophyll; f: $CO_2$; g: Cellular respiration; h: Mitochondria

Step3: Answer question 11 - Carbon dioxide

During photosynthesis, carbon dioxide is taken up by the plant cells. So, the concentration of carbon dioxide decreases over time as it is used in the Calvin - cycle of photosynthesis.

Step4: Answer question 11 - Oxygen

During photosynthesis, oxygen is produced as a by - product. So, the concentration of oxygen increases over time as more oxygen is released into the cell.

Step5: Answer question 11 - Ribulose bisphosphate (RuBp)

RuBp is a key molecule in the Calvin cycle. As photosynthesis proceeds, RuBp is used up to fix carbon dioxide, so its concentration initially decreases. But as the cycle continues and more RuBp is regenerated, its concentration may show a more stable or slightly fluctuating pattern.

Answer:

1. Plant cells produce ATP for other cellular work through cellular respiration in mitochondria where glucose is broken down.
2. a: Sunlight; b: Photosynthesis; c: Chloroplast; d: $C_6H_{12}O_6$; e: Chlorophyll; f: $CO_2$; g: Cellular respiration; h: Mitochondria

11.
a. The concentration of carbon dioxide decreases over time as it is used in photosynthesis.
b. The concentration of oxygen increases over time as it is produced in photosynthesis.
c. The concentration of RuBp initially decreases as it is used in the Calvin - cycle and may show a fluctuating pattern as it is regenerated.