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What are the electron sources for the two electron transportchains of the light reactions (light and dark reactions)?

I think it is Photosynthesis I and II. This isfrom the study guide for my final exam coming up. Please help me beable to answer this question correctly. Is my answers correct? Ifnot please provide an explaination with a correct answer.
Thank You!

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Hubert Koch
Hubert KochLv2
29 Sep 2019

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Hi, I need help with this question. Please and thank you

20 Petri dishes of radish seeds are prepared as follows: each Petri dish receives with a disk of absorbent, but otherwise inert, filter paper and 5 mL of distilled water are added to each disk, then 2 grams of dry radish seeds are spread over each moist disk. 10 dishes are put in a dark cupboard and the other 10 are put on a sunny windowsill. The investigator checks the dishes daily and adds water equally as needed. Seeds in both treatments germinate within 2 days. At the end of 10 days, the plant material on each Petri plate is dried and weighed. The results are:
•Average sunny windowsill dry weight: 2.25 g
•Average dark cupboard dry weight: 1.75 g
**Question consists of three parts**

(1) Which of the following correctly lists the independent and dependent variables for this experiment?
A. Independent: Sun.
Dependent: Shade
B. Independent: Amount of light.
Dependent: Plant weight
C. Independent: Plant weight.
Dependent: Amount of water
D. Independent: Amount of water
Dependent: Plant weight

(2) What is the best explanation for why the dark grown seedling lost biomass?
A. The metabolism in the cells of the seeding in the dark increased to compensate for the lack of light energy
B. Cellular respiration needed for growth does not occur as efficiently in plants in the dark as in plants exposed to light
C. Cellular respiration in the cells of the seedlings consumed the starch and oils present in the seeds as sources of energy
D. The seeds in the dark decomposed

(3) What is the best explanation for why the light-grown seedlings gained biomass?
A. Cellular respiration converted chemical energy stored as starch into chemical bind in ATP
B. Photosynthesis converted sunlight to biomass
C. The seeds in the light absorbed oxygen and gained weight
D. Photosynthesis reduced carbon dioxide to glucose




1)What are the inputs of photosynthesis?

2)What are the outputs of photosynthesis?

3)Light-Dependent Reactions

Where does the first stage of photosynthesis, the light-dependent reactions, occur within a chloroplast?

Where does the energy come from that drives these reactions?

What molecule donates an electron to the reaction center of photosystem II?

How is the energy of an electron changed as it moves along the ETC?

How does the electrical charge of the thylakoid membrane affect protons (H+) within the chloroplast?

Where does the electron that is donated to photosystem I come from?

What are the final products of this series of reactions?

What happens to each of the final products from this series of reactions?

4)Light-Independent Reactions (Calvin Cycle)

a.Where does the second stage of photosynthesis, the Calvin Cycle, occur within a chloroplast?

b.What are the direct inputs for these reactions?

c.What are the three steps to the Calvin cycle?

d.What are the final products of this reaction?

e.What role does rubisco play in the Calvin Cycle?

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a.Understand the materials and scientific techniques used to come to this result.

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b.The results revealed that DNA replicates using which of the three proposed models?

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3)What is the role of the following proteins in DNA replication?

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d.DNA polymerase III

e.DNA polymerase I

f.Primase

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a.What is the role of telomerase in these “steps”?

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2)Does mitosis create a cell that is different or the same as the parent cell undergoing division?

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4)Describe the DNA found in homologous chromosomes.

5)What occurs during the following stages of the cell cycle?

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b.S Phase

c.G2 Phase

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4)How do bacterial cells reproduce?

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6)How do cyclin and cdk act to control the G2 checkpoint?

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8)Cancerous cells form when the cell cycle checkpoints do not function correctly and continues to divide even though it is damaged in some way. How does the protein p53 function to keep these cells from dividing?

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A. Which molecule is secreted by an E. coli cell and may have useful activity beyond the outer membrane?

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~~~~~~~~ANSWER SHOULD BE IN NUMERICAL FORMAT (e.c. 67)~~~~~

Please Note: I have already pondered the guess of 67 for this answer, but my teacher remains to tell me it's incorrect and to rethink it again**

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{}Embden-Mayerhoff Pathway
{}Pentose Phosphate Pathway
{}Tricarboxylic Acid Pathway
{}Fermentation
{}Electron Transport Chain
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