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Photosynthesis Hack

In: Other Topics

Submitted By redmambasu
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Biology 121 Spring 2015 Homework #3 Name:

If this assignment is turned in Friday 3/20, you may make corrections. You can still turn it in on Monday 3/23, but then you will not be able to make corrections (and that is your next exam). Corrections can only be made on questions you have attempted to answer.

This assignment is to be done ON YOUR OWN. It will count as 0.5% of your course grade.

Read the article at the following link:

http://www.nature.com/news/hacked-photosynthesis-could-boost-crop-yields-1.15949

Note: Nature is the one of two or three premier journals in science (only the most important work gets published in it), but their news section is highly readable.

1. What is the title of the news article?

2. Why is boosting crop yields necessary?

3. What enzyme did the researchers target and what does the enzyme do?

4. Why do plants have so much of this enzyme?

5. The Cornell researchers took this enzyme from another source to put into what crop plant?

What source did they take the enzyme from?

6. In what way is the substitute enzyme more wasteful than the original enzyme?

7. What is it called when Rubisco uses O2 instead of CO2, and why is this a problem? (The answer to this second question is not in the article, you should know this from the snow day class.)

8. How do the bacteria that normally use this enzyme compensate for its wastefulness?

9. Would you eat a (let’s say tomato) that contained this alternative enzyme? Explain why or why not.

10. Would you eat a tomato that has been treated with 1-MCP (the competitive inhibitor to the natural ripening agent which we discussed in class) to delay ripening or prevent over-ripening? Explain why or why not.

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