Name: ______
Chapter 10: Photosynthesis Part A
Let’s get some terms down:
Photosynthesis:
Autotrophs:
Heterotrophs:
10.1: Conversion of light
Sketch a typical (or atypical, judging by some of your drawing talents) chloroplast, labeling the major parts: (be sure to discuss the function of each of these)
Write out the chemical equation for photosynthesis below:
Compare this to the general equation for respiration below:
Water Shplitting! Just read over this section.
Photosynthesis can be split into 2 major reactions. Name them, and briefly summarize what happens during each:
(A)
(B)
10.2: Light Reactions
Explain that whole wavelength/visible light thing to me:
What are photons?
What is a spectrophotometer?
Explain how one would work (see figure 10.8):
Explain what an absorption spectrum is, then sketch and explain the absorption spectrum for chlorophyll b:
What’s an action spectrum?
What are:
Chlorophyll a
Chlorophyll b
Carotenoids
Xanthophylls
Explain how pigments get “excited” by light:
Photosystem time! Explain what a photosystem is, and discuss the major components of one:
There are 2 photosystems; PS I and PS II. Why 2? How are they different?
Describe the steps of noncyclic electron flow:
Why is it called “non-cyclic”?
Do an overview of cyclic electron flow:
Please to explain how chemiosmosis works in a chloroplast:
How is it different that it was in the mitochondria?
How is it similar?
If you were on a desert island and could only pick 1 color of light for your plants, which would be your LEAST attractive choice? Why?
In the light reactions, what is the electron donor? Where do the electrons end up?
Chapter 10: Photosynthesis Part B
10.3 Calvin Cycle
- I was dying to call it the “Calvin & Hobbes Cycle”; if his pet didn’t wash, would it be the “Calvin & Slobs Cycle”? Now you do one:
Why play around? Summarize the Calvin Cycle here:
In general then,
a) what’s the point of the Light reactions?
b) what’s the point of the Calvin Cycle?
While you’re at it, explain photorespiration:
Most of what WE think of as photosynthesis is C3 photosynthesis.
What is C4 photosynthesis?
Why don’t all plants do C4?
Now, joo mus’ esplain CAM photosynthesis:
Try the self quiz on page 199-200; see if it all makes sense.