Chapter 10 – Photosynthesis – Homework
Chapter 10 – Photosynthesis – Homework
1. Write the basic equation for Photosynthesis (Ps) and identify which reactants/products are
correspondingly linked to the light reaction and the dark reaction.
2. Some students define Photosynthesis as the process by which plants use light energy as food. Discuss if this statement would likely be accepted by an AP Biology Exam Reader and justify your response.
3. Contrast and compare a Photosynthesis absorption spectra versus a Photosynthesis action spectra.
4. Discuss why is the narrow area of electromagnetic radiation between 380-750 nm is the
optimal choice to power photosynthesis.
5. Contrast and compare the function of the chlorophyll pigments versus the function of the
accessory pigments in Photosynthesis.
6. Discuss the adaptive value for trees up north to have their leaves change color in the fall.
7. Contrast and compare the location, function, requirements and products of the Light
Reaction and Dark Reaction.
8. During the light reaction the proton gradient created by chemiosmosis can be as great
as 2-3 pH units. Explain on which side of the membrane (stroma or lumen of the grana) the
pH would be the lowest after the light reaction has run for several hours.
9. A scientist requests a research grant to develop a plant that does not undergo
photorespiration. He claims that such a plant would help reduce world hunger. Discuss if
this might be a project worth funding with a research grant and justify your answer.
10. Describe what environmental conditions make C4 Photosynthesis and CAM Photosynthesis good adaptations.
11. In science fiction stories, plants that live on planets far from the sun are often described as
having black foliage, while those that live on planets close to the sun are described as having
shiny reflective foliage. If the plants on these planets do photosynthesis similar to terrestrial
plants, discuss why these colors would be good adaptive features.
12. Dr. Smith grows his African violets under artificial lights. Discuss what aspects of light
quality and light quantity must he consider in order to get optimum growth.
Homework resources:
Mader Chapter 7 - Photosynthesis
Campbell Chapter 10
OpenStax Biology – Chapter 8
Videos:
Bozeman Biology Photosynthesis
Crash Course – Photosynthesis
Action and Absorption Spectrum – Mr I
Why leaves change color?
Chemiosmosis in photosynthesis
C3, C4 and CAM
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