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SI session Nov. 1 Ch. 11 answers

SI session Nov. 1 Ch. 11 answers - Kaiser Imam November 1...

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Kaiser Imam November 1, 2007 BIOL 215 SI Session Chapter 11 Chapter 11: Photosynthesis 1. Fill in the following diagram of a chloroplast. 2. Write a general chemical equation for the final products of oxygenic photosynthesis. 6 CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2 3. Write a general expression for the direct products of photosynthesis by oxygenic phototrophs. light + 3 CO 2 + 6 H 2 O → C 3 H 6 O 3 + 3 O 2 + 3 H 2 O 4. Name where each of the following is located in the plant cell: a) Energy transduction complexes: thylakoid membrane b) H + ions are pumped into the… thylakoid lumen c) Site of oxygen production: thylakoid lumen d) H + flow through the ATPase into the… chloroplast stroma e) Site of ATP production by the chloroplast ATP synthase: chloroplast stroma f) Calvin Cycle: chloroplast stroma 1
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5. Describe photosynthesis in prokaryotes. How does this relate to the endosymbiont theory? Prokaryotes conduct the energy transduction reactions of photosynthesis in their plasma membranes. In some species, such as cyanobacteria, the plasma membrane is folded inward to form photosynthetic membranes analogous to thylakoids. The carbon assimilation reactions would be performed in the cytoplasm in these organisms. Similarities between bacteria, chloroplasts, and mitochondria have led biologists to form the endosymbiont theory, which suggests that chloroplasts evolved from bacteria that were engulfed by primitive cells 1 to 2 billion years ago. 6. Take a look at Figure 11-5 in your book. What colors in the visible spectrum do both forms of chloroform absorb? What colors do they reflect? Chlorophyll is best at absorbing wavelengths of light at the red and blue ends of the visible spectrum. It does not absorb the green wavelengths at the center but rather reflects those photons. That’s why most plants appear green. 7. What is the purpose of the other pigments shown in Figure 11-5? The other pigments shown are known as accessory pigments and they absorb photons that cannot be captured by chlorophyll. This enables the plant to collect photons from a much larger part of the visible spectrum than would be absorbed by chlorophyll alone. Accessory pigments are found in some leaves in plants but in much lower concentration than chlorophyll. Fill in the blanks: 8. During the __ energy transduction __ reactions of photosynthesis light energy is captured by molecules of the pigment __ chlorophyll __ and converted to chemical energy in the form of __ ATP __ and the reduced coenzyme __ NADPH __. 9. During the carbon assimilation reactions, commonly known as the __ Calvin Cycle __, fully oxidized carbon atoms from __ carbon dioxide __ are __ reduced __ and __ covalently attached __ to organic acceptor molecules to form __ carbohydrates __. 10. The carbohydrates directly produced in photosynthesis are not six-carbon sugars but rather __ triose phosphates __ that contain __ 3 __ carbon molecules.
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SI session Nov. 1 Ch. 11 answers - Kaiser Imam November 1...

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