Exam_2_Key - Exam 2 - Respiration, Photosynthesis &...

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Exam 2 — Respiration, Photosynthesis & Cell Cycle Name ______KEY____________ 19 October 2007 45 pts 1. Corals are animals that contain a symbiotic alga that performs photosynthesis, producing a food source for the coral. Fill in the blanks . (17 pts, 1 pt each) 2. (2 pts) Photosynthetic corraline algae are a part of tropical reef systems. These are often red algae (Rhodophyta) that, because of the abundance of the accessory pigment phycobilin, appear red. Draw an absorbance spectrum that could come from a red alga. Absorbance Violets Blues Greens Yellows Oranges Reds Wavelength of Light Energy, in the form of __photons (light)_____ strikes molecules of __chlorphyll______ embedded in the thylakoid membranes of the _chloroplasts__. This excites electrons, who pass on this elevated energy level to neighboring electrons, eventually pushing an electron out of the reaction center. This electron originally came from splitting ___water_____ into __H+ ions____, __oxygen____, and electrons. This electron (and others) are passed to an electron transport chain, which pumps __hydrogen ions_______ into the interior of the thylakoid lumen. These exit the lumen through an enzyme, _ATP_synthase___ which results in the phosphorylation of __ADP to ATP___. The main function of Photosystem II is to… ___generate ATP____________________ The electrons are carried to Photosystem I , where they are re-energized. These energetic electrons are captured as chemical energy by the molecule _NADP+ (or Ferrodoxin or NADPH_. The chemical energy from Photosystems I&II are used in the ___Calvin Cycle_________ to combine ___CO 2 ________ with RuBP. This is catalyzed by the enzyme _rubisco_____. Enzymes and chemical energy convert the resultant molecule into G3P, which is synthesized into ___glucose____________. This product can be used as a source of energy in (and the starting point for) aerobic respiration. Respiration can be divided into three main parts:
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This note was uploaded on 04/29/2008 for the course BIO 101 taught by Professor Grinnell during the Fall '07 term at Gustavus.

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Exam_2_Key - Exam 2 - Respiration, Photosynthesis &...

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