Ch.10 - PhotosynthesisSee all chapters
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Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology

Light Reactions

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Sections
Photosynthesis
Light Reactions
Calvin Cycle
The Need for CO2
Additional Practice
Photosynthesis Review
Additional Problems
What is a product of photosystem II? a. NADPHb. Waterc. Oxygend. ADPe. Glucose
The light reactions use sunlight as their energy source. a. Trueb. False
When chlorophyll a absorbs light, electrons are "excited" and ejected from the chlorophyll a molecule.a. Trueb. False
In mechanism, photophosphorylation is most similar to what process in cellular respiration?
The light reactions require the cooperation of two photosystems to power linear electron flow from water to NADP+. Determine whether each process is associated with Photosystem II (PS II) only, Photosystem I (PS I) only, or PS II and PS I. Note that electron transport chain here refers to the electron transport chain between the two photosystems, not the one that functions after PS I.
Which of the following events in the light-dependent reaction of non-cyclic photophosphorylation would be the last to occur?a. Excitation of an electron in the reaction center of photosystem IIb. Splitting of waterc. Excitation of an electron in the reaction center of photosystem Id. Pumping of protons across the thylakoid membranee. Passing of an electron to photosystem II 
In a lab experiment certain plants are creating very little of both ATP and NADPH. Which of the following provides a good explanation for this occurrence? a. These plants are being exposed to light of only blue and red wavelengths. b. These plants are being exposed to light of only green wavelengths. c. These plants are not being exposed to adequate visible light. d. a) and c) e. b) and c)
The _______ membrane of the chloroplast is similar to the ______ membrane of the mitochondria. Fill in the blanks with the word pair that correctly completes the sentence. a. thylakoid; outer b. inner; inner convoluted c. stromal; double d. thylakoid; inner  
When donating its activated electron, the chlorophyll in photosystem II (P680) is said to be a very powerful oxidizing agent. This is best shown by its ability to… a. make use of a proton electrochemical gradient to drive the formation of ATP. b. force the oxidation of oxygen in water to oxygen gas. c. donate an electron to plastoquinone (Pq). d. absorb light energy to power redox reactions. e. force the reduction of NADP+ to NADPH.
Photosystem I produces: a. NADPH.b. ATP.c. glucose.d. water.e. NADH.
In photosynthesis, the oxygen atoms in H 2O are: a. energized.b. reduced.c. respired.d. oxidized.e. broken down.
The rate of photosynthesis is especially high when chloroplasts are exposed to two wavelengths of light, 680 nm and 700 nm. This is because these are the wavelengths of lighta. picked up by the two accessory pigments.b. that excite the special chlorophyll in the two separate photosystems.c. that represent the two peaks of excitation (blue and red) of chlorophylld. that excite chlorophyll a and chlorophyll b, respectively
The process that forms the electrochemical gradient during photosynthesis is the :A. movement of water by osmosis.B. hydrolysis of ATPC. pumping of H+ into the thylakoid lumen.D. production of H+ in the stroma during NADPH production.E. production of water from oxygen in the thylakoid lumen.
Explain what is meant by chemiosmosis and relate this to the electron transport chain present in the thylakoid membrane.
Even though plants carry on photosynthesis, plant cells still use their mitochondria for oxidation of pyruvate. When and where will this occur?A. in photosynthetic cells in the light, while photosynthesis occurs concurrentlyB. in nonphotosynthesizing cells onlyC. in cells that are storing glucose onlyD. in all cells all the timeE. in photosynthesizing cells in the light and in other tissues in the dark