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42 Cards in this Set
- Front
- Back
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Define Photosynthesis?
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The process by which green plants produce organic compounds in the presence of sunlight using carbon dioixde, water and minerals from the soild.
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Where are chlorophyll seen?
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In Chloroplasts
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What are the three different pigments in Chloroplasts?
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1. Chlorophyll A
2. Chlorophyll B 3. Carotenoids |
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What does Chlorophyll A do and what color is it?
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Absorbs light energy (green)
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What does Chlorophyll B do and what color is it?
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Absorbs light energy and delivers to chlorophyll A (yellow)
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What does Carotenoids do and what color is it?
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Absorbs light energy and deliver to chlorophyll a and disperse excessive light that would damage the pigment (orange)
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What is the function of chloroplasts?
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To convert solar energy to chemical energy
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What are stomata?
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Openings on leaves through which water is lost
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What is loss of water in plants called?
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Transpiration
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Why are Light Reactions called that way and where do they occur in?
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The only happen in the presence of light and occur in the Thylakoids
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Why are Dark Reactions called that way and where do they occur in?
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Occur in the absence of light and occur in the Stroma
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What is the process of Light Reactions?
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1. H2O split by the light
2. NADP+ reduced to NADPH 3. ATP Produced |
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What is the process of Dark Reactions?
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1. ATP gives energy for sugar synthesis
2. Formed from Carbon and Oxygen and from Hydrogen and Electrons |
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What is Electromagnetic spectrum?
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The full range of radiation from the very short wavelengths to the very long wavelengths
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List the Electromagnet Spectrum from Small to Large
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Gamma Rays - Xrays - UV - Infrared - Microwaves - Radiowaves
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What is the relationship between energy and wavelength
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Inversely proportioned
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What are the 7 colors of visible light?
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VIBGYOR
Violet Indigo Blue Green Yellow Orange Red |
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How do we see color?
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The wavelength is reflected back to us
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Why do leaves appear green?
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It absorbs all other colors except green
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What happens when pigments absorb light energy?
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They produce the other colors
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What is a photosystem?
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An electron in the chlorophyll gets excited and jumps up one energy level when light is present and then falls back down to the ground state when it loses the heat and light
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What is the structure of a photosystem?
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Several Pigment molecules a big Chlorophyll A and Primary Electron Acceptor
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What happens to Excited Electrons after the photosystem?
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Absorbed light energy jumps from pigment molecule and finally reaches Chlorophyll A and they get captured by the Primary Electron Acceptor
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Describe Photosystem 1
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A cluster of accessory pigment molecules and big reaction center and primary electron acceptor on the thylakoid membranes
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Describe the Electron Transport Chain
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A series of protein molecules on the thylakoid membranes
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Describe Photosystem 2
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Same as Photosystem 2 that takes splitting of water
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Describe what happens in PS2
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Light energy hits water and water gets split into hydrogen ions and oxygen which is released. Light hits the 2nd photosystem accessory pigment molecule to reaction center and loses electron to primary electron acceptor then delivers to PS 1
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When the Splitting of H2O happens where does the water go?
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It gets spit out through ATP synthases
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Where do dark reactions take place?
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In the Thylakoid Sacs in Stroma
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Do Dark Reactions Need Light?
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No
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What do Dark Reactions do?
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Synthesize organic compounds
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What does ATP do for dark Reactions?
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Provide energy
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What does PGA stand for?
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phosphoglyceric acid
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What
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Nicotinamide adenine dinucleotide phosphate
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What does NADPH stand for?
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reduced nicotinamide adenine dinucleotide phosphate (PH I)
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What does G3P stand for?
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glyceraldehyde 3 phosphate
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What does RuBP stand for?
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Ribulose biphosphate
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What types of plants dont die during drought and why?
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C4 and CAM plants because they store carbon dioxide in excess
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What are the two types of Reactions and what is produced?
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Spatial Segregation : Storing of CO2 and run calvins cycle
Temporally Segregated: Respect to time |
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What is the Greenhouse Effect?
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The warming of earths atmosphere caused by the trapping of heat by carbon dioxide, methane and other gases.
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What is Global Warming?
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An increase in average temperature of earth's atmosphere that causes climatic changes.
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How does one counteract global warming?
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Carpooling and planting trees
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