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Photosynthesis Overview Photo = light Synthesis = putting together Photosynthesis is the process that plants use to trap the sun’s energy and build carbohydrates (called glucose) that store energy Happens in 2 phases: 1) The Light (light-dependent) reaction creates ATP, releases Oxygen. Powerpoint Presentation: Light Dependant Reaction. Photosynthesis Index. Classifying organisms according to their carbon source and energy supplies Photosynthesis : The Development of Ideas The light dependent reaction : Summary Chlorophyll in the chloroplast Chlorophyll and photosynthesis Carbon fixation : The light independent reaction Although Barnes prefers the former, "photosynthesis" is adopted into common usage. 1905 F. F. Blackman develops the concept of limiting factors, showing that photosynthesis consists of two types of reactions: a rapid light-dependent photochemical process and a slower temperature-dependent biochemical process. Start studying Unit 4: Photosynthesis - Light-Dependent Reactions & Calvin Cycle (Light-Independent Reactions). Learn vocabulary, terms, and more with flashcards, games, and other study tools. What limits the rate of photosynthesis The main variables which affect photosynthesis are light, water, CO 2 concentration and temperature. On a deeper level, other factors like amount of chlorophyll, availability of nutrients (eg Mg is needed for chlorophyll synthesis) will also affect the rate of photosynthesis, though these are rarely covered in discussion of this topic. Magnesium is an essential plant nutrient. It has a wide range of key roles in many plant functions. One of the magnesium’s well-known roles is in the photosynthesis process, as it is a building block of the Chlorophyll, which makes leaves appear green. Magnesium deficiency might be a significant limiting factor in crop production. Photosynthesis is an essential part of the exchange between humans and plants. Amanda Ooten walks us through the process of photosynthesis, also discussing the relationship between photosynthesis and carbohydrates, starch, and fiber -- and how the air we breathe is related to the food we ingest. Title: LIGHT DEPENDENT REACTIONS OF PHOTOSYNTHESIS 1 LIGHT DEPENDENT REACTIONS OF PHOTOSYNTHESIS 2 (1) As light falls upon the pigments of the chloroplast, energy causes the electrons in photosystem II (p680) to leave the chlorophyll a. 3 (2) At the same time, light is absorbed by photosystem I (p700) and electrons are transferred to carrier proteins. Jul 18, 2019 · Light dependent resistors have a low cost and simple structure. These resistors are frequently used as light sensors. These resistors are mainly used when there is a need to sense the absence and presence of the light such as burglar alarm circuits, alarm clock, light intensity meters, etc. LDR resistors mainly involves in various electrical ... 2 Main Reactions: 1) Light Dependent Reaction 2) Light Independent (Dark) Reaction The General Reaction for Photosynthesis: CO2 + H20 C6H12O6 + 02 (can you balance this equation?) C6 H12 O6 CO2 H20 CO2 Temperature and Light Intensity can both affect the rate of photosynthesis, but it will either decrease or level off at some point. The ATP and NADPH produced during the light dependent reactions will be used to power the light dependent reactions of photosynthesis Recommended Light reaction in photosynthesis Samieraa Yusuf. Coral Reefs: Biodiversity and Beauty at Risk Mark McGinley. How Did Scientists discover the properties of electrons ...Chemical energy harvested during the light-dependent reactions drives assembly of sugar molecules from carbon dioxide. Light independent reactions depend on the products of light dependent reactions to function. Harvesting Light. SOURCE: Alberts, et al., Essential Cell Biology, Second Edition. Animation © 2004 Garland Science Publishing and Sumanas, Inc. Essential Cell ... 4.3 Photosynthesis in Detail • Photosystem I captures energy and produces energy-carrying molecules. –chlorophyll absorbs energy from sunlight –energized electrons are used to make NADPH –NADPH is transferred to light-independent reactions Carbon dioxide is present in the air we breathe at very low concentrations. Even though it forms about .04% of the air, it is a needed factor in light-independent photosynthesis. In higher concentrations, more carbon is incorporated into carbohydrates, therefore increasing the rate of photosynthesis in light-independent reactions. This short animation describes the light reactions of photosynthesis. The Light-Dependent Reactions require the presence of light. In green plants, these reactions take place within the chloroplast, and the enzymes that catalyze these reactions are integral parts of the thylakoid membranes, the membranes found within the chloroplast. As a result of the Light-Dependent Reactions, light energy is transduced to the ... 2. The textbook divides the reactions of photosynthesis into 3 stages. List and briefly describe their functions: Light-dependent reactions a. _____ b. _____ Light-independent reactions (Calvin cycle) c. _____ 3. Explain why the light-dependent reactions are called as such: The light-dependent reactions produce oxygen gas and convert ADP and NADP+ into ATP and NADPH. The light-dependent reactions occur in different areas of the thylakoid, called photosystem I and photosystem II. The Calvin cycle uses ATP and NADPH from the light-dependent reactions to produce high-energy sugars. The light-independent reactions can proceed once products (NADPH and ATP) of the light-dependent reactions are present in the chloroplast. The actual fixation of carbon dioxide, which diffuses into the leaf from the atmosphere, occurs by a cyclic series of reactions called the Calvin cycle (named after one of the pioneer researchers in this area) A summary of the Calvin cycle is illustrated in ...