7. High energy electrons are passed through the electron chain and the energy is used to split molecules of water (H2O) into their component hydrogen and oxygen. The oxygen is released as a by-product into the atmosphere. The energy released by breaking the chemical bonds in the water is incorporated, with the hydrogen, into energy carrying molecules called ATP and NADPH2.
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11. plateau At low CO 2 concentration, rate is positively correlated with concentration CO 2 is a substrate in an enyme-catalysed light-dependent reaction.
12. At low light intensity, rate of photosynthesis is proportional to light intensity. plateau
13. Increased temp. gives increased energy and increased rate of photosynthesis Optimum temperature Above the optimum temp., enzymes are denatured and rate drops steeply. Which enzymes are used in respiration?
17. Woody Stem periderm (consists of cork, cork cambium, and secondary cortex) secondary phloem BARK HEARTWOOD SAPWOOD vascular cambium
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Editor's Notes
Photosynthesis title, definition and equation.
Photoactivation of chlorophyll – electrons are excited and return to their original state, releasing oxygen.
Photolysis of water produces high-energy electrons, H+ protons and oxygen.
Light Dependent Reactions title and brief overview.
Light Independent Reactions title – quick overview.
CO2 affects rate of photosynthesis. CO2 is the substrate in carbon fixation (Calvin cycle) – rubisco is the enzyme.
Light intensity affects rate of photosynthesis.
Temperature affects the rate of photosynthesis. Remember enzyme theory. Enzymes used in respiration: rubisco is the main one. ATP synthase can also be denatured.
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