photosynthesis equation
What is an autotroph?
Autotrophs are "self-feeders".
How does Ps relate to fall leaf colors?
Plants change their leaves color in the fall. Most leaves include the chlorophyll (green), xathophyll (yellow) and carotene (orange) pigments, but chlorophyll is much than the others. It covers other two. During fall, the strength of light is weaker and the temperature drops, too. Plants/leaves adopt to it by breaking down chlorophyll. N and Mg (building chlorophyll) are salvaged and moved into the stem for next year. Now other, accessory pigments are reflected the most and give leaves diverse “fall” colors.
Facts:
- Photosynthesis converts light energy to chemical energy of food!
- The light reactions convert solar energyto the chemical energy of ATP and NADPH.
- The Calvin Cycle uses ATP and NADPH to convert carbon dioxide to sugar.
- Alternative mechanisms of carbon fixation have evolved in hot, arid climates.
- All green parts of plants have chloroplasts.
Key terms:
Autotrophs – self feeders
Heterotrophs – obtain their organic material by the second major mode of nutrition, unable to make their own food
Chlorophyll – the green pigment within chloroplasts
Mesophyll – the tissue in the interior of the leaf
Stroma – the dense fluid within the chloroplasts
Thylakoids – interconnected membranous sacs
Grana – thylakoid coumn
Photophosphorylation – adition of a phosphate group to ADP
Carbon fixation – initial incorporation of carbon into organic compounds
Wavelength – the distance between the crest of electromagnetic waves
Summary:
Photosynthesis is a process in which light energy is converted to chemical energy and used to produce organic compounds. In plants, photosynthesis occurs within the chloroplasts. Photosynthesis consists of2 stages, the light and the dark reactions. The light reactions convert light into energy (ATP, NADPH) and the dark reactions use energy and carbon dioxide to produce sugar.
Extra: light dependant reaction of photosynthesis video!
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