Photosynthesis

process by which plants manufacture their own food

they contain a pigment called chlorophyll, it is found in the chloroplasts of the plant cells

process by which bacteria make their own food , the obtain the energy required through certain chemical reactions

an organism that manufacture its own food and it does not have to produce its food through the process photosynthesis

CO2 + H2O +sunlight—————>O2 +C6H12O6

1) The double membrane allows CO2 and water to enter the chloroplast 2) the starch granules store starch 3) the ribosomes are a site of protein synthesis this is where enzymes are manufactured and these enzymes are used in the dark phase 4) the thylakoids contain chlorophyll and chlorophyll traps sunlight 5) the stroma increases the surface area to trap sunlight

a phase in photosynthesis that is dependent on light, that occurs in the grana because the grana contains chlorophyll and the chlorophyll absorbs radiant energy from the sun

• used to form AT[P - used to split the water molecules into hydrogen and oxygen atoms

the hydrogen atoms are high in energy ,they combine with co-enzymes that carry them to the dark phase. The O2 is released into the atmosphere as a by-product ,the O2 then leaves the leaves through the stomata

• independent of light, occurs in the stroma • the CO2 provides the carbon & oxygen • the carbon and oxygen combine with the high energy hydrogen atoms of the light phase to form the high energy carbohydrates such as glucose . • this reaction requires a lot of energy , this energy comes from the high energy atoms and ATP molecules

light phase - Oxygen dark phase -glucose [C6H12O6]

• provides a primary source of food for all organisms • provides oxygen ,which is needed for respiration for most living organisms • fossils fuels such as coals and oils are derived from plants,( the energy stored in these fossils fuels were originally trapped from the sun during photosynthesis

provides energy for cells it is an energy carrier used by living cells

an increase in temperature can speed up the process of photosynthesis but when the temperature reaches an optimum(30 degrees C) the rate of photosynthesis slows downs because the enzymes controlling photosynthesis have become denatured and can no longer function. Temperature is a limiting factor