Chapter 6: Energy for Life Flashcards
Photosynthesis
Transforms solar energy into chemical energy for carbohydrates. requires sunlight, CO2, water
Reaction formula for photosynthesis
CO2 and H2O diffuse into mesophyll cells and then into chloroplasts. carbon dioxide is reduced (gains electrons) and water is oxidized (loses electrons)
Producers and examples
Feed themselves and all of the consumers. Produce energy (sugar) Ex: plants, algae and cyanobacteria
Chloroplast
Membrane-bound organelle in algae and plants with chlorophyll-containing membranous thylakoids; where photosynthesis takes place
Stroma
In chloroplast, a double membrane surrounds a fluid-filled area
Mesophyll cells
reactions of photosynthesis occur in __________ which are found in the leaves and other green tissues of a plant.
Thylakoids
a separate membrane system within the stroma forms flattened sacs, some places are staked to form grana
Chlorophyll
green pigment that absorbs solar energy and is important in algal and plant photosynthesis
Photosynthetic Process
Begins with the end products of cellular respiration, CO2, and H2O - hydrogen atoms removed from water are added to carbon dioxide - oxygen is a byproduct of oxidation of water - End product is CH2O or glucose C6H12O6
Reduction
a molecule gains electrons (e-) and hydrogen ions (H+) and the molecules
Oxidation
a molecule gives up (e-) and hydrogen ions, and the molecule is said to be oxidized
Redox reactions
in the cell reduction reactions are often coupled with oxidation reactions, these couple reactions are commonly called _______
Calvin cycle
Light reactions
portion of photosynthesis that captures solar energy and takes place in thylakoid membranes of chloroplast; produces ATP and NADPH
