8.4 The Two Parts of Photosynthesis: The Calvin Cycle | …
NOVA - Official Website | Illuminating Photosynthesis
Plants have two ways of moving water from outside the root toward the inside of the root to the xylem and phloem tissue. Water can flow between the cell walls of adjacent cells. Think of this area as a hallway. Or water can flow between cells through tubes connecting the cytoplasm of each cell, much like people can walk through doors of adjoining rooms.
Photosynthesis is the process plants use ..
Phloem tissue contains cells called , which connect in columns called . Each sieve-tube element has a pore on the end of it, through which the cytoplasm from one sieve-tube element can “touch” the cytoplasm of the next sieve-tube element. This structure allows the fuel that the plant makes in the leaves to pass through and nourish the rest of the plant. This process is called .
Overview of Photosynthesis | Biology I
Most of the energyreleased both by the burning of fossil fuels and by the metabolism ofliving cells is given off as heat and must be replaced by thecontinued input of radiant energy from the Sun.The principal organic products of plant photosynthesis arecarbohydrates.
All living organisms on earth consist of one or more cells
Photophosphorylation is the production of ATP using the energy of sunlight. Photophosphorylation is made possible as a result of chemiosmosis. Chemiosmosis is the movement of ions across a selectively permeable membrane, down their concentration gradient. During photosynthesis, light is absorbed by chlorophyll molecules. Electrons within these molecules are then raised to a higher energy state. These electrons then travel through Photosystem II, a chain of electron carriers and Photosystem I. As the electrons travel through the chain of electron carriers, they release energy. This energy is used to pump hydrogen ions across the thylakoid membrane and into the space within the thylakoid. A concentration gradient of hydrogen ions forms within this space. These then move back across the thylakoid membrane, down their concentration gradient through ATP synthase. ATP synthase uses the energy released from the movement of hydrogen ions down their concentration gradient to synthesise ATP from ADP and inorganic phosphate.