Understanding Plant Physiology (KEY TERMS (Glucose, ATP: Compound,…
Understanding Plant Physiology
Definition: the study of the functions of plants.
Green plants and bacteria create their food.
ATP: Compound, Adenosine triphosphate
Chlorophyll: the primary pigment involved in the maufacture of food, uses the light energy to make the high-energy compounds ATP and NADPH.
Chloroplast: a specialized organelle within an individual plant cell.
Definition: the process by which a plant turns light energy from the sun into chemical energy in the form of sugar.
Complex series of chemical reactions that happens within the plant cells.
Two Stages: light reaction & carbon dioxide fixation
CARBON DIOXIDE FIX
Energy in the form of ATP and NADPH is used to form sugars.
Carbon dioxide enters through the stomata and is available to the chlorophyll in the cells.
The CO2 combines with hydrogen from the water molecule.
Light energy is trapped and used to fuel the photosynthesis process.
The harnessing of light energy is made possible by pigments found in chloroplasts.
Chlorophyll uses the energy to split water molecules during the first stage of the photosynthesis reaction.
Oxygen atoms from water molecules bond to form O2.
The O2 escapes through the stomata into the atmosphere.
Hydrogen atoms from the water molecule are incorparated into sugar molecules as the process continues in CO2 fixation.
Chloroplasts, carotene, and xanthophyll absorb the energy as light enters chloroplasts.
Compounds power reactions in the cells.
THE IMPORTANCE OF PHOTOSYNTHESIS AND CELLULAR RESPIRATION
CHECKING YOUR KNOWLEDGE