During the fall, what causes the leaves to change colors?
In addition to the chlorophyll pigments, there are other pigments present
During the fall, the green chlorophyll pigments are greatly reduced revealing the other pigments
Carotenoids are pigments that are either red, orange, or yellow
The transfer of one or more electrons from one reactant to another
1. Oxidation is the loss of e-
2. Reduction is the gain of e-
The loss of electrons from a substance or the gain of oxygen.
The gain of electrons to a substance or the loss of oxygen.
Why do cells use for energy?
Sunlight is the ULTIMATE energy for all life on Earth
Plants store energy in the chemical bonds of sugars
Chemical energy is released as ATP during cellular respiration
ATP stands for adenosine triphosphate
It is composed of the nitrogen base ADENINE, the pentose (5C) sugar RIBOSE, and three PHOSPHATE groups
The LAST phosphate group is bonded with a HIGH ENERGY chemical bond
This bond can be BROKEN to release ENERGY for CELLS to use
Removing a Phosphate from ATP
Breaking the LAST PHOSPHATE bond from ATP, will ---
Release ENERGY for cells to use
Produce a FREE PHOSPHATE GROUP
High Energy Phosphate Bond
FREE PHOSPHATE can be re-attached to ADP reforming ATP
Process called Phosphorylation
Parts of Photosynthesis