What chemical reaction converts light energy into stored

Questions 1. In order for cells to preform work, such as building molecules, active

� Metabolism = the sum of all of the chemical reactions that occur in

Chemical reactions �reactants(s) products(s) �Some chemical reactions store energy in the bonds of the

Photosynthesis �A process that transfers energy from the sun to producers and transforms it

Glucose is built from CO 2 and H 20 molecules in photosynthesis

Cellular respiration �A process that breaks the bonds of glucose to release the stored

ATP �Adenosine Triphosphate - (ATP) is the main energy molecule for the cell �A

What molecule is built in photosynthesis and broken down in cellular respiration? A. ATP

Plants perform photosynthesis and not cellular respiration. Animals perform cellular respiration and not photosynthesis.

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What chemical reaction converts light energy into stored chemical energy? A. photosynthesis B. hydrolysis C. Cellular respiration D. Dehydration synthesis

Questions 1. In order for cells to preform work, such as building molecules, active transport, gene expression, cell division, and maintaining homeostasis, cells need ______. 2. What characteristic of life refers to cells using and transforming energy in chemical reactions? 3. What two chemical reactions do you know of that involve energy transfers? 4. Write the chemical formulas for carbon dioxide, water, glucose, and a molecule of oxygen (2 oxygen atoms bonded together)

� Metabolism = the sum of all of the chemical reactions that occur in cells that are involved in transferring and transforming energy �Cells need to continually take in and use Energy in order to function �Because energy is continually used in cells, it continually needs to be taken in.

Chemical reactions �reactants(s) products(s) �Some chemical reactions store energy in the bonds of the molecules �Other chemical reactions release the stored energy in the bonds of the reactants �Released energy is used to perform cellular work

Breaking bonds releases energy

Building molecules requires energy

Photosynthesis �A process that transfers energy from the sun to producers and transforms it from light energy to stored, food energy (chemical) �Uses light energy to form glucose from carbon dioxide and water molecules. (an anabolic reaction that requires an input of energy) �Occurs in the chloroplasts of plant cells �Occurs in the cytoplasm of photosynthesizing bacteria

Glucose is built from CO 2 and H 20 molecules in photosynthesis

Cellular respiration �A process that breaks the bonds of glucose to release the stored energy �The released energy is used to build ATP molecules, which can then be quickly used to power cellular work �Glucose is broken down into carbon dioxide and water �When oxygen is used in the reaction, 32 ATP molecules are produced �Occurs in the mitochondria of eukaryotic cells and the cytoplasm of prokaryotic cells

mitochondria

ATP �Adenosine Triphosphate - (ATP) is the main energy molecule for the cell �A lot of energy is stored in the bonds between the three phosphates �When ATP needed, the molecule breaks a bond which releases energy