All You Need to Know About Photosynthesis and Cellular Respiration
Photosynthesis is the process by which plant cells convert light energy from the sun into chemical energy, so as to create energy-rich carbohydrate molecules like glucose. Cellular respiration is the process of breaking down food molecules to obtain energy and store it in the form of adenosine triphosphate (ATP) molecules.
Plant cells, after creating sugar molecules through photosynthesis, undergo cellular respiration to create ATP molecules. Animals obtain food molecules from plants and other organisms, and then undergo cellular respiration to obtain ATP molecules. All living organisms utilize these stored ATP molecules to carry out their metabolic processes.
- Photosynthesis takes place in two stages of the light reactions and the dark reactions. Cellular respiration involves aerobic (glycolysis) and anaerobic respiration.
- Photosynthesis takes place only when there is sunlight. Cellular respiration occurs at all times.
- Photosynthesis takes place in plant leaves containing the chlorophyll pigment. Cellular respiration takes place in the cytoplasm and mitochondria of the cell.
- Photosynthesis utilizes sunlight to produce food molecules. Cellular respiration utilizes glucose molecules to obtain energy-storing ATP molecules.
- Photosynthesis uses water, sunlight, and carbon dioxide from the atmosphere to create glucose molecules, and releases oxygen as a by-product. Cellular respiration uses glucose molecules and oxygen to produce ATP molecules and carbon dioxide as the by-product.
- Photosynthesis involves conversion of one type of energy into another: light energy into chemical energy. Cellular respiration involves using that chemical energy and breaking it down to release energy.
- Photosynthesis occurs only in plants and some bacteria. Cellular respiration takes place in all types of living organisms.
...constant * 2nd Law of Thermodynamics- energy transfer results in increase entropy (less organization!!) * Adenosine is bonded to 3 phosphates 2. When cell needs energy… it splits off that 3rd P 3. Energy is released, ADP + P is formed, cell uses that energy for whatever it needs 4. Destination of the broken Phosphate??- Used as part of an endergonic reaction in another cell? * Exergonic- catabolism 1. CellularRespiration, Digestion * Endergonic- anabolism 2. Protein Synthesis (Polymerization), making cell parts CellularRespiration * Aerobic Respiration 1. Glycolysis 2. Formation of acetyl CoA 3. Krebs Cycle 4. Oxidative Phosphorylation Glycolysis * Glucose goes into the cycle… * 6 Carbon to 2, 3 Carbon molecules, called Pyruvic acid * Occurs in cytoplasm (cytosol) * Net ATP of 2 (because you used 2 in the beginning), 2 pyruvic acids, 2 NADH * GLYCOLYSIS CAN BE DONE WITH OR WITHOUT OXYGEN * At this point, the cell can either continue anaerobically or switch to TRUE aerobic respiration Formation of Acetyl CoA * When oxygen is present, pyruvic acid enters the mitochondrion 1. Each pyruvic acid (2) converted to Acetyl CoA (2) 2. Co2 (2) is released 3. 2 NADH made (still in cytoplasm) Krebs Cycle * aka CITRIC ACID CYCLE, takes place in Mitochondrial Matrix * Acetyl CoA enters the...