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Biology Chapter 5
Chapter 5 vocabulary 1
Term | Definition |
---|---|
Energy | The capacity to do work. |
Potential energy | Stored energy |
Kinetic energy | Energy in motion |
Calorie | The amount of heat required to raise the temp of 1 gram of water by 1 degree C. |
Kilocalories | 1,000 calories (C) |
1st law of thermodynamics | Conservation of energy or energy cannot be created or destroyed but it can be changed from one form to another form. |
2nd law of thermodynamics | Energy cannot be changed from one form to another form without a loss of usable energy. |
3rd law of thermodynamics | Entropy-disorganized. All lost heat/energy goes up. |
Heat | Diffuse energy and lease usable form |
ATP | Energy currency of cells. Contains sugar ribose, nitrogen-containing base adenine, and 3 phosphate groups that are negatively charged. |
ATP cycle | The continual breakdown and regeneration of ATP. |
ADP | ATP + P |
AMP | ADP + P |
Coupled reaction | They allow the energy releasing reaction to provide the energy needed to start the energy-requiring reaction. |
Photosynthesis | Process occurring usually when chloroplasts, where by chlorophyll-containing organelles trap solar energy to reduce carbon dioxide to carbohydrates. |
Chloroplast | Membrane-bound organelle in algae and plants with chlorophyll-containing membranous thylakoids; where photosynthesis takes place. |
Chlorophyll | Green pigment that absorbs solar energy and is important in algal and plant photosynthesis. |
Thylakoid | Flattened sac within a granum whose membrane contains chlorophyll and where the light reactions of photosynthesis occur. |
Cellular respiration | Metabolic reaction that uses the energy from the breakdown of carbohydrates (primarily glucose), fatty acids, or amino acids to produce ATP molecules. Consist of a series of reactions that produce the end products of energy. |
Metabolic pathway | The chemical reaction in a cell are linked to occur in a particular order. In the pathway, one reaction leads to the next reaction, which leads to the next reaction, and so forth, in an organized, highly structured manner. |