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| The amount of energy needed to start a chemical reaction |
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| A small organelle, consisting of a single membrane, that is formed from vesicles from the Golgi apparatus |
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| Caused by excess temperature or toxins; permanently alters the shape of an enzyme and renders it inoperable |
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| A substance that takes place in a chemical reaction but does not itself change. Enzymes are organic ____ |
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| An example of a microbody, this organelle produces peroxidases such as catalase |
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| A chemical reaction in which energy must be supplied |
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| A nonprotein molecule that assists enzymes in their actions. Some become intrinsic parts of enzymes, some are recyclable |
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| Multi-step sequences of chemical reactions used in metabolism |
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| Any substance that is acted upon by an enzyme |
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| A small organelle that is responsible for the synthesis of proteins |
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| Represents the mechanism of enzyme action. This model suggests that enzymes are not a fixed shape. |
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| The region of an enzyme where substrate binds. |
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| The variable portion of an amino acid. |
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| An organic molecule consisting of polypeptides or chains of amino acids |
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| Any nonprotein portion of an enzyme |
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| The amount of energy available in a system for doing work |
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| Intermediate complex of an enzyme bound to a substrate |
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| An enzyme, common to all life forms, that breaks down the metabolic waste product hydrogen peroxide |
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| The loss of water from a cell due to osmosis. |
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| A solution possesing a lower concentration of solute molecules than a compared solution |
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| The pressure exerted by the plant cell wall against the water entering the cell by osmosis |
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| A measure of how the relative concentration of solutes in two solutions affect the movement of water |
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| Determines the rate and direction of water flow through a selectively permaeable membrane as affected by osmosis |
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| A difference of concentration in a substance across an area in which it is contained |
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| The net movement of molecules in a liquid or gas, from an area of high concentration to an area of low concentration |
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| A state in which two opposite reactions are occuring simultaneously, so the net result is zero |
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| Selectively Permeable Membrane |
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Definition
| A membrane which allows the passage of some molecules while restricting the movements of others |
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| The measure of how the force of pressure exerted on water affects its movement across a selectively permeable membrane |
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| The bursting of an animal cell due to too much water flowing into the cell from osmosis |
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| A solution possessing an equal concentration of solute molecules as a compared solution |
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| The energy of an object in motion |
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| Diffusion of water across a selectively permeable membrane which blocks the passage of certain dissolved solutes |
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| The orientation of an organism in relation to the presence of light. Movement toward a light source is positive |
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| A group of animals of the same species that live in the same area and breed with one another |
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| Movement of an organism toward or away from a stimulus |
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| Deliberate movement toward or away from a stimulus |
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| A species of the common fruit fly ideal for the study of Mendelian patterns of inheritance due to its chromosomes |
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| The orientation of an organism in relation to the presence of water |
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| Aggresive or submissive response to another organism |
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| All the animals in, and the physical aspects of, a given environment |
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| The orientation of an organism in relation to the presence of a particular chemical |
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| The study of an animal's behavior in its natural habitat |
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| The way an organism reacts to biotic or abiotic factor in its environment |
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| Having to do with all the living things in an ecosystem |
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| Having to do with all the nonliving factors in an ecosystem, such as weather, soil, and terrain |
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| Organisms' movement toward an environment with favorable conditions for themselves and their offspring |
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| Random movement not oriented toward or away from any stimulus |
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| Factor, biotic, or abiotic, that regulates the maximum size of a given population |
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