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| the basic unit of structure and function in living things |
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| an instrument that makes small objects look larger |
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| a widely accepted explanation of the relationship between cells and living things |
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| a tiny cell structure that carries out a specific function within the cell |
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| a rigid layer of nonliving material that surrounds the cells of plants and some other organisms |
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| a cell structure that controls which substances can enter or leave the cell |
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| a cell structure that contains nucleic acids, the chemical instructions that direct all the cell's activities |
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| the region between the cell membrane and the nucleus; in organisms without a nucleus, the region located inside the cell membrane |
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| rod-shaped cell structures that convert energy in food molecules to energy the the cell can use to carry out its functions |
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| a cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another |
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| a small grain-like structure in the cytoplasm of a cell where proteins are made |
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| a structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell |
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| a structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food |
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| a sac inside a cell that acts as a storage area |
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| a small, round cell structure containing chemicals that break down large food particles into smaller ones |
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| any substance that cannot be broken down into simpler substances |
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| two or more elements that are chemically combined |
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| energy-rich organic compound, such as a sugar or a starch, that is made of the elements carbon, hydrogen, and oxygen |
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| large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur |
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| a small molecule that is linked chemically to other amino acids to form proteins |
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| a type of protein that speeds up a chemical reaction in a living thing |
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| energy-rich organic compound, such as fat, oil, or wax, that is made of carbon, hydrogen, and oxygen |
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| very large organic molecule made of carbon, oxygen, hydrogen, nitrogen, and phosphorus, that contains the instructions cells need to carry out all the functions of life |
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| the genetic material that carries information about an organism and is passed from parent to offspring |
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| a nucleic acid that plays an important role in the production of proteins |
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| a property of cell membranes that allows some substances to pass through, while others cannot |
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| the process by which molecules move from an area of higher concentration to an area of lower concentration |
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| the diffusion of water molecules through a selectively permeable membrane |
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| the movement of materials through a cell membrane without using energy |
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| the movement of materials through a cell membrane using cellular energy |
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