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21 Cards in this Set
- Front
- Back
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What is a virus?
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a microscopic particle made of either a DNA or an RNA core and covered with a protein coat; it infects host cells in order to reproduce
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What is a host cell?
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a living cell in which a virus reproduces.
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What is a vaccine?
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a solution made from damaged virus or bacteria particles or from killed or weakened viruses or bacteria; can prevent but not cure many viral and bacterial diseases.
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What is AIDS?
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acquired immune deficiency syndrome. A fatal communicable disease caused by HIVS.
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What is a compound light microscope?
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an instrument that uses light and convex lenses to magnify objects.
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What is an electron microscope?
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an instrument that bends beams of electrons in a magnetic field.
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What is cell theory?
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a major theory of life science. The cell is a basic unit of life.
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What is a cell membrane?
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the selectively permable outer boundry of a cell that allows food and oxygen to move into the cell and waits to leave it.
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What is a nucleus?
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The structure inside a cell that directs the cell's activities.
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What is a chromatin?
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hereditary material in a cell's nucleus.
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What is a cytoplasm?
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the gel like substance inside the cell membrane that contains structures that carry out life processes.
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What is an orgenelle?
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in eukaryotic cells, the structures within the cytoplasm that breaks down food.
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What is endoplasmic reticulum?
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a cell organelle consisting of folded membranes that move materials around the cells.
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What is ribosome?
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a cell organelle on which protein is made.
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What is a golgi body?
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cell organelles consisting of stacks or membrane-covered sacks that package and move proteins to the outside of the shell.
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What is mitochondria?
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cell organelles that break down food molecules and release energy.
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What is lysome?
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a cytoplasmic organelle that contains chemicals and digests wastes and worn out cell parts.
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What is cholorplast?
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plant cell organelles in which light energy is changed into chemical energy in the form of sugar during photosnythesis.
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What is a cell wall?
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in plants, the ridgid structure made of cellulose.
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What is tissue?
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group of similar cells that do the same sort of work.
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What is an organ?
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a structure made up of different types of tissues that work together.
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