Science chapter 2 vocab
Terms in this set (24)
the theory that states that all living things are made of one or more cells, the cell is the smallest unit of life, and new cells come from preexisting cells.
this substance formed by joining many small molecules together.
they are that form when long chains of molecules called nucleotides join together.
they are a long chains of amino acid molecules.
it is a large macromolecule that does not dissolve in water.
one sugar molecule, two sugar molecules, or a long chain of sugar molecules make up this.
this is a flexible covering that protects the inside of a cell from the environment out side the cell.
it is a stiff structure outside the cell membrane.
it is a fluid inside a cell that contains salts and other molecules.
this is a network of threadlike proteins that are joined together.
this is another structures which have specialized functions.
this is the part of a eukaryotic cell that directs cell activities and contains genetic information stored in DNA.
they are membrane-bound organelles that use light energy and make food-a sugar called glucose-from water and carbon dioxide in a process known as photosynthesis.
it is the movement of substances through a cell membrane without using the cell's energy.
Movement of molecules from an area of higher concentration to an area of lower concentration.
Diffusion of water through a selectively permeable membrane.
Movement of specific molecules across cell membranes through protein channels.
it is the movement of substances through a cell membrane only by using the cell's energy.
it is the process during which a cell takes in a substance by surrounding it with the cell takes cells membrane.
Process by which a cell releases large amounts of material.
the process by which cells use oxygen to produce energy from food.
the breakdown of glucose by enzymes, releasing energy and pyruvic acid.
process by which cells release energy in the absence of oxygen.
it is a series of chemical reactions that convert light energy, water, and CO2 into the food-energy molecule glucose and give off oxygen.
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