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Science Chapter 3
Terms in this set (50)
most mature plants cells have one _______. It is a large sac that stores food, water, waste, and other materials within the cytoplasm.
the nucleus is surrounded by a membrane called the _____________. It protects the nucleus and materials pass in and out of the nucleus through pores in this.
receive materials from the ER and send them to other parts of the cell. Release materials outside the cell
small organelles that contain chemicals that break down food particles and worn out cell parts
large organic molecules made of carbon, hydrogen, nitrogen, and in some cases sulfur
a simple organic compound containing both a carboxyl and an amino acid group
a type of protein that speeds up chemical reaction in a living thing
long organic molecules made of carbon, oxygen, hydrogen, nitrogen, and phosophorus
DNA (deoxyribonucleic acid)
genetic material that carries info about an organism is passed down from parent to offspring
small structures inside of a cell that carry out specific functions within a cell
composed of many cells
the basic units of structure and function in living things. form the parts of an organism and carry out all of an organisms processes or functions
RNA (ribonucleic acid)
plays an important role in protein reproduction. can be found in the cytoplasm and nucleus
a spot on the nucleus where ribosomes are made
any substance that can't be broken down to simpler substances
the movement of materials through a cell membrane using cellular energy
the movement of dissolved materials through a cell membrane without using cellular energy
a group of similar cells that work together to perform a specific function
a widely accepted explanation of the relationship between cells and living things
the diffusion of water molecules through a selectively permeable membrane
some substances can pass through the membrane while other can't
the process by which molecules move form an area of higher concentration to lower concentration
most of the cell's energy is produced within rod shaped organelles
energy rich organic compound made of carbon, hydrogen, and oxygen
two or more elements combine chemically
energy rich organic compounds that are made of carbon, hydrogen, and oxygen, but have more energy than carbohydrates
is made up of different tissues that work together
a group of organs that work together to form a major function
single celled organisms; ie: bacteria
a rigid layer of nonliving material that surrounds the cell's or plants and some other organisms
a network of passageways that carries materials from one part of the cell to another
a gives animal cells' their shape
directs all of the cell's activities, including reproduction
after passing through the cell wall, this is the next barrier
strands that contain genetic material, instructions for directing the cell's functions
organelles that capture energy from sunlight and use it to produce food for the cell
small structures that function as factories to produce proteins
gelike fluid where a lot of organelles are found
structure and function in living things
cells are the basic units of...
obtaining oxygen, getting rid of wastes, obtaining food, and growing
the functions of an organism include
people to discover and learn about cells
The invention of the microscope made it possible for...
the cell theory states that...
all living thins are composed of cells; cells are the basic units of structure and function in living things; all cells are produced from other cells
support and protect the cell
a cell wall helps to...
prevents harmful materials from entering the cell
the cell membrane also...
control center directing all of the cell's activities
the nucleus is the cell's...
any subject that can't be broken down into smaller/simpler substances
an element is...
can't happen without water
most chemical reactions within cells...
carbohydrates, lipids, proteins, and nucleic acids
important groups of organic compounds in living things are...
important chemical reactions that take place in cells
the cell to use its own energy
active transport requires ___________ while passive transport doesn't
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