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SCIENCE
Cell Parts and Function Test
17
Science
7th Grade
10/22/2012

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Cards

Term
cell membrane
Definition
  • a phospholipid layer that covers a cell's surface
  • acts like a barrier between the inside of the cell and the cell's environment
  • allows nutrients in and waste products out
Term
cell wall
Definition
a structure made from cellulose that surround the cell membrane of some cells and provides strength and support to the cell
Term
chloroplast
Definition
  • found in plants and algae
  • make food using the energy of the sun
Term
chlorophyll
Definition
  • chemical found in chloroplasts that traps light energy
  • makes chlorophyll green
Term
DNA
Definition
heredity material found in the nucleus of the cells
Term
endoplasmic reticulum
Definition
  • looks like flattened sacks stacked side by side or like a cloth folded back and forth
  • transports material from the nucleus to other parts of the cell
Term
golgi complex
Definition
processes and transports material received from the endoplasmic reticulum out of the cell by using small compartments callsed vesicles
Term
lysosomes
Definition

digests food particles, wastes, old cell parts and other foreign invaders

 

Term
mitochondria
Definition
  • breaks down food molecules to make ATP (energy)
  • bean shaped organelle that is surrounded by two membranes
Term
nucleus
Definition
  • the most visible organelle when looking through a microscope
  • contains the cell's DNA
  • control center of the cell
Term
ribosome
Definition
  • site where amino acids are hooked together to make proteins
  • only organelle in eukaryotic cells that is not covered by a membrane
  • smallest most abundant organelle
Term
vacuole
Definition
  • membrane covered chamber that stores food, water and other materials
  • the pigment in vacuoles is what gives some plants their color
  • makes celery crisp
Term
multicellular
Definition
organisms that are composed of more than one cell
Term
unicellular
Definition
organisms that are composed of only one cell
Term
organelles
Definition
specialized structures which carry out the cell's life processes
Term
cytoplasm
Definition
jelly-like fluid inside of the cell
Term
nucleolus
Definition
stores the materials that will be used later to make ribosomes in the cytoplasm
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