1.3 The Cell Flashcards
What is the basic unit of life?
the cell
What is the definition of cell?
smallest until of life that can carry out all activities associated with life
What is cell theory?
cells are the basic living units of organization and function in all organisms; cells come from other cells
What is a light microscopic?
device that passes light through a thin sample of the cell medium to make cells visible to the human eye
What are organelles?
parts within a cell
What are the bio macromolecules?
proteins
lipids
carbohydrates
nucleic acids
What can organelles be used for?
energy conversion and synthesis of compounds
What is the plasma membrane?
surrounding of cells that contains specialized pumps and gates that regulate the passage of materials in and out of the cell
What is the main reason cells need to remain small?
surface area to volume ratio
What are the two basic types of cells?
eukaryotic
prokaryotic
What types of cells are bacteria cells?
prokaryotic
Why are prokaryotic cells considered simple cells?
- small
- no nuclear membrane
- do not contain membrane bound organelles
What do both eukaryotic and prokaryotic cells contain?
plasma membrane
ribosomes
What are ribosomes composed of?
RNA
What is the main function of ribosomes?
synthesis proteins for use by the cell
