Keywords 1.0 (Cells ) Flashcards
Section 3 / Cell structure
Magnification
The number of times greater the size of an image is, greater than the actual size of the object.
Resolution
The minimum distance apart that two objects can be in order for them to appear as two separate items.
Fractionation
The process of breaking apart cells and separating their contents (including organelles) by homogenixation, and ultracentrifugation.
Eukaryotic
A cell that contains a membrane-bound nucleus and other membrane bound oragnelles.
Prokaryotic
A cell that does not contain a nucleus (or any membrane-bound organelles.) Bacteria are prokayotes.
Virus
An acelluar, non-living particle. These contain DNA or RNA held within a capsid but can only multiply inside a living host cell.
Nucleus
An organelle in eukaryotes that contains DNA in the form of protein bound linear chromosome (chromatin) and a nucleolus surrounded by a nuclear envelope.
Differentation
The process by which cells become specialized for different functions.
Interphase
A stage in the cell cycle when DNA replication occurs that take place before mitosis (or meiosis.)
Mitosis
A type of nuclear division in which two identical daughter cells are produced. Includes the stage prophase, metaphase, anaphase and telophase.