What is a Cell? Flashcards
1
Q
cell theory
A
- all organisms are composed of one or more cells
- the cell is the structural unit of life
- cells can arise only by division from pre-existing cells
2
Q
nucleolus
A
site or ribosomal RNA synthesis and subunit assembly
3
Q
nucleoplasm
A
non nucleolar regions of nucleus
4
Q
nuclear matrix
A
supportive structure of nucleus
5
Q
chromatin
A
genetic material plus associated proteins
6
Q
peroxisomes
A
- bounded by bilayer membrane
- site of degradation of fatty acids and toxic compounds
- oxidize materials to H2O2 and then to H2O + O2
- by-products used in cholesterol biosynthesis
7
Q
archea
A
extremophiles
8
Q
bacteria
A
prokaryotes not archea
