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CTG Wk2:
Week 2- Cell Theory and Nuclear Theory
Question | Answer |
---|---|
what are all cells bound by? | double plasma membrane of polar phospholipids |
what do all cells contain? | cytosol |
what do all cells need to maintain order and function? | free energy |
where is the genetic information stored mainly in prokaryotes? | single chromosome (nucleoid) |
where is additional genetic information stored in prokaryotes? | plasmids |
how many genes do prokaryotes have? | 1000-6000 genes |
describe prokaryote cell walls | rigid |
invaginate meaning? | folded to make a pouch or dip |
prokaryotic inner cell membranes can invaginate to form? | mesosomes |
mesosomes? | folded cell membrane invaginations |
where is nuclear genome from? | archaeal ancestor |
where is mitochondrial genome from? | alphaproteobacterial group |
where is chloroplast genome from? | cyanobacteria |
how is DNA stored | chromatin |
perinuclear space? | space between the inner and outer membranes of the nuclear membrane |
what is the inner membrane continuous with? | nuclear lamina |
nuclear lamina binds to what? | chromatin |
Nuclear Pore Complexes (NPCs)? | made of nucleoporins |
what do Nuclear Pore Complexes do? | bidirectional transport of molecules |
nuclear lamina? | array of protein filaments attached to the inner membrane of nuclear envelope |
role of the nuclear lamina? | attachment site for chromatin and cytoplasmic cytoskeleton, facilitation of DNA replication and RNA transcription and cell cycle regulation and apoptosis |
nucleolus? | non-membrane bound, the site of ribosomal RNA (rRNA) |