UVic BIOL 225 Topic 3 Prep Exam
Questions Fully Answered.
prokaryotes - Answer lack membrane bound organelles
animal cell - Answer eukaryotic cell compartmentalized into organelles
plant cell - Answer
centrifugation of organelles - Answer separation is based on size and density of organelles,
organelles are enriched in each fraction, but not purified
role of plasma membrane - Answer protection, controls what enters the cell, one or more lipid bilayers
surround the organelles
origin of the nucleus and ER - Answer infolding of the cell membrane, surrounded free DNA in an
ancient prokaryotic cell
origin of mitochondria - Answer anaerobic cell engulfed an aerobic prokaryotic cell, became
endosymbiotic
nucleus - Answer contains almost all DNA in eukaryotic cell, site of DNA replication, RNA transcription,
RNA processing and ribosome assmebly
-surrounded by nuclear envelop that is continuous with ER
subcellular compartment - Answer nucleolus, inside of nucleus
chromatin - Answer unwound chromosome, when wound up may measure 10+ cm
- how DNA is packaged can regulate gene expression
, histone - Answer 2 units of each of H2A, H2B, H3 and H4, and a linker region
nucleosome - Answer Bead-like structure in eukaryotic chromatin, composed of a short length of DNA
wrapped around a core of histone proteins
Heterochromatin - Answer heavily condensed chromatin
euchromatin - Answer lightly packed chromatin
epigenetics - Answer how the chromosome packs is heritable
nuclear envelop - Answer surrounded by a double membrane
-this membrane is continuous with the endoplasmic reticulum
nuclear pore complex - Answer represents gated transport, where small water soluble molecules
diffuse passively while larger molecules are actively transported
nuclear lamina - Answer -made up of nuclear lamins,
-gives structure and shape to nuclear envelop
-anchored to NPC's and membrane proteins
-interacts directly with chromatin
endoplasmic reticulum - Answer continuous with nucleus, important for intracellular Ca+ storage,
production of transmembrane proteins and lipids for most organelles
-makes most proteins destined for secretion or lumen of ER
Rough ER - Answer ribosomes give it rough appearance, site of PROTEIN PRODUCTION and LIPID
SYNTHESIS
Smooth ER - Answer involved in LIPID METABOLISM, detoxification of lipid soluble drugs,
Questions Fully Answered.
prokaryotes - Answer lack membrane bound organelles
animal cell - Answer eukaryotic cell compartmentalized into organelles
plant cell - Answer
centrifugation of organelles - Answer separation is based on size and density of organelles,
organelles are enriched in each fraction, but not purified
role of plasma membrane - Answer protection, controls what enters the cell, one or more lipid bilayers
surround the organelles
origin of the nucleus and ER - Answer infolding of the cell membrane, surrounded free DNA in an
ancient prokaryotic cell
origin of mitochondria - Answer anaerobic cell engulfed an aerobic prokaryotic cell, became
endosymbiotic
nucleus - Answer contains almost all DNA in eukaryotic cell, site of DNA replication, RNA transcription,
RNA processing and ribosome assmebly
-surrounded by nuclear envelop that is continuous with ER
subcellular compartment - Answer nucleolus, inside of nucleus
chromatin - Answer unwound chromosome, when wound up may measure 10+ cm
- how DNA is packaged can regulate gene expression
, histone - Answer 2 units of each of H2A, H2B, H3 and H4, and a linker region
nucleosome - Answer Bead-like structure in eukaryotic chromatin, composed of a short length of DNA
wrapped around a core of histone proteins
Heterochromatin - Answer heavily condensed chromatin
euchromatin - Answer lightly packed chromatin
epigenetics - Answer how the chromosome packs is heritable
nuclear envelop - Answer surrounded by a double membrane
-this membrane is continuous with the endoplasmic reticulum
nuclear pore complex - Answer represents gated transport, where small water soluble molecules
diffuse passively while larger molecules are actively transported
nuclear lamina - Answer -made up of nuclear lamins,
-gives structure and shape to nuclear envelop
-anchored to NPC's and membrane proteins
-interacts directly with chromatin
endoplasmic reticulum - Answer continuous with nucleus, important for intracellular Ca+ storage,
production of transmembrane proteins and lipids for most organelles
-makes most proteins destined for secretion or lumen of ER
Rough ER - Answer ribosomes give it rough appearance, site of PROTEIN PRODUCTION and LIPID
SYNTHESIS
Smooth ER - Answer involved in LIPID METABOLISM, detoxification of lipid soluble drugs,
