Topic 3- parts of cell

Question 1

nucleus

Answer 1

controlling centre
site of rRNA synthesis and assembly of ribosome subunits
regulates: mitosis
- cell cycle progression
- stress response
- biogenesis of RNP complexes

Question 2

ribosomes

Answer 2

made of RNA and protein
found free in cytoplasm/ attached to ER
site of protein synthesis

Question 3

rough ER

Answer 3

many ribosomes attached to surface
aids cell compartmentalisation
transports proteins synthesised at ribosomes towards golgi bodies for secretory packaging
system of interconnected membrane bound flattened sacs

Question 4

smooth ER

Answer 4

series of flattened sacs and sheets
sites of synthesis of steroids and lipids
like rough ER but no attached ribosomes