Cell organelles Flashcards
FUNCTION OF rough ENDOPLASTIC RETICULUM ?
translation and folding of new proteins
manufacture of lysosomal enzymes
site of N-linked glycosylation
FUNCTION OF smooth ENDOPLASTIC RETICULUM ?
steroid, lipid synthesis
examples of cells with extensive RER
pancreatic cells, goblet cells, plasma cells
examples of cells with extensive SER
adrenal cortex, hepatocytes, testes, ovaries
Golgi apparatus Modifies, sorts, and packages molecules that are destined for cell secretion what other function do they have ?
addition of mannose-6-phosphate to proteins
designates transport to lysosome
Mitochondrion Contains mitochondrial genome as ?
circular DNA
Nucleus role ?
DNA maintenance
RNA transcription
RNA splicing ( removes the intervening, non-coding sequences of genes (introns) from pre-mRNA and joins the protein-coding sequences (exons)
Lysosome role ?
Breakdown of large molecules such as proteins and polysaccharides
Nucleolus role ?
Ribosome production
Ribosome role ?
Translation of RNA into proteins
Peroxisome
Catabolism of very long chain fatty acids and amino acids
Results in the formation of hydrogen peroxide
Proteasome
Along with the lysosome pathway involved in degradation of protein molecules that have been tagged with ubiquitin