False about nucleolus:
Ans. a (Contains DNA). (Ref. Harper, Biochemistry, 25,h/pg. 402)# Nucleus of eukaryotes contain DNA organized into separate chromosomes which are interconnected by lamina and covered by nuclear envelope made-up of inner and outer nuclear membrane.# Nucleolus is a region in nucleus containing genes for 3 ribosomal RNA and it has no limiting membranes.Cell Organelle Cell organelleFunctions1RER- Protein synthesis by membrane bound ribosomes.2SER- Lipid synthesis. -Drug metabolism.3Golgi apparatus- Packaging secretory proteins and lysosomal enzymes. (MH'2006)- "Sorting of proteins" also4Plasma membrane- Surface receptors, -Transport mechanism.5Peroxisomes- Oxidation leading to H2O2 and then water.6Lysosomes- Proteolytic enzymes, -Esterases and -Glycosidases.- Vitamin A toxicity effects7Mitochondria- Fatty acid oxidation, -Urea cycle enzymes (some), -Ketone body synthesis,- TCA cycle, -ETC, -Apoptosis (initiation phase)8Cytosol- Glycosis, -Pentose shunt, -Neoglucogenesis (except glucose-6 phosphatase in ER), and- Lactate dehydrogenase.
Contains DNA
Contains RNA
Contains genes for ribosomes & ribosomal RNA needed in protein synthesis
Has no limiting membrane
General