question_answer 24)

  Which of the following is not true of a eukaryotic cell? (a)Cellwallismadeupofpeptidoglycans (b) It has 80S type of ribosome present in the cytoplasm (c) Mitochondria contain circular DNA (d) Membrane bound organelles are present

Answer:

                  (a) A cell wall made up of peptidoglycan is found in bacteria and not in eukaryotes. Eukaryotic cell wall is made up of cellulose hemicellulose, pectin chitin etc. Thus, is nottrue for eukaryotic cell. In eukaryotes ribosomes present in cytoplasm is of 80S type but the ribosome in mitochondria is of 70S type, which represents the type present in prokaryotic cell. In eukaryotes cell organelles are highly complex and membrane bound and themitochondria in eukaryotes bear a separate circular DNA.