Question
Biology Question on Cell: the unit of life
Which one of the following does not differ in E.coli and Chlamydomonas
A
Ribosomes
B
Chromosomal organisation
C
Cell wall
D
Cell membrane
Answer
Cell membrane
Explanation
Solution
E.coli (bacteria) is a prokaryote while Chlamydomonas (algae) is a eukaryote. Ribosomes of both groups differ being 70S in prokaryotes and 80S in eukaryotes. Prokaryotic chromosomes lack histone protein unlike eukaryotic ones. Cell wall organization also differs as bacterial cell wall is rich in muramic acid while algal cell wall is cellulosic. It is the cell membrane which has similar organization in both the groups.