A) plasma membrane
B) ribosome
C) chromosome
D) nucleolus
Correct Answer: A
Solution :
As per fluid mosaic model of plasma membrane, the cell membrane consists of a highly viscous fluid matrix of two layers of phospholipid molecules. Ribosome mainly consists of r-RNA and protein. Chromosome is made up of DNA and basic proteins wheras nucleolus mainly consist of \[r-\]RNA.
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