2. Answer the following questions A. Plants have no circulatory system?Then how cells manage intercellulartransport?B. Is nucleolus covered by membrane?C. Fluid mosaic model proposed by Singerand Nicolson replaced Sandwich modelproposed by Danielli and Davson?Why?D. The RBC surface normally showsglycoprotein molecules. Whendetermining blood group do they playany role?E. How cytoplasm differs fromnucleoplasm in chemical composition?​

JohkalSA JohkalSA Best Answer 1 year ago

wer of B is that nucleolus do not have any kind of MEMBRANE nor surrounding it The answer for E isNucleoplasm is the transparent semi-fluid ground substance formed of a mixture of proteins,enzymes (DNA and RNA polymerase), free nucleotide and some metal ions (Mg) for the synthesis of DNA and RNAs. it also contains histone and no-histone protein. So the nucleoplasm is slightly different from cytoplasm.The answer for D is ABO blood grouping is based on differences in the type of glycoprotein (protein with carbohydrates attached) present on the surface of red blood cells. An individual's ABO blood type is commonly determined by USING antibodies specific for type A and type B glycoproteins.The answer for C isthe model didn't got replaced by sandwich model here's why:The non polar protein portions would separate the polar portions of the PHOSPHOLIPIDS from WATER, causing the bilayer to dissolve. Meaning, the Davson-Danielle model is not only incorrect, but it is also impossible. ... Because of this, the phospholipid bilayer SANDWICHED on the inside would remain isolated from the water.

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