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While moving from cis cisternae to the trans cisternae, which molecule does not leave the cisternal lumen?(a) membrane proteins(b) procollagen(c) oligosaccharides(d) lysosomal proteinsI got this question in an online quiz.Question is taken from Cytoplasmic Membrane Systems topic in chapter Cytoplasmic Membrane Systems of Cell Biology

Answer»

Right OPTION is (b) procollagen

The explanation is: Procollagen molecules are the PRECURSORS of extracellular collagen found in FIBROBLASTS. They move from cis cisternae to the trans cisternae without ever LEAVING the cisternal LUMEN.



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