C3 undergo spontaneous hydrolysis to form C3a and C3b, but they have short half-before encountering the carbohydrate bacterial antigens only. Which of the following carbohydrate moieties present in the mammalian cells that inactivates C3b?

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#Question id: 8933

#Unit 9. Diversity of Life Forms

At which developmental stage should one be able to first distinguish a diploblastic embryo from a triploblastic embryo?

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#Question id: 2504

#Unit 2. Cellular Organization

The vertebrate skeleton is to bones as the cytoskeleton is to  ? 

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#Question id: 1644

#Unit 4. Cell Communication and Cell Signaling

What is the single best defining feature of a lymphocyte?

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#Question id: 12269

#Unit 7. System Physiology – Animal

If a woman hears her baby cry, she may experience milk ejection from the nipples even before the baby is placed to the breast. What is the explanation for this?

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#Question id: 28633

#Unit 2. Cellular Organization

Block the function of Rb by Phosphorylation on multiple sites, these phosphorylation is done by___