Protein Structure
Sickle cell disease is due to

None of these
a mutation in the alpha chain of Hb
infection with a parasite
a mutation in the beta chain of Hb

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Protein Structure
Metastasis involves

ability of cells to dissolve cellular matrix
metalloprotein levels
All of these
decreased levels of proteins that regulate metalloproteins

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Protein Structure
Cyclins are proteins that

regulate apoptosis of damaged cells
regulate ability of cells to invade tissue
None of these
regulate passage from one stage of cell division to another

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