Protein Structure
Individuals with PKU disease are mentally retarded unless

phenylalanine in the diet is restricted
None of these
homogentisic acid in the diet is restricted
tyrosine in the diet is restricted

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Protein Structure
Metastasis involves

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

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Protein Structure
Cyclins are proteins that

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

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