Phenylketonuria (PKU) is caused by___

I-Mutation of the gene for phenylalanine hydroxylase

II-tetrahydrobiopterin (BH4) deficiency

III-mutation in dihydroxyphenylalanine 

IV-due to the substitution mutation in tetrahydrobiopterin

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#Question id: 26877

#Unit 10. Ecological Principles

How the Plant species richness with field age is related

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#Question id: 11677

#Unit 7. System Physiology – Animal

Which of the following contribute to maintaining the high osmolarity of the renal medulla?

I) active transport of salt from the upper region of the ascending limb

II) the spatial arrangement of juxtamedullary nephrons

III) diffusion of urea from the collecting duct

IV) diffusion of salt from the descending limb of the loop of Henle

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#Question id: 12575

#Unit 10. Ecological Principles

All of the following are adaptations that permit the camel to be active by day in the desert EXCEPT 

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#Question id: 31081

#Unit 4. Cell Communication and Cell Signaling

Which of the following enzyme converts PIP into PIP2?

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#Question id: 23046

#Unit 12. Applied Biology

Which of the following major technique is not employed during in situ bioremediation?