In the absence of BRs, BRI1 and BAK1 can form inactive homodimers, which of the following activity is inhibited  these BRs receptor?

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#Question id: 28981

#Unit 7. System Physiology – Animal

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: 28982

#Unit 7. System Physiology – Animal

Tyrosine is transported into catecholamine-secreting neurons via

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#Question id: 28983

#Unit 7. System Physiology – Animal

Which of the following is the rate limiting step in synthesis of catecholamines?

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#Question id: 28984

#Unit 7. System Physiology – Animal

DOPA decarboxylase synthesized dopamine, which is transported into the vesicle for further synthesis by____

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#Question id: 28985

#Unit 7. System Physiology – Animal

Norepinephrine is formed by which of the following process?

I- hydroxylation followed by decarboxylation of tyrosine

II- by conversion of dopamine in presence of dopamine β -hydroxylase enzyme

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#Question id: 28986

#Unit 7. System Physiology – Animal

Epinephrine is formed by which of the following process ?