Nitrogen is a major environmental pollutant of groundwater in many parts of the world. What is the major cause of this nitrogen accumulation in groundwater?

#Question id: 27972

#Unit 1. Molecules and their Interaction Relevant to Biology

This is the order of electron transfer in complex-I NADH - FMN - Fe-S – Q to Prevent electron transfer from Fe-S center to ubiquinone 

a. Myxothiazol

b. Rotenone

c. Amytal

d. Piericidin A

Which of the following can be used

#Question id: 4690

#Unit 3. Fundamental Processes

Which of the following  of the cleavage enzymes of rRNAs and tRNA is a ribozyme?

#Question id: 29482

#Unit 6. System Physiology – Plant

#Question id: 12633

#Unit 6. System Physiology – Plant

#Question id: 10308

#Unit 6. System Physiology – Plant

Oxidative decarboxylation of pyruvate to acetyl-CoA by the PDH complex, how the pyruvate dehydrogenase complex carries out the five consecutive reactions in the decarboxylation and dehydrogenation of pyruvate?

 A) Pyruvate reacts with the bound thiamine pyrophosphate (TPP) of pyruvate dehydrogenase, undergoing decarboxylation to the hydroxyethyl derivative

 B) A transesterification in which the —SH group of CoA replaces the —SH group of E2 to yield acetyl-CoA and the fully reduced (dithiol) form of the lipoyl group

 C) The reduced FADH2 of E3 transfers a hydride ion to NAD1 , forming NADH, the enzyme complex is now ready for another catalytic cycle

 D) The transfer of two electrons and the acetyl group from TPP to the oxidized form of the lipoyllysyl group of the core enzyme, dihydrolipoyl transacetylase, to form the acetyl thioester of the reduced lipoyl group

 E) Dihydrolipoyl dehydrogenase promotes transfer of two hydrogen atoms from the reduced lipoyl groups of E2 to the FAD prosthetic group of E3 , restoring the oxidized form of the lipoyllysyl group of E2

 Find out the correct sequence of action of this complex enzyme?