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TLS Online TPP Program

#Question id: 10308

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?

#Unit 6. System Physiology – Plant
  1. E→C→B→E→D
  2. A→D→B→E→C
  3. E→B→D→A→C
  4. D→A→E→B→C
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TLS Online TPP Program

#Question id: 13002

#Unit 3. Fundamental Processes

Where in a eukaryotic cell do you think you would find each of the following proteins residing when it is actively performing its function. Be as specific as you can in terms of subcellular location.
Match the following with the correct subcellular location;

 

I) Polymerases

 

 

a) In the cytoplasm

 

II) Ribosomal proteins

 

 

b) Inside the plasma membrane.

 

III) DNA ligase

 

 

c) In the mitochondrial matrix

 

IV) protein that allows ions to pass in and out of the cell

 

 

d) In the nucleus of cells

 

V) Activator protein

 

 

e) Inside the nuclear membrane

 

VI) an enzyme in the Krebs/TCA cycle

 

 

 

VII) a protein that forms a channel through which mRNAs can be exported into the cytoplasm

 

 

 

TLS Online TPP Program

#Question id: 12256

#Unit 10. Ecological Principles

Ant species X preys upon ant species Y. A researcher has the following set of observations regarding the behaviour of species X where aggression signifies a predatory response.

Which of the following statement(s) are correct regarding the behaviour of Species X?

(i)    A glass bead is sufficient to elicit the predatory response.

(ii)   Both chemical and non-chemical cues are involved in the predatory response.

(iii)  Chemical cues are necessary to elicit the predatory response.

(iv) Chemical cues are sufficient to elicit the predatory response
TLS Online TPP Program

#Question id: 12337

#Unit 10. Ecological Principles

Which of the following levels of organization is arranged in the correct sequence from most to least inclusive? 
TLS Online TPP Program

#Question id: 12682

#Unit 13. Methods in Biology

The Human Genome contains the blueprint for human development and maintenance, ultimately providing the means to understand ________.
TLS Online TPP Program

#Question id: 7456

#General Aptitude

How many times the hands of a clock will be in vertically opposite Directions from 10 AM to 10 PM.