TLS Online TPP Program

#Question id: 20314


Conversion of cholesterol to pregnenolone is mediated by the 

#Unit 7. System Physiology – Animal
  1. 17a-Hydroxylase (P450 c17) 
  2. Cholesterol desmolase (P450 scc)
  3. 17, 20 Lyase (P450 c17)
  4. Aldosterone synthase (P450 c11AS)
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TLS Online TPP Program

#Question id: 10763

#Unit 6. System Physiology – Plant

In mevalonic acid pathway, three molecules of acetyl-CoA are joined together stepwise to form mevalonic acid, which intermediate steps it will perform to yield isopentenyl diphosphate (IPP2)?

TLS Online TPP Program

#Question id: 19385

#Unit 12. Applied Biology

Which bacterium strain has CP4 has a glyphosate tolerant EPSPS enzyme. This EPSPS gene was transferred into soybean.

TLS Online TPP Program

#Question id: 4206

#Unit 3. Fundamental Processes

Ribosomal protein synthesis is controlled by inhibitor proteins, the genes of which are located on the ribosomal protein operon, and which bind to __ when ribosome assembly slows and bind to __ when ribosome assembly is proceeding at a steady rate.

TLS Online TPP Program

#Question id: 3830

#Unit 3. Fundamental Processes

Why is DNA damage in skin cells from exposure to excessive UV light not completely reversed by photoreactivation?

TLS Online TPP Program

#Question id: 10148

#Unit 6. System Physiology – Plant

How light controls the assembly of chloroplast enzymes into supramolecular complexes?

a.) Light regulates the stability of the ternary complex through the ferredoxin–thioredoxin system

b.) Reduced thioredoxin cleaves the disulfide bonds of both phosphoribulokinase and CP12, releasing glyceraldehyde-3-phosphate dehydrogenase and phosphoribulokinase in the catalytically active conformations

c.) Oxidised thioredoxin cleaves the disulfide bonds of both phosphoglyceratekinase and CP12, releasing glyceraldehyde-3-phosphate dehydrogenase and phosphoglyceratekinase in the catalytically active conformations

d.) thioredoxin system oxidised the disulfide bonds and reduces the assembly of between chloroplast enzymes and CP12 and converted into the catalytically active conformations

Which of the following statement is correct?