TLS Online TPP Program

#Question id: 3032


Which of these statements about prokaryotes is correct?

#Unit 2. Cellular Organization
  1. Bacterial cells conjugate to mutually exchange genetic material.

  2. Their genetic material is confined within a nuclear envelope.

  3. They divide by binary fission, without mitosis or meiosis.

  4. Genetic variation in bacteria is not known to occur, nor should it occur, because of their asexual mode of reproduction.

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TLS Online TPP Program

#Question id: 12074

#Unit 7. System Physiology – Animal

Which of the following tends to increase potassium secretion by the cortical collecting tubule?

TLS Online TPP Program

#Question id: 10284

#Unit 6. System Physiology – Plant

Allosteric regulation of enzyme multisubunit or multiactive site shows cooperativity with the sigmoidal graph between substerate conc. v/s Activity,


a) Cell contain NADH, FADH2 and ATP, that inhibits the allosteric enzyme activity by lowering the affinity with its substate, graph shifts towards B from control

 b) A- shows low ATP, the Km for fructose 6-phosphate is relatively low, the affinity of the enzyme with its substate is relatively high

 c) Haemoglobin, Phosphofructokinase, Phosphate dehydrogenase complex, α-ketoglutarate dehydrogenase complex, these all enzymes shows characteristics of sigmoidal graph

 d) When ATP is high, Km for fructose 6-phosphate is greatly increased- this activity shown by B in the graph

 e) fructose 2,6-bisphosphate binds to its allosteric site on PFK-1, it increases the enzyme’s affinity for its substrate fructose 6-phosphate and reduces its affinity for the allosteric inhibitors ATP and citrate- shown in graph by A

 Which of the following  combination of the enzyme activity with its substate correctly shown;

TLS Online TPP Program

#Question id: 11078

#Unit 7. System Physiology – Animal

A child has been eating round candies approximately 1 and 1.5 cm in diameter and inhaled one down his airway blocking his left bronchiole. Which of the following will describe the changes that occur?


TLS Online TPP Program

#Question id: 19216

#Unit 12. Applied Biology

Agrobacterium respond to which plant phenolic compounds which are excreted by susceptible wounded plants.
1. Toluene
2. Acetosyringone 
3. Hydroxyacetosyringon
Which of the option have incorrect statement?

TLS Online TPP Program

#Question id: 18909

#Unit 13. Methods in Biology

What is the compound X-gal?