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TLS Online TPP Program

#Question id: 550

Which of the following statements is false?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. A reaction may not occur at a detectable rate even though it has a favorable equilibrium.

  2. After a reaction, the enzyme involved becomes available to catalyze the reaction again.

  3. For S -> P, a catalyst shifts the reaction equilibrium to the right.

  4. Lowering the temperature of a reaction will lower the reaction rate.

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TLS Online TPP Program

#Question id: 19879

#Unit 13. Methods in Biology

Which of the following enzyme is used to cut DNA molecules in rDNA technology
TLS Online TPP Program

#Question id: 24528

#Unit 11. Evolution and Behavior

What are the components of fitness is____
TLS Online TPP Program

#Question id: 29111

#Unit 8. Inheritance Biology

A plant with purple flowers is crossed with a plant with white flowers, and the F1 are self-fertilized to produce 105 F2 progeny with purple flowers and 45 with white flowers.
A scientist hypothesized that there are two genes with identical functions that control the dominant trait. The scientist also proposed that the two genes are not linked. The scientist carried out a chi-square test to test the hypothesis. Which one of the following options is the correct chi-square value obtained by the scientist?
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: 2508

#Unit 2. Cellular Organization

If you treated cells with a drug that interferes with microtubules, such as colchicine, which of the following would result?

A. Cell shape would be disrupted.

B. Mitosis and meiosis would not occur.

C. The intracellular location of organelles would be disrupted.