TLS Online TPP Program

#Question id: 32145


Flattened out on helix surface of Major-groove proportions are found in

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. A DNA
  2. Z DNA
  3. B DNA
  4. C DNA
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TLS Online TPP Program

#Question id: 5338

#Unit 8. Inheritance Biology

Which one of the following is not true for a disease inherited as a sex-linked dominant in humans?

TLS Online TPP Program

#Question id: 12103

#Unit 10. Ecological Principles

Which of the following is a good description of an ecological niche? 

TLS Online TPP Program

#Question id: 18593

#Unit 11. Evolution and Behavior

Some important events in the history of life on Earth are given below.
A. First dinosaurs appeared.
B. First reptiles appeared.
C. First insect fossils appeared.
D. First toothed birds appearance.
E. First wingless insect appeared.
F. Mammals like reptile arise
Match the above with the geological time periods and choose the correct combination,

TLS Online TPP Program

#Question id: 854

#Unit 1. Molecules and their Interaction Relevant to Biology

Many conditions including type 2 diabetes, Alzheimer  disease, Huntington disease and parkinson disease are associated with the misfolding mechanism a soluble protein that is normally secreted from the cell is secreted in the missfold state and converted into an insoluble extracellular fibre the diseases are correctly referred to as

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;