Practice Questions

TLS Online TPP Program

#Question id: 10376

Symbiotic nitrogen-fixing rhizobia release nodulation (Nod) factors as signaling agents as they near the surface of a legume root. The interaction between specific nod factors and their corresponding receptors. Which of the following statements is incorrect?

#Unit 6. System Physiology – Plant

Nod factors are lipochitin oligosaccharides that bind to a specific class of receptor-like kinases (RLKs) in a species-specific manner
The receptor has two heterodimer, Nod factor receptor 1 and 5 (NFR1 and NFR5). Both have three extracellular LysM domains
Nod factor receptors (NFRs) contain extracellular LysM motifs, initiates an interaction with the conserved SYMRK receptor-like kinases containing a leucine-rich repeat (LRR) domain
The interaction between NFR and SYMRK initiates calcium spiking in the cytosol, presumably via a second messenger molecule

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TLS Online TPP Program

#Question id: 18222

#Unit 9. Diversity of Life Forms

Which event during the evolution of land plants probably made the synthesis of secondary compounds most beneficial?

TLS Online TPP Program

#Question id: 624

#Unit 1. Molecules and their Interaction Relevant to Biology

The following data were obtained in a study of an enzyme known to follow Michaelis-Menten kinetics: The Km for this enzyme is approximately:

TLS Online TPP Program

#Question id: 26906

#Unit 10. Ecological Principles

Match the Indian Biosphere reserves (Column P) with the key fauna (Column Q) they are intended to protection

Which one of the following options has all correct matches between column P and Q?

TLS Online TPP Program

#Question id: 26466

#Unit 3. Fundamental Processes

Which of the following protein act as alarm and responsible for the production the “alarmone”

TLS Online TPP Program

#Question id: 29563

#Unit 6. System Physiology – Plant

Biotrophic pathogens and diseases associated with them are given