In a certain enzyme-catalyzed reaction the following steps occur:

1. A phosphate group on substrate A is transferred to a side chain of an active site residue of the enzyme.

2. The dephosphorylated form of substrate A dissociates from the enzyme.

3. Substrate B enters the active site and is phosphorylated with simultaneous regeneration of the enzyme in its original form.

What kind of kinetic mechanism is described?

TLS Online TPP Program

#Question id: 19080

#Unit 6. System Physiology – Plant

Which type of pathogens produces cell wall‐degrading enzymes tend to attack a broad range of plant species?

TLS Online TPP Program

#Question id: 19079

#Unit 6. System Physiology – Plant

Pathogen evades plant by penetration of surface layers directly using mechanical pressure or enzymatic attack, some pass through natural openings, such as stomata or lenticels, and others only enter through wounded tissue. Once inside the plant, one of three main attack strategies is deployed specific feature of interaction given;

A) Necrotrophy

B) Biotrophy

C) Hemibiotrophy

i) where the plant cells remain alive throughout infection

ii) where the plant cells are killed in advance of infection 

iii) extensive plant tissue damage at initial stages

iv) where the pathogen initially keeps cells alive but at later stages of the infection, kills them

Match the following

TLS Online TPP Program

#Question id: 19078

#Unit 6. System Physiology – Plant

Avirulence (Avr) genes, they are recognized by a cognate resistance gene. The Pseudomonas AvrPto effector causes avirulence on tomato (Solanum lycopersicum) because they carry__

TLS Online TPP Program

#Question id: 19077

#Unit 6. System Physiology – Plant

Race between effector and ETI evolution between plants and pathogens is an example of___

TLS Online TPP Program

#Question id: 19076

#Unit 6. System Physiology – Plant

Pathogen Pseudomonas  produces toxins which causes avirulence, known as

TLS Online TPP Program

#Question id: 19075

#Unit 6. System Physiology – Plant

Which of the following is the incorrect about effector trigger immunity?