Practice Questions

TLS Online TPP Program

#Question id: 10209

Protection against photodamage is a multilevel process, excited state of chlorophyll is not rapidly quenched by photochemistry it can react with molecular oxygen to form toxic photoproducts such as as singlet oxygen (1 O2*) what can damage if this second line of defense also fails to eliminate the reactive photoproducts?

#Unit 6. System Physiology – Plant

the photoproducts can damage the LHC I protein of PSI, this damage leads to photoinhibition
the photoproducts can damage the D2 protein of PSI, this damage leads to photoinhibition
the photoproducts can damage the LHC II protein of PSII, this damage leads to photoinhibition
the photoproducts can damage the D1 protein of PSII, this damage leads to photoinhibition

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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: 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: 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: 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;

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: 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: 19081

#Unit 6. System Physiology – Plant

Oomycetes (fungus‐like organisms), brown algae and mammalian parasites as Plasmodium falciparum and fungi can be__

a) Biotrophic plant pathogens

b) Necrotrophic plant pathogens

c) Hemibiotrophic plant pathogens