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Rhizobia Infection Process Quiz

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Questions and Answers

What is the primary function of the bacteroids?

To protect nitrogenase from oxygen (correct)
To translocate amides to shoots of host plants
To convert ammonia into amides
To generate ATP through respiration

What is the primary source of oxygen for bacteroids?

Host plant cells (correct)
Atmospheric oxygen
Oxygen released from nitrogenase
Respiration of infected nodule cells

What is the fate of ammonia released from bacteroids?

It is released into the soil
It is stored in the bacteroids
It is converted into nitrate
It is converted into amides or ureids (correct)

What is the role of xylem in the transport of nitrogenous compounds?

It transports amides or ureids from infected nodule cells to shoots (C) Signup and view all the answers

What determines the host specificity of Rhizobia and Bradyrhizobia?

The structure of lipochitooligosaccharides (C) Signup and view all the answers

What is the result of cross inoculation group cell signaling?

The host specificity of Rhizobia and Bradyrhizobia (A) Signup and view all the answers

What is the primary function of Nod factors?

To determine host specificity (D) Signup and view all the answers

Which of the following is an example of a host plant that is nodulated by Rhizobium leguminosarum biovar trifolii?

Clover (Trifolium) (D) Signup and view all the answers

What is the role of infected nodule cells in the nitrogen fixation process?

To convert ammonia into amides (C) Signup and view all the answers

What is the benefit of the interaction between Rhizobia and host legumes?

It fixes nitrogen from the atmosphere (D) Signup and view all the answers