Self Testing 

This part mainly related to quiz / MCQs / problem solving and solutions, fill in the blanks, matching question, short answer type, long answer questions, clarification on general misconceptions 

This learning part comes under Quadrant - IV of the UGC guidelines for E content Development 

Questions 

N2 Cycle and N2 fixation

1). Nitrogen gas is reduced to ammonia by nitrogen fixation method. In order to execute the process, which one of the following compounds is usually required? [CSIR June 2015]

1. ATP

2. GTP

3. UDP

4. ADP

2). Symbiotic nitrogen fixation in legumes nodules involves complex interaction between Rhizobium and legume roots. This complex interaction is governed by [CSIR June 2015]

A. Integration of sym plasmid of Rhizobium in the root nuclear genome

B. Sensing of plant flavonoids by rhizobia

C. Activation of nod genes in rhizobia

D. Activation of nodulin genes in legume roots.

Which one of the following combinations is correct?

1. A, B and C

2. A, C and D

3. B, C and D

4. A, B and D

3. The nodulation (nod) genes are classified as common nod genes or host specific nod genes. Some statements related to such classification are given below:[CSIR Dec2015]

A. nodA is a common nod gene and nodC is a host specific gene.

B. nodB is a common nod gene and nodP is host specific gene

C. nodQ is a common nod gene and nodA is host specific gene

D. nodH is a common nod gene and nodQ is a host specific gene.

Mycorrhiza

1. Which one of the following plant derived signaling molecules induces hyphal branching of arbuscular mycorrhizal fungi during initial colonization? [CSIR Dec2016]

 a) Salicylic acid

 b) Abscisic acid

 c) Strigolactones

 d) Lipo chitooligosaccharides

Answers 

N2 cycle and N2 fixation

1. Ans is 1; ATP 

2. Ans is 3; Sensing, activation of nod (in bacteria) and nodulin (in plants)

3. Ans is 4; nod genes are commonly present among all the species of Rhizobium 

Mycorrhiza

c) Strigolactones