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TLS Online TPP Program

#Question id: 10380

Two separate processes, the first involves a signaling pathway that facilitates the infection process itself and  the second involves the activation of a set of genes that regulate the formation of root nodules. Which of the following receptor is thought to participate in both processes?

#Unit 6. System Physiology – Plant
  1. NFR heterodimer only        
  2. symbiosis receptor-like kinase (SYMRK) Only
  3. serine/threonine protein kinases
  4. NFR heterodimer and SYMRK both
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TLS Online TPP Program

#Question id: 13189

#Unit 10. Ecological Principles

The relative abundance of C plant species increases with latitude because of the associated temperature gradient. A study in North America found that at  42°  North,  C3  plants  become more  abundant than  C4  plants. Given  an  increase in  mean global  temperatures by  10°C and no  other changes in  environmental conditions,  the latitude at which C3 plants become more abundant:
TLS Online TPP Program

#Question id: 6983

#Unit 5. Developmental Biology

In vertebrates, the heart forms from:
TLS Online TPP Program

#Question id: 13015

#Unit 10. Ecological Principles

Which of the following organisms is the most likely candidate for geographic isolation?  
TLS Online TPP Program

#Question id: 10231

#Unit 10. Ecological Principles

Character displacement is results of competition that its operates on a
TLS Online TPP Program

#Question id: 7264

#Unit 5. Developmental Biology

The Dictyostelia social amoebas are found in a wide range of soil habitats. They can come together to form a fruiting structure, in which a proportion of cells are sacrificed to build the stalk and the remainder differentiate into resilient dormant spores. This multicellular life cycle is common to all Dictyostelids. It consists of an interconnected programme of cell movement and cell differentiation, and has been intensively studied in the model organism D. discoideum. Few mutants (Column A) and phenotypes (Column B) are listed in the table given below.

    Column A

    Column B

A. Loss of function of cAMP-dependent protein kinase (PKA)

i. cell develop normally but unable to germinate

B. Loss of function of RegA

ii. Loose aggregate form

C. Loss of function of adenylate cyclase B

iii. No aggregation

D. Loss of function of gp80

iv. accumulation of cAMP and PKA activation

 Match the correct mutant with the observed phenotype.