Which of the following mutations might confer a competitive advantage to an athlete by raising his or her hematocrit?

a. excess production of erythropoietin                       

b. decreased production of erythropoietin

c. EpoR that cannot bind STAT5                  

d. EpoR that cannot bind SHP1

e. EpoR that cannot bind JAK2

TLS Online TPP Program

#Question id: 12634

#Unit 6. System Physiology – Plant

During Brassinosteroid (BR) signal transduction pathway two forms exist,

1) In absence of Brassinolide

2) In presence of Brassinolide

a) BKI1 is phosphorylated and dissociates from the plasma membrane

b) BRI1 phosphorylation, and promotes BRI1–BAK1 heterodimerization, bringing their cytoplasmic domains together for interaction, transphosphorylation

c) BRI1 and BAK1 can form homodimers and both undergoes endocytosis and recycling

d) BIN2 kinases Phosphorylate transcriptional factor BES1 and BZR1 and these Phosphorylated proteins are shortlived and are degraded in the proteasome

e) BSK proteins activate BSU1 phosphatase which dephosphorylated BIN2 is degraded by the proteasome system

f) In absence of BIN2, dephosphorylated  transcriptional factor BES1 and BZR1 form heterodimers with different transcription factors and bind E-box sequences to activate genes.

Find out the correct match with in absence and presence of BL in BRs signal transduction pathway

TLS Online TPP Program

#Question id: 12635

#Unit 6. System Physiology – Plant

What is the role of BSK in Brassinosteroid signal transduction pathway?

TLS Online TPP Program

#Question id: 12636

#Unit 6. System Physiology – Plant

Which of the following is the correct prediction about Strigolactones?

TLS Online TPP Program

#Question id: 12637

#Unit 6. System Physiology – Plant

Strigolactones are synthesized from β-carotene , in which 9-cis-β-Carotene is coverted into the 9-cis-β-apo-10‘-carotenal by sequential cleavage  in the plastids by enzyme known as,

TLS Online TPP Program

#Question id: 12638

#Unit 6. System Physiology – Plant

strigolactone biosynthesis takes place , find the correct sequence of these signal transduction pathways;

a) D14* hydrolyses strigolactone and releases the products of hydrolysis. 

b) D14 disengages from the SCFMAX2 complex and returns to its original conformation, allowing it to respond to fresh strigolactone signal.

c) D14* interacts with the F-box protein MAX2 and the other partners of the SCFMAX2 ubiquitin ligase complex.

d) The α-/β-fold hydrolase D14 binds and reacts with strigolactone, changing its conformation to the active form, D14*

e) Target protein(s) are recognized by the D14*–SCFMAX2 complex and are ubiquitinated

TLS Online TPP Program

#Question id: 12639

#Unit 6. System Physiology – Plant

Strigolactones are transported out of sites of synthesis via plasma membrane and have been shown to move in the xylem from root to shoot by which transporter?