Inactive miRNA undergoes how many cleavages before incorporation into the RISC complex?

TLS Online TPP Program

#Question id: 12629

#Unit 6. System Physiology – Plant

During the biosynthesis of brassinosteroid derived from the sterol campesterol follows two types of the pathway

i) Late C-6 oxidation pathway

ii) Early C-6 oxidation pathway

follows  the different reaction performing in each  pathways such as,

a) Campesterol → Campestanol →6-Deoxoteasterone→ Castasterone→Teasterone →Brassinolide

b) Campesterol → 6-Oxocampestanol →Cathasterone →Teasterone → Castasterone →Brassinolide

c) Campesterol → Campestanol →6-Deoxocathasterone →6-Deoxoteasterone → Castasterone →Brassinolide

Find the correct combination of the each oxidation pathway with its performing sequences;

TLS Online TPP Program

#Question id: 12630

#Unit 6. System Physiology – Plant

Bioactive brassinosteroid levels are also modulated by a variety of inactivation or catabolic reactions, except;

a) epimerization

b) hydroxylation

c) Phosphorylation

d) Sulfonation

e) Ubiquitinylation

f) Conjugation to glucose or lipids

TLS Online TPP Program

#Question id: 12631

#Unit 6. System Physiology – Plant

The receptor  of brassinosteroid are the  largest class of plant receptor kinases, which is localize to the plasma membrane as transmembrane protein;

TLS Online TPP Program

#Question id: 12632

#Unit 6. System Physiology – Plant

In brief, brassinolide binding to the brassinosteroid receptor kinase present on the plasma membrane, these brassinosteroid receptor kinase is,

TLS Online TPP Program

#Question id: 12633

#Unit 6. System Physiology – Plant

In the absence of BRs, BRI1 and BAK1 can form inactive homodimers, which of the following activity is inhibited  these BRs receptor?

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