TLS Online TPP Program

#Question id: 3362


The Hardy-Wienberg principle comes from considering what happens when Medelian genes act on population. The model predicts that there will be no change in allele frequencies when

#Unit 11. Evolution and Behavior
  1. Migration into the population occurs at a steady rate

  2. The population suffers a bottle neck

  3. a rare new mutation is associated with a sharp increase in fitness

  4. no evolutionary process is at work

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TLS Online TPP Program

#Question id: 12628

#Unit 6. System Physiology – Plant

Brassinosteroids  biosynthesis precursor  is______

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?