You and your lab partner have isolated 20 new mutant yeast strains that are defective in synthesis of threonine, an amino acid. These Thr- mutants do not grow on minimal medium, but they do grow on minimal medium supplemented with threonine. Ten of your Thr- mutants (numbered 1 through 10) were isolated in a strain of mating type a (MAT a). The other 10 Thrmutants (numbered 11 through 20) were isolated in a strain of mating type α (MAT α). You and your lab partner cross each of the MAT a strains to each of the MAT α strains, and you include crosses to the appropriate wild-type strains. Your experimental observations are shown in the table below, where (-) indicates diploids that did not grow on minimal medium and (+) indicates diploids that did grow on minimal medium.

Which mutations are dominant?

TLS Online TPP Program

#Question id: 12624

#Unit 6. System Physiology – Plant

The immediate precursor of brassinolide is____

TLS Online TPP Program

#Question id: 12625

#Unit 6. System Physiology – Plant

Precursor of strigolactone biosynthesis  is___

TLS Online TPP Program

#Question id: 12626

#Unit 6. System Physiology – Plant

Strigolactone biosynthesis  takes place in____

TLS Online TPP Program

#Question id: 12627

#Unit 6. System Physiology – Plant

Strigolactones are synthesized from β-carotene,  synthesis of the intermediate carlactone, beyond which strigolactone biosynthesis diverges is takes place____

a) in a species-specific manner

b) in Non-species specific manner

c) Divergence is attributed to the functional diversity of MAX1 cytochrome P450 isoforms, which act on carlactone

d) Divergence is attributed to the functional diversity of MAX1 cytochrome P450 isoforms, which act on 5-Deoxystrigol

Which of the following combination from the above statement is true?

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;