Practice Questions

TLS Online TPP Program

#Question id: 4947

The first genes on Earth were probably

#Unit 11. Evolution and Behavior

DNA produced by reverse transcriptase from abiotically produced RNA.
DNA molecules whose information was transcribed to RNA and later translated in polypeptides.
auto-catalytic RNA molecules.
RNA produced by autocatalytic, proteinaceous enzymes.

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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: 12408

#Unit 6. System Physiology – Plant

Cleavage of the carotenoid by the enzyme NCED (9-cis-epoxycarotenoid dioxygenase) is a rate-limiting highly regulated step in ABA synthesis that produces the 15-carbon precursor molecule xanthoxin in

TLS Online TPP Program

#Question id: 12517

#Unit 6. System Physiology – Plant

Synthesis of violaxanthin is catalyzed by an enzyme known as__

TLS Online TPP Program

#Question id: 12520

#Unit 6. System Physiology – Plant

During the biosynthesis of precursor All-trans-β-carotene is isomerized to 9-cis-β-carotene by ____A_____While 9-cis-β-Carotene is cleaved by carotenoid cleavage_____B_______ to produce_____C______.

TLS Online TPP Program

#Question id: 12521

#Unit 6. System Physiology – Plant

Which of the following enzyme of ABA biosynthesis function as a rate limiting enzyme?

TLS Online TPP Program

#Question id: 12522

#Unit 6. System Physiology – Plant

The receptor of ABA such as PYR/PYL/RCAR are the member of the ___