TLS Online TPP Program

#Question id: 10414


Plants have evolved with multiple photoreceptors, Phytochrome is one of them. Which of the following statements is incorrect about these photoreceptors?

#Unit 6. System Physiology – Plant
  1. Phytochrome in the functionally active dimeric form with a molecular mass of about 250 kDa
  2. phytochrome chromophore is a linear tetrapyrrole and absorbed light called phytochromobilin
  3. Phytochromobilin is exported  to the cytosol where it autocatalytically attaches to the PHY apoprotein through a thioether linkage to a cysteine residue
  4. Phytochromobilin undergoes to the cis and trans isomerisation with its pyrrole ring around C-12 and C-13 after absorbing light
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TLS Online TPP Program

#Question id: 12644

#Unit 6. System Physiology – Plant

Which of the following plant hormone is synthesized from the lipids?

TLS Online TPP Program

#Question id: 12640

#Unit 6. System Physiology – Plant

Plant species produce a which type of  defensive proteins that bind to carbohydrates or carbohydrate-containing proteins. After being ingested by an herbivore, that bind to the epithelial cells lining the digestive tract and interfere with nutrient absorption

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: 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: 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