δ-Cadinene, Longifolene, Abietic Acid, Terpinolene, and -Pinene are the resin terpenoids that often contain cardiac glycosides produced by

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#Question id: 12519

#Unit 6. System Physiology – Plant

Some given  statements about biosynthesis of Abscisic acid ;

a) ABA is synthesized in almost all cells that contain chloroplasts or amyloplasts

b) ABA is a 15-carbon terpenoid, or sesquiterpenoid, which is synthesized in plants by an indirect pathway via 40-carbon carotenoid intermediates

c) Cleavage of the carotenoid by the enzyme NCED (9-cis-epoxycarotenoid dioxygenase) is a rate-limiting

d) Oxidation by ABA-8′-hydroxylases lead to ABA inactivation, ABA can also be inactivated by conjugation, but this is irreversible. Both types of inactivation are also tightly regulated.

Which of the following  combination from the above statements  is correct?

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#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______.

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#Question id: 12521

#Unit 6. System Physiology – Plant

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

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#Question id: 12522

#Unit 6. System Physiology – Plant

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

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#Question id: 12523

#Unit 6. System Physiology – Plant

PYR/PYL/RCAR protein subfamily is conserved among plants ranging from eudicots to mosses,  these subfamily is a receptor for ABA stress hormone. These are  showing  following characters such as;

a) PYRABACTIN RESISTANCE1 (PYR1) which shows resistance to the synthetic  sulfonamide compound pyrabactin, which mimics ABA action

b) They interact with PP2C phosphatases in an ABA-independent manner to regulate the downstream activity of serine/ threonine protein kinases of the Sucrose non-Fermenting Related Kinase2 (SnRK2) family

c) the proteins are located in both the cytosol and nucleus

d) They interact with PP2C phosphatases in an ABA-dependent manner to regulate the downstream activity of serine/ threonine protein kinases of the Sucrose non-Fermenting Related Kinase2 (SnRK2) family

Which of the following combination from the above statements is correct?

TLS Online TPP Program

#Question id: 12524

#Unit 6. System Physiology – Plant

PYR/PYL/RCAR  receptors  to permit or enhance interaction with PP2C and thereby repress PP2C phosphatase activity. This releases SnRK2 kinases from inhibition and allow to performing various function such as;

a) phosphorylating transcription factors that bind ABA Response Elements to inhibits the ABA responsive gene expression 

b) Allow phosphorylation  ion channels for regulating  stomatal aperture 

c) phosphorylating transcription factors that bind ABA Response Elements to activates the ABA responsive gene expression

which of the following is the correct statement  of  kinase activity ?