Dark grown Arabidopsis seedlings show ‘triple response’ when exposed to ethylenehormone. Which one of the following options is characteristic of ‘triple response’? (1) Reduced shoot elongation, increased shoot thickness and […]
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CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Using Triple Response Morphology in Genetic Screens to Decipher Ethylene Signaling Pathways
Typical morphological defects are routinely used in genetic screens to identify novel genes in signal transduction pathways. Which one of the following morphology has been used to decipher the ethylene […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Key Features of Ethylene-Induced Triple Response in Dark-Grown Seedlings
Dark-grown seedlings display ‘triple response’ when exposed to ethylene. Which one of the fallowing is NOT a part of ‘triple response’? (1) Decrease in epicotyl elongation. (2) Rapid unfolding and […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Cytokinin Mimicking det1 Mutation
Which of the following plant hormones can mimic the det1 mutation, causing de-etiolation and chloroplast development in dark? (1) Cytokinin (2) Gibberellin (3) Auxin (4) Ethylene Correct answer: […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Ethylene Receptor Binding and CTR1 Kinase Activation in Plant Ethylene Signaling
Ethylene binding to its receptor does lead to (1) activation of the receptor (2) phosphorylation of the receptor (3) activation of CTR Raf kinase (4) activation of Ethylene insensitive factor […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Role of Phytochrome Interacting Factor (PIF) in Gibberellic Acid Sensitivity and Mutant Identification
While screening an EMS-mutagenized population of a plant, a researcher identified a mutant with reduced gibberellic acid sensitivity. Which one of the following proteins is most likely to be defective […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
DELLA and GID1 Interactions in Gibberellin Signal Transduction Pathway
Following are certain statements regarding gibberellic acid (GA) signal transduction: (A) DELLA proteins negatively regulate GA signalling. (B) Degradation of GA receptor (GID1) is mediated by DELLA proteins. (C) Ubiquitination […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Arabidopsis SLEEPY1 Mutant and Its Effects on Gibberellin Signaling Pathway
A researcher developed a mutant of Arabidopsis plant where the function of SLEEPY 1 (SLY1) containing SCF complex has been disrupted. Which one of the following statements is INCORRECT in […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Role of DELLA and GRAS Proteins in Plant Height Regulation
Examples of many factors that regulate plant height in response to gibberellic acid (GA) are listed below: A. Binding of a GA bound repressor to the promoter of the DELLA […]
CSIR NET Life Science Previous Year Questions and Solution Plant Hormones
Zinc Finger Motif of GREB Transcription Factor in Gibberellin Signaling
Most of DNA binding protein binds to DNA by particular motif to modulate gene expression. Genes which are under regulation of gibberllin acid have GRE which is recognized by transcription […]
