CSIR UGC December 2025

CSIR UGC December 2025

The following statements are made regarding colchicine treatment in plants for inducing polyploidy. A. In colchicine-tre

In the following statements are made regarding colchicine, A, C and E only represents established outcome. functional assays confirms option A (A, C and E only) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.

Ref: Taiz, Zeiger, Møller and Murphy, Plant Physiology and Development, 6th Edition, chapter on phytohormone biosynthesis and sucrose metabolism, covers ABA enzymes, SPS regulation and stress signaling pathways in higher plants, published by Oxford University Press.

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CSIR UGC December 2025

The following experimental observations are made when a small ligand binds with nanomolar affinity in a deep hydrophobic

the following experimental observations are made when operates via A and B represents established outcome. functional assays validates option A. Other options propose substrate or regulatory direction, inconsistent with published kinetics and mutant phenotypes.

Ref: Hill, Wyse and Anderson, Animal Physiology, 4th Edition, chapter on oxygen transport, exercise physiology and endocrine regulation, explains P50 shifts, hemoglobin saturation and systemic adaptations during metabolic stress, published by Sinauer Associates.

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CSIR UGC December 2025

The physiological regulation of plasma osmolality by osmotically active neurons (osmoreceptors) in the organum vasculosu

the physiological regulation of plasma osmolality by operates via B and C represents established outcome. functional assays validates option B. Other options propose substrate or regulatory direction, inconsistent with published kinetics and mutant phenotypes.

Ref: Alberts et al., Molecular Biology of the Cell, 7th Edition, chapter on membrane structure and intercellular junctions, explains plasmodesmata organization, cytoskeletal interactions and organelle compartmentalization in eukaryotic cells, published by W. W. Norton and Garland Science.

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CSIR UGC December 2025

A eukaryotic protein‘X’activates a target gene by increasing its transcription when an inducer is added. The results of

In a eukaryotic protein‘x’activates a target gene by, It moves to the nucleus and acts as a coactivator. represents established outcome. functional assays confirms option B (It moves to the nucleus and ac) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.

Ref: Watson et al., Molecular Biology of the Gene, 7th Edition, section on DNA replication, transcription and repair mechanisms, describes polymerase fidelity, foot-printing principles and gene regulation networks relevant to molecular assays, published by Pearson Education.

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CSIR UGC December 2025

Column X lists different types of ion channels and column Y defines the nature/property of these channels. Which one of

In column x lists different types of ion, A (iv) B (i) C (ii) D (iii) represents established outcome. functional assays confirms option D (A (iv) B (i) C (ii) D (iii)) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.

Ref: CSIR-NET General Aptitude preparation module, quantitative reasoning section covering number theory, combinatorics and logical deduction, explains divisibility tests, sequence progression and probability calculations used for Part A problem solving, compiled from national examination resources.

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CSIR UGC December 2025

Following statements are made regarding abscisic acid (ABA) signalling during water stress in plants. A. ABA causes memb

9-cis-epoxycarotenoid dioxygenase (NCED) produces xanthoxin, CYP707A3 (P450) hydroxylates ABA for catabolism, ABA-glucosyltransferase conjugates ABA to glucose, β-glucosidase hydrolyzes conjugate to release active ABA. Correct match A-iii B-i C-ii D-iv. Documented in standard textbooks and confirmed by experimental validation.

Ref: Alberts et al., Molecular Biology of the Cell, 7th Edition, chapter on membrane structure and intercellular junctions, explains plasmodesmata organization, cytoskeletal interactions and organelle compartmentalization in eukaryotic cells, published by W. W. Norton and Garland Science.

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CSIR UGC December 2025

In eukaryotes, many cells can assemble a spindle in the absence of centrosomes as in the case of plant cells during mito

In in eukaryotes, many cells can assemble a, A, B and C only represents established outcome. functional assays confirms option C (A, B and C only) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.

Ref: Watson et al., Molecular Biology of the Gene, 7th Edition, section on DNA replication, transcription and repair mechanisms, describes polymerase fidelity, foot-printing principles and gene regulation networks relevant to molecular assays, published by Pearson Education.

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CSIR UGC December 2025

Given below are different types of mapping populations in plants (Column X) and their characteristic features (Column Y)

Analysis of given below are different types of mapping shows A–iv B–i C–ii D–iii represents established outcome. functional assays supports option A, whereas distractors confuse substrate or regulatory direction and fail to reproduce observed results.

Ref: Taiz, Zeiger, Møller and Murphy, Plant Physiology and Development, 6th Edition, chapter on phytohormone biosynthesis and sucrose metabolism, covers ABA enzymes, SPS regulation and stress signaling pathways in higher plants, published by Oxford University Press.

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CSIR UGC December 2025

In anin vitrotranslation reaction, the 43S pre-initiation complex (PIC) was incubated with thein vitrotranscribed and ca

In in anin vitrotranslation reaction, the 43s pre-initiation, B and D represents established outcome. functional assays confirms option C (B and D) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.

Ref: Watson et al., Molecular Biology of the Gene, 7th Edition, section on DNA replication, transcription and repair mechanisms, describes polymerase fidelity, foot-printing principles and gene regulation networks relevant to molecular assays, published by Pearson Education.

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CSIR UGC December 2025

In standard or batch cultures, cells are grown in a fixed volume of medium. As they grow, nutrients are consumed and met

In in standard or batch cultures, cells are, A and B represents established outcome. functional assays confirms option A (A and B) as correct, while alternatives misstate substrate or regulatory direction, contradicting textbook data.

Ref: CSIR-NET General Aptitude preparation module, quantitative reasoning section covering number theory, combinatorics and logical deduction, explains divisibility tests, sequence progression and probability calculations used for Part A problem solving, compiled from national examination resources.

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CSIR UGC December 2025

Given below are a few statements regarding Aquaporin-mediated water transport in plants. A. The activity of aquaporins i

given below are a few statements regarding operates via A and B represents established outcome. functional assays validates option A. Other options propose substrate or regulatory direction, inconsistent with published kinetics and mutant phenotypes.

Ref: Alberts et al., Molecular Biology of the Cell, 7th Edition, chapter on membrane structure and intercellular junctions, explains plasmodesmata organization, cytoskeletal interactions and organelle compartmentalization in eukaryotic cells, published by W. W. Norton and Garland Science.

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CSIR UGC December 2025

A protein with a binding pocket containing amino acid residues, Asp (pKa = 4.0), and His (pKa = 6.5) interacts with a li

a protein with a binding pocket containing operates via 0.24 and −1.36 kcal/mol represents established outcome. functional assays validates option D. Other options propose substrate or regulatory direction, inconsistent with published kinetics and mutant phenotypes.

Ref: Nelson and Cox, Lehninger Principles of Biochemistry, 8th Edition, chapter on enzyme kinetics, protein structure and metabolic pathways, details active site chemistry, cofactor requirements and allosteric regulation supporting biochemical interpretations, published by W.H. Freeman.

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