Q.31
Fish Physiology and Biochemistry- ICAR JRF/SRF 2024
MCQ (Single Correct) +4 −1
Biological evolution by natural selection is when genes . individuals and populations
EXPLANATION Environmental Stress Physiology: Hypoxia, Hypercapnia, Stress Proteins (HSPs) and Antifreeze Glycoproteins (AFGPs)
  • Mechanism of Biological Evolution by Natural Selection:
  • Natural selection operates across hierarchical levels of biological organization:
  • Genes mutate: Random DNA mutations create novel genetic variation.
  • Individuals are selected: Differential survival and reproductive fitness act on individual phenotypes.
  • Populations evolve: Allele and genotype frequencies shift collectively over generations within the breeding population.
    • Correct Option: Option 4 (mutate; are selected; evolve).

Explanation not matching this question? क्या व्याख्या इस प्रश्न से मेल नहीं खा रही? Report
Want to practice this paper in exam conditions? क्या आप परीक्षा जैसे माहौल में अभ्यास करना चाहते हैं? Test yourself in 5-question batch format with timer and hidden answers. 5-प्रश्नों के बैच फॉर्मैट, टाइमर और छिपे उत्तरों के साथ खुद को परखें।
Start Practice Mode → प्रैक्टिस टेस्ट मोड शुरू करें →

Fish Physiology and Biochemistry विषय एवं अध्याय

विषय एवं पाठ्यक्रम के अनुसार सभी अध्याय देखें

Fish Biochemistry

4 टॉपिक्स
Analytical Biochemical Techniques: Spectrophotometry, Gas Chromatography, Affinity Chromatography and Mass Spectrometry Chemistry of Biomolecules: Carbohydrates, Lipids, Fatty Acids (EPA, DHA) and Amino Acid Stereochemistry Enzyme Kinetics: Michaelis-Menten Parameters (Km, Vmax), Catalytic Mechanisms and Coenzymes vs Cofactors Vitamins and Trace Minerals: Biological Functions, Enzyme Active Centers (Zinc, Pyridoxal Phosphate, Vitamin K)

खंड अ: सामान्य कृषि

6 टॉपिक्स
शस्य विज्ञान, जुताई एवं फसल उत्पादन कृषि कीट विज्ञान, सूत्रकृमि विज्ञान एवं फसल सुरक्षा मृदा विज्ञान, पादप पोषण एवं सुधार कोशिका विज्ञान, पादप कार्यिकी एवं जैव रसायन कृषि मौसम विज्ञान एवं जलवायु विज्ञान फसल आनुवंशिकी, पादप प्रजनन एवं आईपीआर

Introduction to Fish Physiology

4 टॉपिक्स
Environmental Stress Physiology: Hypoxia, Hypercapnia, Stress Proteins (HSPs) and Antifreeze Glycoproteins (AFGPs) सक्रिय Branchial Respiration, Countercurrent Gas Exchange and Mitochondrial-Rich Chloride Cells in Gill Epithelium Nitrogen Excretion Strategies: Ammoniotelism vs Ureotelism, Branchial Ammonia Flux and Ammonia Detoxification Osmoregulation & Excretion: Prime Ion Transporters (Na+/K+-ATPase, NKCC), Freshwater vs Saltwater Strategies

Metabolism of Biomolecules

5 टॉपिक्स
Carbohydrate Metabolic Pathways: Glycolysis, Pentose Phosphate Pathway, Gluconeogenesis and Citric Acid Cycle Energetics Amino Acid & Protein Metabolism: Transamination (ALT, AST), Oxidative Deamination, Urea Cycle and Branched-Chain Catabolism Metabolic Endocrinology & Signaling: Insulin, Glucagon, Cortisol Dynamics and Orexigenic/Anorexigenic Neuropeptides Lipid Metabolism: Acyl-CoA Activation, Carnitine Shuttle, Mitochondrial Beta-Oxidation and Prostaglandin Synthesis Nucleic Acid Metabolism: De Novo and Salvage Pathways of Purine and Pyrimidine Biosynthesis

Reproductive Physiology and Endocrinology

5 टॉपिक्स
Fish Sex Determination, Environmental Sex Reversal (Temperature/Aromatase Cyp19a1a), Hermaphroditism and Sex Chromosomes (ZW/XY) Oogenesis, Vitellogenin Uptake, Cortical Alveoli Dynamics, Chorion Hardening and Spawning Biology Brain-Pituitary-Gonadal Axis: GnRH, Gonadotropins (FSH, LH), Kisspeptin and Pineal Photoperiodic Transduction Spermatogenesis, Sertoli Cell Dynamics, Milt Hydration and Teleost Acrosome Absence Crustacean Neuroendocrinology: Sinus Gland / X-Organ Complex and Crustacean Hyperglycemic Hormone (CHH) Family
Official PYQ Papers

Previous Year Papers of Fish Physiology and Biochemistry

Practice official shift-wise question papers with answer keys and detailed explanations on the actual exam pattern.

1
Total Available Previous Papers

Choose Exam

Exam Directory

Browse official Previous papers and mock tests

10 Major Agriculture Exams Available

RPSC Agriculture Exams

5 Exams
Food Safety Officer Assistant Agriculture Officer Agriculture Officer RPSC Agriculture Research Officer RPSC AARO

RSSB Agriculture Exams

1 Exam
कृषि पर्यवेक्षक (RSSB)

National & PG Entrances

4 Exams
ICAR AIEEA PG CUET UG Rajasthan Agriculture Pre-PG
ICAR JRF/SRF Active