Q20. The major product formed in the following reaction is The major product is the five‑membered lactone (option C) formed by intramolecular esterification of the γ‑hydroxycarboxylic acid under acid catalysis. Introduction In […]
Tag: iit jam biotechnology previous year paper PYQ
Tag: iit jam biotechnology previous year paper PYQ
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Human Female Reproductive Cycle Sequence
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- December 26, 2025
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Q.19 The correct sequence of the following events in the human female reproductive cycle is I: Secretion of FSH II: Growth of corpus luteum III: Growth of follicle and oogenesis […]
When Does DNA Double in Eukaryotic Cell Division?
Q.18 During eukaryotic cell division, the amount of DNA doubles (A) between prophase and anaphase of mitosis (B) between prophase I and prophase II of meiosis (C) between the G1 […]
Nitrogenase of Diazotrophs
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- December 26, 2025
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Q.17 The nitrogenase of diazotrophs (A) contains Cu‑S center and uses 12 NADH to reduce one N₂ (B) contains one (4Fe‑4S) cluster and uses 8 FADH₂ to reduce one N₂ […]
Cell Organelles and Their Functions
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- December 26, 2025
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Q.16 Match the entries in Group I with that in Group II Group I P) Nucleolus Q) Spherosomes R) Peroxisomes S) Plasmodesmata Group II lipid storage breakdown of fatty acids […]
Adaptive Defense Mechanisms Against Predation
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- December 26, 2025
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Q.15 Which of the following is NOT an example of an adaptive defense mechanism against predation? (A) Bright colors of bird‑pollinated flower (B) Insect that resembles a stick (C) Nicotine […]
Why Kangaroos Natural Geographical Distribution Limited to Australian Continent
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- December 26, 2025
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Q.14 The natural geographical distribution of kangaroos is limited to the Australian continent because (A) abiotic factors determine the distribution (B) dispersal is limited by accessibility to other continents (C) […]
Aldol Cleavage of Glucose-6-Phosphate in Glycolysis
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- December 26, 2025
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Q.13 If an aldol cleavage of glucose-6-phosphate occurs in glycolysis, it will result in (A) Products of equal carbon chain length (B) Products of unequal carbon chain length (C) Removal […]
Industrial applications of phytase, xylanase, laccase and bromelain
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- December 26, 2025
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Q.12 Match the entries in Group I with that in Group II Group I Pectinase Xylanase Cellulase Enzymes Group II P) In paper and pulp processing Q) Delignification R) Gluten […]
Protein Synthesis Only in Prokaryotes
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- December 26, 2025
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Q.11 Which of the following is true of protein synthesis ONLY in prokaryotes? (A) Translation and transcription are coupled (B) The codon AUG codes for the start signal (C) The […]


