Properly cryopreserved semen stored in liquid nitrogen can retain spermatozoa fertility for an indefinite period, since the extremely low temperature halts metabolic activity and cellular degradation almost completely.
When the semen is frozen, spermatozoa may remain fertile for
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Question context
This question is part of 🧫 Biotechnology within the broader 🧬 Medical Science subject and appears in the PPSC Punjab Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.