Gupta scored 55 with 9 fours in 112 balls, while ID Singh hit 59 with 11 fours in 105 balls as they stitched a 109-run stand to help J&K rally from 14 for two at the BKC ground.
Tripura, sitting above J&K in the points table, had rocked their rivals by taking early wickets through medium paces MB Murasingh and Rana Dutta, who packed off the in-form Shubham Khajuria and Umar Nissar cheaply.
After Bisht's dismissal, Partap got an able ally in bowler Samiullah Beigh (35 not out) and the duo strung together another crucial stand of 89 for the unbroken seventh wicket to pull J&K around again.
Brief scores:
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J&K 1st innings: 270 for six in 90 overs (Aditya Partap 65 batting, Ian Dev Singh 59, Pranav Gupta 55; MB Murasingh 2/59, Rana Dutta 2/61) vs Tripura.
1) Kerala vs Andhra at Guwahati
Kerala 1st innings: 188 for eight in 89.5 overs (Mohammed Azharuddeen 82, Rohan Prem 42; DP Vijaykumar 6/37).
2) Chhattisgarh vs Hyderabad at Valsad
Hyderabad 1st innings: 267 for four in 88 overs (S Badrinath 134, BP Sandeep 73; Abhimanyu Chauhan 2/22).
3) Goa vs Haryana at Ghaziabad
Goa 1st innings: 197 for six in 85 overs (Snehal Kauthankar 80 batting; Harshal Patel 3/52).
4) Himachal Pradesh vs Services at Surat
Services 1st innings: 276 for four in 90 overs (Ravi Chauhan 149, Nakul Verma 113 batting; Rankaj Jaiswal 2/55).