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Biology · 2026 · 1 mark
CBSE 2026 · Region 3 · Set 1 · Q3
Match Column I with Column II and select the correct option:
Match Column I with Column II and select the correct option :
| Column I | Column II |
| a. Primers | i. $\displaystyle \beta$-galactosidase |
| b. Insertional inactivation | ii. To separate and purify products |
| c. Bioreactor | iii. Chemically synthesized oligonucleotides |
| d. Downstream processing | iv. Large scale production of specific product of activity of microbes |
Official answer
(A)
a-iii, b-i, c-iv, d-ii
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.