The source of restriction enzyme Sam 1 is:
Correct answer: B. Serratia marcescens
- A. Streptomyces achrmpogene
- B. Serratia marcescens
- C. Streptococcus pyogens
- D. Staphylococcus aureus
Explanation
So, the restriction enzyme SmaI, which stands for Serratia marcescens enzyme, is derived from the bacterium Serratia marcescens. This enzyme is commonly used in molecular biology research to cut DNA at specific recognition sites. It recognizes the sequence 5'-CCCGGG-3' and cuts between the second and third C residues. This process is important for DNA manipulation and analysis in various experiments.
This question appeared on the KMU Centralized Admission Test 2021 paper, which you can sit online with every answer explained.
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