Tag: dbt jrf 2018

11. A litre of 18% glucose solution is converted anaerobically into methane and carbon dioxide. The theoretical maximum volume of gases at NTP assuming ideality, produced on complete conversion of […]

10. Random DNA hexamers containing A, T, G and C are generated by DNA synthesis. The fraction of the hexamers that will have 3 purines followed by 3 pyrimidines is: […]

A random number generator produces a uniform distribution of numbers between -1 and 1. The probability that a number produced by this generator is between 0.9 and 1 is 1. […]

8. An unbiased coin is tossed 100 times in experiment I and 1000 times in experiment II. Which one of the following statements is most likely to be TRUE regarding […]

6. Two experiments were conducted with an enzyme following MichaelisMenten kinetics at substrate concentrations of 0.5 g/l and 1 g/l. If the enzymatic reaction velocity increases approximately 2-fold at the […]

5. Solvent extraction using ethanol is used to purify a target metabolite from an aqueous broth. The partitioning coefficient is 3. The ratio of solvent to broth that is required […]

4. The protein concentration and enzyme activity in 100 mL of a cell free extract is 5 mg/mL and 2 units/mL, respectively. After multiple steps of purification, the final 10 […]

3. An essential oil has antimicrobial activity with an MIC of 15 mg/Kg and can be used as a bio preservative. This activity is lost at the rate of 1% […]

2. Water vapour transmission rate of a packaging film is 4g/m2 /day. A food product is packed in a rectangular pouch measuring 0.12m x 0.16m. The maximum amount of moisture […]

1. 10 g of a plant material is extracted in 100mL of a suitable buffer. On performing an assay for amylase activity, 100μl extract produced 6 μmoles glucose in 30 […]