In a sewage-treatment plant, a large concrete tank initially contains 440 000 litres liquid and 10 000 kg fine suspended solids. To flush this material out of the tank, water is pumped into the vessel at a rate of 40 000 litres h^{- 1}. Liquid containing solids leaves at the same rate. Estimate the concentration of suspended solids in the tank at the end of 5 h._______________________.

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#Question id: 14114

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

‘A laboratory, where drugs, chemicals, and other types of biological matter can be analysed and tested by using various liquids’ is called 

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#Question id: 4802

#Section 3: Genetics, Cellular and Molecular Biology

Why is tetrad analysis useful for studying genetics?

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#Question id: 3778

#Section 3: Genetics, Cellular and Molecular Biology

Which of the following effects might be caused by reduced or very little active telomerase activity?

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#Question id: 1865

#Section 2: General Biology

What deficiency is indicated by poor skin test results to a range of microbial antigens such as tuberculin and mumps?

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#Question id: 12940

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

 Choose the correct order for the steps involve in Protein engineering.

1. Protein modelling

2. Protein crystallography

3. Site-directed mutations

4. Comparison with entries in databases of known proteins.