Calculate the heat of formation of benzene from the following data, assuming no resonance. Bond energies :

C – C = 83 kcal = 140 kcal C – H = 99 kcal

Heat of atomisation of C = 170 .9 kcal

Heat of atomisation of H = 52.1 kcal

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#Question id: 15609

#XL - S Microbiology

Most bacteria, some protozoans  and even archaea use poly-β-hydroxybutyrate, a polymerized form of β-PHB, as 

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#Question id: 15669

#XL - R Botany

 Which of the following is a description of generalized transduction?

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#Question id: 15671

#XL - S Microbiology

The lag phase of the bacterial growth curve is marked by

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#Question id: 15672

#XL - S Microbiology

Late log phase of the bacterial growth curve

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#Question id: 15673

#XL - S Microbiology

A urine sample with more than 100,000 organisms is considered indicative of infection. A urine sample containing 5,000 bacteria, with a generation time of 30 minutes, sits for 3 hours before finally being assayed. How many bacteria will then be present within the sample?

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#Question id: 15674

#XL - S Microbiology

During which phase of the bacterial growth curve does the total number of viable cells decline?