A pure culture in exponential growth phase has a bacterial concentration of 6.4 x 10^8 cells/ml. If the bacterium has a generation time of 1 h, how long ago was the cell concentration 8.0 x 10^7 cells/ml?

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#Question id: 1740

#I Life Science/ Life Sciences Group – I-V

Activation of resting B-cells by T-helper cells depends directly upon costimulatory interaction between:

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#Question id: 20713

#SCPH01 Biochemistry

Under anaerobic conditions and in the presence of what microbial electron transfer and respiration can proceed if suitable exogenous electron acceptors are available

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#Question id: 828

#SCPH01 Biochemistry

Which of the following assistance have function to lift folding polypeptides out of the false minima in their folding funnels?

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#Question id: 5119

#SCPH01 Biochemistry

when the presumptive eye region from a gastrula is grafted into the trunk region of another neurula, it develops to somitic tissue; whereas transplant from eye region of later stage neurula develops as an eye-like structure in host embryo. Which statement describes the results best?

 

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#Question id: 1626

#SCPH01 Biochemistry

The initial complement component activated by complement-fixing antibodies is: