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?

#Question id: 40

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

Given that the standard free-energy change for the reaction glucose + Pi → glucose 6-phosphate is 13.8 kJ/mol, and the standard free-energy change for the reaction ATP → ADP + Pi is −30.5 kJ/mol, what is the free-energy change for the reaction glucose + ATP → glucose 6-phosphate + ADP?

#Question id: 4169

#SCPH05 I Biotechnology

The first amino acid incorporated into proteins __.

#Question id: 1119

#SCPH28 | Zoology

Phosphorylation cascades involving a series of protein kinases are useful for cellular signal transduction because they:

#Question id: 4597

#SCPH28 | Zoology

Cotton-topped tamarins are small primates with tufts of long white hair on their heads. While studying these creatures, you notice that males with longer hair get more opportunities to mate and father more offspring. To test the hypothesis that having longer hair is adaptive in these males, you should ________.

#Question id: 8861

#SCPH06 I Botany

Which of the following is true of members of the phylum Cnidaria?