On entering a germinal center, the primary B-blasts grow exponentially to form which cell type in the dark zone?

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#Question id: 10989

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

What is the resting membrane potential of the sinus nodal fibers?

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#Question id: 18692

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

Which methods can be used for detection of self complementary regions of a sequence.

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#Question id: 1130

#SCPH28 | Zoology

In muscle cells, glycogen phosphorylase kinase is activated by

a. Ca2+.           b. diacylglycerol.   c. nitric oxide.       d. protein kinase A.    

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#Question id: 10985

#SCPH06 I Botany

What is the membrane potential (threshold level) at which the S-A node discharges?

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#Question id: 53

#SCPH05 I Biotechnology

Calculate the number of times the DNA of a modern E. coli cell has been copied accurately since its earliest bacterial precursor cell arose about 3.5 billion years ago. Assume for simplicity that over this time period, E. coli has undergone, on average, one cell division every 12 hours (this is an overestimate for modern bacteria, but probably an underestimate for ancient bacteria).