Two train whose lengths 180m and 220m respectively are running in opposite direction with respective speeds of 40km/hr and 50km/hr. Time taken by them to cross one another will be (in seconds)

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#Question id: 11140

#Unit 7. System Physiology – Animal

Although the membrane of a "resting" neuron is highly permeable to potassium ions, its membrane potential does not exactly match the equilibrium potential for potassium because the neuronal membrane is also ________.

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#Question id: 28479

#Unit 5. Developmental Biology

which of the following transcription factors involve to downregulates the Oct4 and Nanog? 

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#Question id: 12734

#Unit 13. Methods in Biology

Name the US-based company which is able to provide personal genetic information based on analysis of disease genes such as diabetes and others.

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#Question id: 19187

#Unit 13. Methods in Biology

Choose the correct statement with regard to quantitative PCR?

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#Question id: 15618

#Unit 13. Methods in Biology

Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1-, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac-). During an condition  isolate  a second Lac– mutation, which you designate lac2-. Using P1 phage on this strain and use the resulting phage lysate to infect the lac2- strain, selecting for   Kanr   transductants. In this case, all 100   Kanr   transductants that are examined are Lac–. What does this result tell you about the relationship between the lac1- and lac2- mutations?