The generation and maintenance of a membrane electric potential requires which of the following:

a. active pumping of ions       

b. ion-specific membrane channel proteins

c. ATP                                    

d. a generally permeable membrane

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#Question id: 1632

#Unit 4. Cell Communication and Cell Signaling

A single plasma cell secretes:

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#Question id: 3054

#Unit 2. Cellular Organization

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: 32516

#Unit 1. Molecules and their Interaction Relevant to Biology

How lifesaving effect of sodium nitrite takes place during cyanide poisoning

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#Question id: 6624

#General Aptitude

Given set : (223 , 324, 425)

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#Question id: 5413

#General Aptitude

I was travelling from my home to office. If half of my journey was on train, which is at a speed of 60km/hr. then my friend called me to join him in his car. Thus from the next station, I covered half of the remaining journey by his car at 30kh/hr. his car broke down after that, and we together travelled the rest by Rickshaw at 10km/hr. the average speed of me during my entire journey is?