In which type of chromatography, the stationary phase held in a narrow tube and the mobile phase is forced through it under pressure?

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#Question id: 12703

#Unit 8. Inheritance Biology

In the plants, due to mutation in the mitochondrial genome causing cytoplasmic male sterility can be influenced by the nuclear gene (Rf),  which is dominant over the cytoplasmic mitochondrial genome. If a male sterile plant  is pollinated by the fertile male plant with homozygous (Rf)condition, the progeny obtained in F1 will have

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#Question id: 4707

#Unit 11. Evolution and Behavior

For which one of the following observations were both Lamarck's hypothesis and Darwin's hypothesis in complete agreement?

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#Question id: 2235

#Unit 2. Cellular Organization

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: 18821

#Unit 13. Methods in Biology

The PCR technique designed to minimize amplification of non-specific PCR products by using 2 primer set is

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#Question id: 33899

#Unit 2. Cellular Organization

A. In E.coli, a natural closed DNA that is negatively supercoiled.

B. The intercalation of ethidium bromide first removes the negative supercoils and then introduces positive supercoils.