Escherichia coli preferentially utilizes glucose by preventing the uptake of lactose and switching off transcription of the lac operon. This mechanism is known as 

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#Question id: 13200

#Unit 6. System Physiology – Plant

In the modification of translocation pathways, Interference with a translocation pathway by wounding or pruning can alter the patterns established by proximity and vascular connections. In the absence of direct connections between source and sink, vascular interconnections, called

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#Question id: 26481

#Unit 2. Cellular Organization

Which of the following are the characteristics of prokaryotic operator O1

a. Made up of 21-bp sequence 

b. It has twofold/dyad symmetry 

c. Recognized by two subunits of Lac repressor

d. On each O1 four unit of Lac repressor binds

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#Question id: 299

#Unit 1. Molecules and their Interaction Relevant to Biology

Which bond acts like a bridge two molecules formed by a covalent bond?

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#Question id: 16787

#Unit 13. Methods in Biology

The following observations are arranged in ascending order. The median of the data is 15 find the value of x. 

8, 11, 12, x + 6, 17, 18, 23 

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#Question id: 8776

#Unit 9. Diversity of Life Forms

What kind of evidence has recently made it necessary to assign the prokaryotes to either of two different domains, rather than assigning all prokaryotes to the same kingdom?