At what time between 2 to 3 o’ clock minute and hour hand will right angle ?

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#Question id: 15657

#Unit 13. Methods in Biology

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

You next construct a MelA– MelB– double mutant, which gives the following behavior:

 

Which of your two models is consistent with this new data?

a) the MelA- MelB- double mutant is identical to the MelB- mutant

b) MelA- is epistatic to MelB-

c) MelB- is epistatic to MelA-

d) the MelA- MelB- double mutant is identical to the MelA- mutant

Which of the following is the correct prediction about the double mutants?

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#Question id: 642

#Unit 1. Molecules and their Interaction Relevant to Biology

The graphs P, Q and R show the variation of rate constant (k) with temperature. The reactions represented by P, Q and R, respectively, are

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#Question id: 5254

#Unit 5. Developmental Biology

Following signal transduction pathways can be grouped into several basic types, based on the sequence of intracellular events.

According to above figure, which of the following correctly represents the basic concepts of all signalling pathway?

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#Question id: 29480

#Unit 6. System Physiology – Plant

Which of the following hormone Enhance Cell Wall Extensibility without Acidification

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#Question id: 1069

#Unit 4. Cell Communication and Cell Signaling

Diseases of short duration frequently followed by long-term immunity are referred to as