Hydrogen bonding occurs in molecules when ___________________.

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#Question id: 12670

#SCPH06 I Botany

 Changement  in the physiology or morphology of the individual is a nonpermanent  or  temporary and that can be reversed if the prevailing environmental conditions change is termed as 

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#Question id: 12917

#SCPH28 | Zoology

Arrange the steps of stages in PCR in correct order.

1. The region to be specifically amplified is made accessible within the complex DNA.

2. The double stranded DNA is denatured by heating the reaction mixture to above 90 degree Celsius.

3. A thermal cycler is used to incrementally decrease the annealing temperature.

4. Reaction mixture is then cooled to a temperature between 40 and 60 degree celsius.

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#Question id: 1065

#SCPH28 | Zoology

Resistance of some animals to certain viral diseases is based on

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#Question id: 15713

#SCPH28 | Zoology

A relatively ______ concentration of auxin favours cell proliferation and root differentiation while _______levels of cytokinin promote bud differentiation.

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#Question id: 15653

#SCPH06 I Botany

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 have isolated a mutation that causes constitutive melibiase activity, which you designate MelA–. P1 phage mapping experiments using a Tn5 insertion linked to Mel1 show that MelA– is not linked to Mel1. Moreover you find that when an amber suppressor is introduced into a MelA– mutant, normal melibiase regulation is restored. Classify the MelA– mutation on the basis of genetic properties,  make a proposal for the type of regulatory functions affected by the MelA– mutation?