In which studies have shown that phosphorylated NtrC bound at enhancers and σ54-polymerase bound at the promoter interact directly, forming a loop in the DNA between the binding sites?

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#Question id: 1702

#Section 2: General Biology

αβ T-cells recognizing MHC plus processed peptide can:

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#Question id: 384

#Section 4: Fundamentals of Biological Engineering

A solution was prepared by dissolving 0.02 moles of acetic acid (HOAc; pKa = 4.8) in water to give 1 liter of solution. What is the pH? To this solution was then added 0.008 moles of concentrated sodium hydroxide (NaOH). What is the new pH? (In this problem, you may ignore changes in volume due to the addition of NaOH).

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#Question id: 3744

#Section 3: Genetics, Cellular and Molecular Biology

Deaminated bases must be removed from DNA because

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#Question id: 15787

#Section 1: Engineering Mathematics

If  then A 

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#Question id: 4746

#Section 3: Genetics, Cellular and Molecular Biology

Two independent pure line varieties having deep red and brown phenotype in their seed coat were cross, the all f1 progeny is deep red. The F2 progeny obtain from selfing show deep red and brown in ratio of 15:1. Which of the following observation is correct?