In one experiment, another protein –protein interaction is used in place of that between CAP and polymerase. This is done by taking two proteins known to interact with each other, attaching one to a DNA-binding domain, and, with the other, replacing the carboxy-terminal domain of the polymerase a subunit (aCTD), which one is appropriate result of this experiment-

I. The modified polymerase can be inhibited if the appropriate DNA-binding site is introduced near the promoter.

II. The modified polymerase can be activated by the makeshift “activator” as long as the appropriate DNA-binding site is introduced near the promoter.

III. The activator having only to help polymerase bind to the promoter

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#Question id: 27981

#Unit 1. Molecules and their Interaction Relevant to Biology

The free energy required for the release of ATP from F_O-F₁ is provided by

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#Question id: 1584

#Unit 4. Cell Communication and Cell Signaling

Which cell type interacts with both the humoral and cell-mediated immune pathways?

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#Question id: 18886

#Unit 13. Methods in Biology

What type of microscopy allows for the visualization of internal components within live, unstained specimens?

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#Question id: 15847

#Unit 4. Cell Communication and Cell Signaling

Pathogen-associated molecular patterns (or PAMPs) are common foreign structures that characterize whole groups of pathogens. It is these unique antigenic structures that the immune system frequently recognizes first. Animals, both invertebrates and vertebrates, have evolved to express several types of cell surface and soluble proteins that quickly recognize many of these PAMPs; a form of pathogen profiling. For example, encapsulated bacteria possess a polysaccharide coat with a unique chemical structure that is not found on other bacterial or human cells. White blood cells naturally express a variety of receptors, collectively referred to as pattern recognition receptors (PRRs), that specifically recognize these sugar residues, sugar residues is recognised by?

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#Question id: 11778

#Unit 10. Ecological Principles

Asexually-produced offspring, descended from the same parent and bearing the same genotype, constitute a