The chemical benzo(a)pyrene, found in cigarette smoke as well as in coal tar, undergoes metabolic activation in the lungs to form a potent mutagen that mainly, causes conversion of guanine (G) to thymine (T) bases, a transversion mutation, When applied to cultured bronchial epithelial cells, activated benzo(a)pyrene induces many mutations, including inactivating mutations of the p53 gene, at codon number______

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#Question id: 19097

#Unit 6. System Physiology – Plant

Erwinia is a pathogen that deploy__

a) Attacking Initial biotrophic phase and extensive plant tissue damage at later stages or even death

b) Intimate intracellular contact with plant cells and minimal plant cell damage

c) Releases pectic enzyme that dissolve the cell wall

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#Question id: 12027

#Unit 7. System Physiology – Animal

If you place a small piece of a cracker on your tongue, what would you expect to happen?

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#Question id: 19474

#Unit 12. Applied Biology

The cry gene of B. thuringiensis produces a protein, which forms _________ in the bacterial spores.

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#Question id: 11125

#Unit 7. System Physiology – Animal

In chemical synapses that involve a so-called second messenger, typically a G-protein linked to the postsynaptic receptor is activated when neurotransmitter binds to that receptor. Which of the following represents an activity performed by the activated second messenger?

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#Question id: 10452

#Unit 6. System Physiology – Plant

Phototropin has two LOV domains and a kinase domain, separated by an α-helical region (Jα). In the absence of light, which one of the following is correct prediction?