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In Drosophila, the anterior determinant Bicoid is known to activate expression of the gene hunchback in the anterior half of the embryo. (Bicoid is a transcription factor, which binds to the promoter of the hunchback gene and stimulates transcription.) The gene chapeau is also activated by Bicoid, but requires higher levels of Bicoid to activate its expression than the hunchback gene requires. Where would you predict chapeau mRNA would be observed in a wild-type embryo?
a) Throughout the embryo
b) In the anterior half of the embryo
c) In the anterior quarter of the embryo
d) In the anterior ¾ of the embryo
e) In the posterior half of the embryo
f) In the posterior quarter of the embryo
Tina administered 1 liter of sterile distilled water IV to a patient. Predict the direction (increase, decrease, no change) you would expect Tina's infusion to have produced in the
Regulation of the Citric Acid Cycle The citric acid cycle is regulated by certain enzymes and by the availability of ADP.
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Q. What are the three main types of viral hepatitis? There are various types of viral hepatitis. The most vital epidemiologically are hepatitis A, hepatitis B and hepatitis C.
Elastase The inactive proelastase is activated by trypsin to the active form elastase. Elastase attacks peptide bonds next to the small amino acid residues such 3s g
why does an organism internal environment change
Classification of Phytoestrogens? Phytoestrogens can be divided into 3 main classes: - Isoflavones, - Coumestans and - Lignans. All are diphenolic compounds with st
Define Advantages of Colonies Obtained At Different Dilution 1. As colonies grow both on the surface and beneath the agar surface, so aerobes facultative anaerobes and non-stri
What do biomass pyramids represent? The Biomass pyramids represent the sum of the masses of the individuals that participate in each trophic level of a food chain.
Most of the water taken up by a plant passes through it and is evaporated to the atmosphere. What use is made of the tiny fraction of this water which is retained by the plant?
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