Specialized cells differ from one another because they

If RNA polymerase malfunctions,

Bacteria, plants, and animals have all been used to create transgenic forms that are useful in

3. (20 points) The radioisotope 224Ra decays by alpha emission via two paths to the ground state of its daughter: 94% probability of alpha decay directly to the daughter ground state; 5% probability of alpha decay to an excited state before emitting a 0.241 MeV photon in an isomeric transition to reach the ground state of the daughter. Write the reaction equation for the alpha decay of 224Ra (4 points) Do not type this response into Canvas. Only include on scratch paper. Calculate the Q-value (in MeV) of this reaction. (4 points) What are the energies (in MeV) of the two associated alpha particles from the two decay modes? (6 points) Sketch the decay scheme for the decay of 224Ra with the associated probabilities, energies, and emissions for the alpha decays and any accompanying photons clearly labeled (6 points). Do not type this response into Canvas. Only include on scratch paper.    

Specialized cells differ from one another because they

If RNA polymerase malfunctions,

4. (20 points) A sample extracted from the tooth of a deceased cow contains 12.4-mg 90Sr (t1/2=28.8 y). a) (2 points) Briefly describe where 90Sr comes from and how it would end up in the tooth of a cow? Do not type this response into Canvas. Only include on scratch paper. b) (5 points) What is the activity of 90Sr present? c) (6 points) If the extracted sample is in equilibrium with the 90Y daughter (t1/2 = 64.0hr) what is the mass of 90Y in the sample?  d) (7 points) If 90Sr only is isolated from a new sample without any 90Y initially present, what will be the mass of 90Y in the new sample ~58 years after isolation? What will be the total activity of the sample from both the parent and daughter 58 years after isolation?    

These things are not allowed: Books (of any kind). This is a closed book exam. Restroom breaks. (Just like Mom said, “why didn’t go before we started???”) Leaving your workstation during the proctoring portion of the exam will result in an F grade for the entire exam. Hats (Come on people, no hoodies, baseball caps or any type of silly drinking hat) No hats. You may not use or have in the testing area iPads, tablets, smart watches, mobile phones or other mobile devices. You have 90 minutes to print and complete the document provided. Print the exam below on white unlined paper, single-sided (no double-sided printing). Graphing & Optimizations Exam with Virtual Proctoring Instructions.pdf

Which whitening solution oxidizes slower?

Use a T for a true statement and a F for a false statement [answer1] DAP stands for Dose Area Product [answer2] DAP is a quantity that reflects no only patient dose but also the amount of tissue irradiated [answer3] DAP decreases with increases field size [answer4] DAP is used to monitor radiation output [answer5] DAP detector is positioned on the table after it hits the patients before it hits the IR