A patient’s serum sample is added to a solution containing particulate antigen, but no agglutination is observed. What should be done next?  

GI stands for gastrointestinal tract

Name a parallel reaction that we have encountered for reaction 5. Type in the letter that corresponds to the correct answer.

Upload an image of your answer to this question. Both pyruvate decarboxylase (an enzyme associated with alcoholic fermentation) and one of the enzymes in the pyruvate dehydrogenase complex (E1) require thiamine pyrophosphate (TPP). In fact, the same substrate goes through a common carbanion intermediate in both of these enzymatic reactions.  Draw the arrow pushing mechanism for the formation of this common carbanion intermediate and show how it is stabilized. For TPP, you only have to show the structural part that is involved in the reaction, i.e. the business end of the cofactor.  (5 pts.)  Beginning with the common stabilized carbanion intermediate, draw the arrow pushing mechanism for how a covalent S-acetyl dihydrolipoyl intermediate is formed in the pyruvate dehydrogenase complex. For the cofactors, you only have to show the ring structural part that is involved in the reaction – again, the business end of the cofactor.  (5 pts.)   

       die Glasglocke     

 die Frischhaltefolie

Which of the following describes the characteristics of the torque produced by the muscles?

You are performing an overhead shoulder press (picture). During the exercise, the torque produced by the arm/dumbbell weight rotates the shoulder into ________ .

Explain why sitting with a forward head posture for a prolonged time can lead to neck pain using the concept of lever and mechanical advantage. Clearly explain your answer in complete sentences to receive full credit.

¿Qué están haciendo? Complete the following sentence with the correct present progressive form of the verb in parentheses. Type one word per answer box.                           á   é  í  ó   ú   ñ 1.Juan y Mateo al fútbol en el estadio. (jugar)  2.Tú tienes prisa; . (correr)               3.Nosotros tenemos un examen mañana; . (estudiar)  4.Anita su libro. (leer)