What unusual cellular characteristic does N. locustae share with the protist Mixotricha paradoxa, the organism discussed in the article “A Russian Doll of Symbiosis?”

Article link: http://eukaryoticmicrobe.blogspot.com/2011/12/russian-doll-of-symbiosis.html

What is the difference between a reversible and an irreversible inhibitor? What is the mode of action for the two most common reversible inhibitors, competitive and noncompetitive? When examined using a Lineweaver-Burk plot, how do each of these inhibitors change the plots? What information can be gained by examination of the intersection of these plots with the X and Y intercepts?

Solution A (1.0 M Sucrose) and solution B (1.0 M NaCl) are separated by a dialysis membrane. If the membrane is spontaneously permeable to Sucrose, NaCl, and Water, what is the INITIAL reaction of Sucrose, NaCl, and Water?

Why are animal cells not totipotent like plant cells? What kind of animal cells is totipotent?

When an Hfr cell conjugates with an F- usually there is no conversion of the F- to Hfr. Occasionally however it can happen and now you can have two Hfr. How can this rare conversion happen?

Regulation in bacteria and phages includes a number of exotic terms with which you can amaze/alarm your friends. Twelve terms are given below followed by twelve statements. Write the letter of the correct term. A single letter is sufficient. Not all letters need to be used, and a particular letter may be used more than once. (15 points)

Term list:

1. temporal control

2. positive control

3. negative control

4. inducible

5. non-inducible

6. repressible

7. constitutive

8. operator

9. repressor

10. effector molecule

11. feedback inhibition

12. suppressor mutation

13. 1. Phenotype with respect to beta-galactosidase synthesis for the partial diploid I+ O+Z+/I- Oc Z-     

___________

2. Phenotype of I+O+Z-/I+Oc Z+

___________

3. Phenotype of I+O+Z-/I-OcZ-

___________

4. Phenotype with respect to synthesis of tryptophan enzymes in the trp operon trpR+ Oc S+ (trpR codes for the repress, S=structural genes).

_______

5. Phenotype of trpR+ O+ S+ in the presence of tryptophan.

________

6. Regulatory molecule must be present at site in DNA (such as promoter) so that transcription can occur ____________.

7. Small molecules that bind to regulatory molecule such as repressor__________

8. Mutation that reverses effect of another mutation at a different site.

____________

9. Type of operons responding to catabolite repression (glucose effect).

___________

10. Post-translational control of biosynthetic pathway.

___________

                    11. Regulatory molecule that binds to operator region in DNA.

13. Describe one supportive measure for severe ARDS.

The parents of a 4-year-old boy explain to the clinic nurse that for weeks the child has been irritable and listless and even though he has developed a poor appetite, has gained weight. What signs and symptoms should the nurse look for, and what condition should the nurse suspect? What nursing interventions and parent education are appropriate?

11. Outline the general stages of a development cycle of a vaccine.

1. For food to pass into the stomach, it needs to pass through two sphincters. What are these two, What is the function of the second one (as in, the second sphincter the food would go through)? If this sphincter does not function properly, what medical issue could result?

Why are protein differ from one another in sugar content and structure ?

Give three reasons why chemical difference affects the 2D gel behaviour of the isoforms present.

I remember the professor telling the class LacZ and LacY both are not inducible. Maybe one of them is but not both. Please help explain.

For each of the E. coli strains containing the lac operon alleles listed, indicate whether the strain is inducible, constitutive, or unable to express ?-galactosidase and permease. Provide an explanation for your prediction

C. I+ O+ Z- Y+ / I? O^c Z+ Y?