What is the major advantage of electron microscopes over light microscopes? What type of electron microscope would be used to view the three-dimensional features of a cell?

What do you think about the role of diet in relation to type 2 diabetes? Discuss

1. Compare and contrast the diseases epidermolysis bullosa simplex (EBS) and sickle cell anemia. Include molecular level details for one similarity and three differences.

The data table below represents offspring generated through a 3 point mapping cross in Drosophila. Use the table to answer the following questions:

a. What was the parental cross (parental genotypes)?

b. Fill in which phenotype represents the different classes (NCO, DCO, SCOs).

c. What is the relative order of the genes?

d. What is the map distance (centimorgans) between the first and second genes (region I)?

e. What is the map distance (centimorgans) between the second and third genes (region II)?

f. What is the coefficient of coincidence (C) and degree of interference (I)? What do these values mean?

diffusion experiment: my experiment was to cut an agar cube into 64 pieces and place it into different volumes of water. we placed it into 200 mL ( slope of 24) , 600 mL (slope of 12) , and 800 mL (slope of 8). The slope is from the graph, its rate of diffusion graph from each volume.

a. which had the largest affect on the rate of diffusion?

b) Based on your experiments, discuss at least two adaptations that affect diffusion in living organisms (physiological, structural, or behavioral features that evolved due to a selective advantage that was based on diffusion) . Do these match with the factors you identified in a?

Suppose that you isolated an enveloped helical RNA virus. Purified RNA from this virus is capable of supporting translation in a rabbit reticulocyte cellfree translation system or in any other such system Further analysis indicates that this virus replication is inhibited if infected cells are incubated with protease inhibitor such as trypsin inhibitor.

Based on this information, discuss the mechanism by which this virus replicates its genome in infected susceptible, permissive cells.

The effect of BSA on the attachment of NIH-3T3 to cell culture plates. BSA should have interfered with cell attachment.

Suggest a mechanism that might account for this.

Design a serial dilution to achieve a final dilution of 10^-4 such that there will be enough solution remaining in each dilution to use for an assay that requires 100 mL of sample in triplicate. Remember that better accuracy is obtained with relatively large dilutions if the total dilution is made from a series of smaller dilutions rather than one large dilution.

Consider the various components we have been discussion from basic insect form and function, diversity, trophic interactions, symbiosis, to the complexities of ecological interactions, and the foundations from your other courses such as microbiology and parasitology- to generate your own hypothetical vector. Select your pathogen, select your insect or arachnid taxon (with justification), potential host(s), and create a vector that is effective at infectious disease spread. Give it a COOL name.

1. Which of the following are TRUE about sperm?

Select one or more:

a. Hyaluronidase is the enzyme involved in dissolving the protective coating around the unfertilized ovum.

b. The first sperm cell to reach the egg successfully fertilizes that cell.

c. Sperm cells have half the number of chromosomes as a spermatagoium and are about the same size.

d. Sperm cell capacitation, which occurs after ejaculation, is required for sperm cells to be active.

e. Mitochodria are located in the mid piece of the tail below the head.

f. The head of the sperm contains the DNA from the father.

g. The acrosome is located at the base of the sperm cell's tail.

1 A)What are the two different categories of cell types? How are they alike? How are they different?

1 B)If you are a bacterial biologist and you want to develop an antibiotic that will kill bacterial cells but not harm humans, what would you look for as a place to focus?

1. What is an amphipathic compound? Describe one that is used in your home and what function it serves.

Cytosolic Ca2+ is an important “second messenger”, and is usually maintained at sub-micromolar concentrations. List 3 distinct mechanisms through which the cytosolic concentration of Ca2+ is regulated.

39. Which metabolic pathway makes the least contribution to the control of blood glucose levels?

Select one:

a. glycolysis

b. gluconeogenesis

c. glycogen pathways

d. pentose phosphate pathway

e. TCA cycle